Akinori HOSHIKAWAAssociate Professor

■Researcher basic information

Organization

  • Graduate School of Science and Engineering（Master's Program） Major in Quantum Bean Science
  • Graduate School of Science and Engineerin（Doctoral Program） Major in Quantum Bean Science
  • Research and Education Center for Atomic Sciences
  • Faculty of Applied Science and Engineering Domain of Beam Line Science

Research Areas

  • Energy, Quantum beam science
  • Nanotechnology/Materials, Structural and functional materials
  • Natural sciences, Mathematical physics and basic theory

Research Keyword

  • Quantum beam
  • Materials Science
  • Instrument development

Degree

  • 1999年03月　博士（理学）（北海道大学）

Career

  • Apr. 2024 - Present, Ibaraki University, Research and Education Center for Atomic Sciences, Associate Professor
  • Sep. 2010 - Mar. 2024, Ibaraki University, Frontier Research Center for Applied Atomic Sciences, Associate Professor
  • Apr. 2008 - Aug. 2010, Ibaraki University, Frontier Research Center for Applied Atomic Sciences, Assistant Professor
  • Oct. 2007 - Apr. 2008, Ibaraki University, Office of Frontier Research Center for Applied Atomic Sciences, Assistant professor
  • Apr. 2006 - Sep. 2007, Japan Atomic Energy Agency, senior post doctoral fellow
  • Apr. 2004 - Mar. 2006, Japan Atomic Energy Research Institute, Postdoctoral fellow
  • Sep. 2001 - Mar. 2004, High Energy Accelerator Research Organization, Postdoctoral Fellow
  • Apr. 1999 - Aug. 2001, JSPS Research Fellowships for Young Scientists

■Research activity information

Award

  • Dec. 2012, 日本中性子科学会第１０回技術賞, iMATERIAにおける試料自動交換ロボットの開発
    Japan society
  • Oct. 2010, The 1st Michael Meissner Prize of 6th International Workshop on Sample Environment at Neutron Scattering Facilities, Automatic sample exchange system for a large number of samples at room temperature
    International society

Paper

  • Revisiting NaxCoO2: A renewed magnetic phase diagram based on electrochemical reaction synthesis
    Ola Kenji Forslund; Jun Sugiyama; Daniel Andreica; Izumi Umegaki; Elisabetta Nocerino; Calvin Brett; Stephan Roth; L. Daniel Söderberg; Nami Matsubara; Thomas C. Hansen; Akinori Hoshikawa; Elodie Guerin; Claude Delmas; Yasmine Sassa; Martin Månsson, The assertion of intrinsic material properties based on measured experimental data is being challenged by emerging sample synthesis protocols, which opens new avenues for discovering novel functionalities. In this study, we revisit one of the most widely studied strongly correlated materials of the early 2000s, NaxCoO2 (NCO). Leveraging the sensitivity of muon spin rotation and relaxation (μ+SR) measurements, we discern significant differences between NCO samples synthesized via conventional solid-state reaction (SSR) and our electrochemical reaction (ECR) approach. Contrary to SSR-synthesized Na0.7CoO2, which exhibits a nonmagnetic ground state, our ECR-derived sample showcases an antiferromagnetic (AF) order from x≥0.7, challenging established phase boundaries. We attribute the observed magnetic phenomena in ECR-NCO to long-range order of Na-ions and/or vacancies, as well as the inherent flexibility of the crystal framework. Our study holds implications for tailoring and optimization of next-generation devices based on layered materials.

    Published by the American Physical Society 2025, American Physical Society (APS)
    Physical Review Research, 12 May 2025, [Reviewed]
  • Local noncentrosymmetric effect on antiferromagnetic ordering in the tetragonal crystal structure phase of Eu3Ir4Sn13
    Takanobu Kumada; Yotaro Suzuki; Kazuaki Iwasa; Keitaro Kuwahara; Hajime Sagayama; Hironori Nakao; Motoyuki Ishikado; Akinori Hoshikawa, Last, American Physical Society (APS)
    Physical Review B, 31 Mar. 2025, [Reviewed]
  • Degradation of Polypropylene by Ultraviolet Light and Higher Order Structure　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Hidemaru Sootome, Lead
    SPring-8/SACLA Research Report, Jun. 2024, [Reviewed]
  • 中性子回折によるパーメンジュール合金の高温相変態解析　　　　　　　　　　　　　　　
    佐藤李行; 河原幸汰; 富田俊郎; 星川晃範; 鈴木 茂; 佐藤成男
    Ｘ線分析の進歩55, Mar. 2024, [Reviewed]
  • Na-ion dynamics in the solid solution NaxCa1−xCr2O4 studied by muon spin rotation and neutron diffraction
    Elisabetta Nocerino; Ola Kenji Forslund; Hiroya Sakurai; Nami Matsubara; Anton Zubayer; Federico Mazza; Stephen Cottrell; Akihiro Koda; Isao Watanabe; Akinori Hoshikawa; Takashi Saito; Jun Sugiyama; Yasmine Sassa; Martin Månsson, Thermally activated Na diffusion mechanism in the honeycomb-like 1D channels of the solid solution NaxCa1−xCr2O4., Royal Society of Chemistry (RSC)
    Sustainable Energy & Fuels, Feb. 2024, [Reviewed]
  • Competition between magnetic interactions and structural instabilities leading to itinerant frustration in the triangular lattice antiferromagnet LiCrSe2
    Elisabetta Nocerino; Shintaro Kobayashi; Catherine Witteveen; Ola K. Forslund; Nami Matsubara; Chiu Tang; Takeshi Matsukawa; Akinori Hoshikawa; Akihiro Koda; Kazuyoshi Yoshimura; Izumi Umegaki; Yasmine Sassa; Fabian O. von Rohr; Vladimir Pomjakushin; Jess H. Brewer; Jun Sugiyama; Martin Månsson, Abstract

    LiCrSe2 constitutes a recent valuable addition to the ensemble of two-dimensional triangular lattice antiferromagnets. In this work, we present a comprehensive study of the low temperature nuclear and magnetic structure established in this material. Being subject to a strong magnetoelastic coupling, LiCrSe2 was found to undergo a first order structural transition from a trigonal crystal system ($$P\bar{3}m1$$) to a monoclinic one (C2/m) at Ts = 30 K. Such restructuring of the lattice is accompanied by a magnetic transition at TN = 30 K. Refinement of the magnetic structure with neutron diffraction data and complementary muon spin rotation analysis reveal the presence of a complex incommensurate magnetic structure with a up-up-down-down arrangement of the chromium moments with ferromagnetic double chains coupled antiferromagnetically. The spin axial vector is also modulated both in direction and modulus, resulting in a spin density wave-like order with periodic suppression of the chromium moment along the chains. This behavior is believed to appear as a result of strong competition between direct exchange antiferromagnetic and superexchange ferromagnetic couplings established between both nearest neighbor and next nearest neighbor Cr3+ ions. We finally conjecture that the resulting magnetic order is stabilized via subtle vacancy/charge order within the lithium layers, potentially causing a mix of two co-existing magnetic phases within the sample., Springer Science and Business Media LLC
    Communications Materials, 07 Oct. 2023, [Reviewed]
  • Unusually large magnetic moment and tricritical behavior of the CMR compound NaCr2O4 revealed with high resolution neutron diffraction and μ+SR　　　　　　　　　　　　　　　
    Elisabetta Nocerino; Ola Kenji Forslund; Hiroya Sakurai; Akinori Hoshikawa; Nami Matsubara; Daniel Andreica; Anton Zubayer; Federico Mazza; Takashi Saito; Jun Sugiyama; Izumi Umegaki; Yasmine Sassa and Martin Månsson
    J. Phys. Mater., Jul. 2023, [Reviewed]
  • Magnetic Ordering and Structural Phase Transitions of Nd3T4Sn13 (T = Rh and Ir)　　　　　　　　　　　　　　　
    Ami Shimoda; Kazuaki Iwasa; Keitaro Kuwahara; Hajime Sagayama; Hironori Nakao; Motoyuki Ishikado; Takashi Ohhara; Akiko Nakao; Akinori Hoshikawa; and Toru Ishigaki
    JPS Conf. Proc., May 2023, [Reviewed]
  • 低合金TRIP 鋼の二相域温度によるミクロ組織形成依存性の中性子回折観察　　　　　　　　　　　　　　　
    河原幸汰; 梅村和希; 平野孝史; 小貫祐介; 星川晃範; 富田俊郎; 佐藤成男
    Ｘ線分析の進歩54, Mar. 2023, [Reviewed]
  • 〔Major achievements〕Observation of hydrogen bonding network in hydrogen sulfide hydrate using neutron diffraction　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Akihiro Hachikubo
    Chem. Phys. Lett., Feb. 2023, [Reviewed]
  • Nuclear and magnetic spin structure of the antiferromagnetic triangular lattice compound LiCrTe2 investigated by μ+ SR, neutron and X-ray diffraction　　　　　　　　　　　　　　　
    E. Nocerino; C. Witteveen; S. Kobayashi; O. K. Forslund; N. Matsubara; A. Zubayer; F. Mazza; S. Kawaguchi; A. Hoshikawa; I. Umegaki; J. Sugiyama; K. Yoshimura; Y. Sassa; F. O. von Rohr & M. Månsson
    Scientific reports, Dec. 2022, [Reviewed]
  • Crystal Structures and Conduction Paths of Sc-doped CaTiO3 Fast Oxide-ion Conductors with Orthorhombic Symmetry
    Katsuhiro Nomura; Shin-ichi Hashimoto; Tomoaki Namioka; Hiroaki Kato; Takeshi Hagiwara; Akinori Hoshikawa, American Chemical Society (ACS)
    Inorg. Chem., Oct. 2022, [Reviewed]
  • 〔Major achievements〕Structural changes due to the ordered guest molecules in deuterated ethane hydrate　　　　　　　　　　　　　　　
    Akinori Hoshikawa
    Chem. Phys. Lett., Aug. 2022, [Reviewed]
  • Direct Observation of Nucleus of Lithium in a C60 Fullerene Cage by Neutron Diffraction Study　　　　　　　　　　　　　　　
    E. Kwon; T. Matsukawa; A. Hoshikawa; T. Ishigaki; S. Aoyagi; K. Kawachi; Y. Kasama
    Chem. Phys. Lett., Aug. 2022, [Reviewed]
  • Crystal Structure of Hydrogen Sulfide Hydrate　　　　　　　　　　　　　　　
    Takashi Mochiku; Akinori Hoshikawa; Akihiro Hachikubo; Yoshio Katsuya; Masahiko Tanaka; Shigeki Konishi; Osami Sakata
    SPring-8/SACLA利用研究成果集, Apr. 2022, [Reviewed]
  • 中性子回折測定によるRietveld 解析を用いた低合金TRIP 鋼の相変態観察　　　　　　　　　　　　　　　
    梅村和希; 小貫祐介; 星川晃範; 富田俊郎; 田中泰明; 藤原知哉; 諏訪嘉宏; 河野佳織; 佐藤成男, 日本分析化学会
    X線分析の進歩53, Mar. 2022, [Reviewed]
  • Texture Memory in Si-Mn and ODS Steels Observed In Situ by Pulsed Neutron and Synchrotron X-Ray Diffractions and Prediction by Double Kurdjumov-Sachs Relation: A Concept for Intense Variant Selection　　　　　　　　　　　　　　　
    Toshiro Tomida; Elena Vakhitova; Denis Sornin; Jonathan Wright; Manuel François; Yusuke Onuki; Takashi Hirano; Akinori Hoshikawa; Toru Ishigaki; Shigeo Sato
    Metallurgical and Materials Transactions A, Apr. 2021, [Reviewed]
  • 〔Major achievements〕Automatic Sample Changer for In-situ Observation during Charging and Discharging Process of Battery　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Toru Ishigaki
    JPS Conf. Proc., Mar. 2021, [Reviewed]
  • Rietveld texture解析を用いた鉄鋼ミクロ組織評価における等方性温度因子の影響　　　　　　　　　　　　　　　
    平野 孝史; 小貫 祐介; 星川 晃範; 富田 俊郎; 佐藤 成男, アグネ技術センター
    X線分析の進歩 51, Mar. 2020, [Reviewed]
  • Tetragonality induced superconductivity in anti-ThCr2 Si2-type RE2 O2 Bi (RE= rare earth) with Bi square nets
    Ryosuke Sei; Hideyuki Kawasoko; Kota Matsumoto; Masato Arimitsu; Kyohei Terakado; Daichi Oka; Shintaro Fukuda; Noriaki Kimura; Hidetaka Kasai; Eiji Nishibori; Kenji Ohoyama; Akinori Hoshikawa; Toru Ishigaki; Tetsuya Hasegawa; Tomoteru Fukumura,

    Superconductivity in RE2O2Bi was universally governed by unit cell tetragonality c/a, irrespective of the usually destructive long-range magnetic ordering.

    , Royal Society of Chemistry (RSC)
    Dalton Transactions, Mar. 2020, [Reviewed]
  • In Situ Observation of Bainite Transformation and Simultaneous Carbon Enrichment in Austenite in Low-Alloyed TRIP Steel Using Time-of-Flight Neutron Diffraction Techniques　　　　　　　　　　　　　　　
    Y Onuki; T Hirano; A Hoshikawa; S Sato; T Tomida
    Metall. Mat. Trans. A, Nov. 2019, [Reviewed]
  • Composition-driven structural variation in ferrielectric phase of (Bi1/2Na1/2) TiO3-Ba (Mg1/3Nb2/3) O3
    Y. Kitanaka; K. Makisumi; Y. Noguchi; M. Miyayama; A. Hoshikawa; T. Ishigaki, IOP Publishing
    J. J. Appl. Phys., Nov. 2019, [Reviewed]
  • Investigation of magnetism and magnetic structure of anti-ThCr2Si2-type Tb2O2Bi by magnetization and neutron diffraction measurements
    Hideyuki Kawasoko; Kenji Ohoyama; Ryosuke Sei; Kota Matsumoto; Daichi Oka; Akinori Hoshikawa; Toru Ishigaki; Tomoteru Fukumura
    AIP Advances, Nov. 2019, [Reviewed]
  • Analysis of reverse transformation behavior in iron-based alloys based on quantitative microstructure information by neutron diffraction　　　　　　　　　　　　　　　
    Kenta Hanawa; Yusuke Onuki; Yuta Uemura; Akinori Hoshikawa; Shigeru Suzuki; Hiroaki Otsuka; Yuya Chiba; Shigeo Sato
    J. Iron Steel. Inst. Jpn., Oct. 2019, [Reviewed]
  • 〔Major achievements〕Evaluation of filling rate of methane in methane-propane hydrate by neutron powder diffraction　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Takeshi Matsukawa; Toru Ishigaki
    Physica B, Dec. 2018, [Reviewed]
  • Z-MEM, Maximum Entropy Method software for electron/nuclear density distribution in Z-Code
    Yoshihisa Ishikawa; Junrong Zhang; Ryoji Kiyanagi; Masao Yonemura; Takeshi Matsukawa; Akinori Hoshikawa; Toru Ishigaki; Shuki Torii; Ryoko Oishi-Tomiyasu; Takashi Kamiyama
    Physica B, Dec. 2018, [Reviewed]
  • Local Disorder in Proton Conductor BaSn0. 5In0. 5O2.75 Analyzed by Neutron Diffraction/Atomic Pair Distribution Function　　　　　　　　　　　　　　　
    Naoki Igawa; Katsuaki Kodama; Tomitsugu Taguchi; Yukihiko Yoshida; Takeshi Matsukawa; Akinori Hoshikawa; Toru Ishigaki
    Trans. Mater. Res. Soc. Jpn., Dec. 2018, [Reviewed]
  • Crystal structure and ferroelectric polarization of tetragonal (Bi1/2Na1/2) TiO3-12BaTiO3　　　　　　　　　　　　　　　
    Yuuki Kitanaka; Motohiro Ogino; Yuji Noguchi; Masaru Miyayama; Akinori Hoshikawa; Toru Ishigaki
    J. J. Appl. Phys., Oct. 2018, [Reviewed]
  • Neutron Diffraction Studies on Valence Ordering Compound YbPd
    Kohei Oyama; Masaki Sugishima; Kousuke Tanabe; Akihiro Mitsuda; Hirofumi Wada; Kenji Ohoyama; Takeshi Matsukawa; Yukihiko Yoshida; Akinori Hoshikawa; Toru Ishigaki; Kazuaki Iwasa
    J. Phys. Soc. Jpn., Oct. 2018, [Reviewed]
  • Temperature-induced structural transition of ceria by bulk reduction under hydrogen atmosphere　　　　　　　　　　　　　　　
    T. Matsukawa; A. Hoshikawa; T. Ishigaki
    CrystEngComm, Aug. 2018, [Reviewed]
  • Large entropy change derived from orbitally assisted three-centered two-electron bond formation in metallic Li0.33VS2
    N Katayama; S Tamura; T Yamaguchi; K Sugimoto; K Iida; T Matsukawa; A Hoshikawa; T Ishigaki; S Kobayashi; Y Ohta; H Sawa, American Physical Society (APS)
    Phys. Rev. B, Aug. 2018, [Reviewed]
  • Strain-Induced Martensitic Transformation and Texture Evolution in Cold-Rolled Co-Cr Alloys　　　　　　　　　　　　　　　
    Yusuke Onuki; Shigeo Sato; Maiko Nakagawa; Kenta Yamanaka; Manami Mori; Akinori Hoshikawa; Toru Ishigaki; Akihiko Chiba
    Quantum Beam Sci., Jun. 2018, [Reviewed]
  • Development and verification of simultaneous measurement system for texture and phase fraction by time-of-flight neutron diffraction at iMATERIA　　　　　　　　　　　　　　　
    Y Onuki; A Hoshikawa; S Sato; S Nishino; T Ishigaki; T Tomida
    IOP Conf. Ser.: Mater. Sci. Eng., Jun. 2018, [Reviewed]
  • Rietveld Texture Analysis for Metals Having Hexagonal Close-Packed Phase by Using Time-of-Flight Neutron Diffraction at iMATERIA
    Yusuke Onuki; Akinori Hoshikawa; Soichiro Nishino; Shigeo Sato; Toru Ishigaki
    Adv. Eng. Mater., Apr. 2018, [Reviewed]
  • Mesoscopic Investigation of an “Immiscible” Cyclohexane and Water Micro-mixture in Carbon Micropores by Contrast Variation Small-angle Neutron Scattering　　　　　　　　　　　　　　　
    Masatsugu Yoshimoto; Yukihiko Yoshida; Yohei Noda; Satoshi Koizumi; Shinichi Takata; Junichi Suzuki; Akinori Hoshikawa; Toru Ishigaki; Sumio Ozeki; and Taku Iiyama
    Chem. Lett., Jan. 2018, [Reviewed]
  • Crystal structure of blue-colored ceria during redox reactions in a hydrogen atmosphere
    Takeshi Matsukawa; Akinori Hoshikawa; Eiki Niwa; Masatomo Yashima and Toru Ishigaki
    CrystEngComm, Jan. 2018, [Reviewed]
  • Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex II: Neutron Scattering Instruments
    Kenji Nakajima; Yukinobu Kawakita; Shinichi Itoh; Jun Abe; Kazuya Aizawa; Hiroyuki Aoki; Hitoshi Endo; Masaki Fujita; Kenichi Funakoshi; Wu Gong; Masahide Harada; Stefanus Harjo; Takanori Hattori; Masahiro Hino; Takashi Honda; Akinori Hoshikawa; Kazutaka Ikeda; Takashi Ino; Toru Ishigaki; Yoshihisa Ishikawa; Hiroki Iwase; Tetsuya Kai; Ryoichi Kajimoto; Takashi Kamiyama; Naokatsu Kaneko; Daichi Kawana; Seiko Ohira-Kawamura; Takuro Kawasaki; Atsushi Kimura; Ryoji Kiyanagi; Kenji Kojima; Katsuhiro Kusaka; Sanghyun Lee; Shinichi Machida; Takatsugu Masuda; Kenji Mishima; Koji Mitamura; Mitsutaka Nakamura; Shoji Nakamura; Akiko Nakao; Tatsuro Oda; Takashi Ohhara; Kazuki Ohishi; Hidetoshi Ohshita; Kenichi Oikawa; Toshiya Otomo; Asami Sano-Furukawa; Kaoru Shibata; Takenao Shinohara; Kazuhiko Soyama; Jun-ichi Suzuki; Kentaro Suzuya; Atsushi Takahara; Shin-ichi Takata; Masayasu Takeda; Yosuke Toh; Shuki Torii; Naoya Torikai; Norifumi L. Yamada; Taro Yamada; Dai Yamazaki; Tetsuya Yokoo; Masao Yonemura and Hideki Yoshizawa
    Quantum Beam Sci., Dec. 2017, [Reviewed]
  • TOF型パルス中性子回折を用いた金属ミクロ組織解析
    佐藤 成男、小貫 祐介、星川 晃範、中川 真惟子、山中 謙太、富田 俊郎, アグネ技術センター
    金属, Nov. 2017, [Reviewed]
  • Quantitative phase fraction analysis of steel combined with texture analysis using timeof-flight neutron diffraction　　　　　　　　　　　　　　　
    Yusuke Onuki; Akinori Hoshikawa; Shigeo Sato; Toru Ishigaki; Toshiro Tomida
    J. Phys. Soc. Jpn., Oct. 2017, [Reviewed]
  • Time-of-Flight Elastic and Inelastic Neutron Scattering Studies on the Localized 4d Electron Layered Perovskite La5Mo4O16
    Kazuki Iida; Ryoichi Kajimoto; Yusuke Mizuno; Kazuya Kamazawa; Yasuhiro Inamura; Akinori Hoshikawa; Yukihiko Yoshida; Takeshi Matsukawa; Toru Ishigaki; Yukihiko Kawamura; Soshi Ibuka; Tetsuya Yokoo5; Shinichi Itoh; and Takuro Katsufuji
    J. Phys. Soc. Jpn., May 2017, [Reviewed]
  • Unusually Stable Plastic Crystal Phase of CCl4 Confined in Graphitic Slit-shaped Micropores from Neutron Diffraction
    Masatsugu Yoshimoto; Ryusuke Futamura; Akinori Hoshikawa; Toru Ishigaki; Taro Uchida; and Taku Iiyama,

    Structural changes with temperature of CCl4 confined in a 1.1 nm slit-shaped carbon nanospace were investigated by neutron diffraction (ND) measurements and radial distribution function fdrdf analyses. Bulk CCl4 exhibits a plastic crystal (PC) phase between 225.5 and 250 K. In the confined space, although clear phase transition points cannot be determined, fdrdf suggests that the PC phase extends to temperatures as low as 160 K. The smooth surface of the activated carbon assists the rotational motion of CCl4.

    , The Chemical Society of Japan
    Chem. Lett., Apr. 2017, [Reviewed]
  • Evaluation of hydrogen-bonding distance in organic nonlinear optical crystals for high-output terahertz-wave generation
    Takeshi Matsukawa; Akinori Hoshikawa; Yoshihisa Ishikawa; Toru Ishigaki
    J. Mol. Struct., Apr. 2017, [Reviewed]
  • マクロ・ミクロスケール集合組織測定を併用したAZ31マグネシウム合金の室温変形機構の検討　　　　　　　　　　　　　　　
    小貫祐介、星川晃範、佐藤成男、石垣徹, 一般社団法人 軽金属学会
    軽金属, Nov. 2016, [Reviewed]
  • Rapid Measurement of Texture of Metals by Time-of-Flight Neutron Diffraction at iMATERIA and its Applications
    Y. Onuki; A. Hoshikawa; S. Sato; T. Ishigaki
    Materials Science Forum, Nov. 2016, [Reviewed]
  • Rapid measurement scheme for texture in cubic metallic materials using time-of-flight neutron diffraction at iMATERIA
    Y. Onuki; A. Hoshikawa; Shigeo Sato; Pingguang Xu; Toru Ishigaki; Yoichi Saito; Hidekazu Todoroki and Makoto Hayashi, A rapid texture measurement system has been developed on the time-of-flight neutron diffractometer iMATERIA (beamline BL20, MLF/J-PARC, Japan). Quantitative Rietveld texture analysis with a neutron beam exposure of several minutes without sample rotation was investigated using a duplex stainless steel, and the minimum number of diffraction spectra required for the analysis was determined experimentally. The rapid measurement scheme employs 132 spectra, and by this scheme the quantitative determination of volume fractions of texture components in ferrite and austenite cubic phases in a duplex stainless steel can be made in a short time. This quantitative and rapid measurement scheme is based on the salient features of iMATERIA as a powder diffractometer, i.e. a fairly high resolution in d spacing and numerous detectors covering a wide range of scattering angle.
    J. Appl. Cryst., Oct. 2016, [Reviewed]
  • Temperature Dependence of Crystal Structure and THz Absorption Spectra of Organic Nonlinear Optical Stilbazolium Material for High-Output THz-Wave Generation　　　　　　　　　　　　　　　
    Takeshi Matsukawa; Hiromichi Hoshina; Akinori Hoshikawa; Chiko Otani; Toru Ishigaki
    J. Infrared Milli Terahz Waves, Jun. 2016, [Reviewed]
  • Deformation mechanism of AZ31 magnesium alloy at room temperature studied by macro and micro texture measurements
    Yusuke Onuki; Akinori Hoshikawa; Shigeo Sato; Toru Ishigaki, Japan Institute of Light Metals
    Keikinzoku/Journal of Japan Institute of Light Metals, 2016
  • 20pPSB-30 Powder neutron diffraction of valence ordering compound YbPd
    Oyama K.; Mitsuda A.; Ohoyama K.; Matsukawa T.; Yoshida Y.; Hoshikawa A.; Ishigaki T.; Iwasa K.; Wada H., The Physical Society of Japan (JPS)
    Meeting Abstracts of the Physical Society of Japan, 2016
  • Forge-Hardened TiZr Null-Matrix Alloy for Neutron Scattering under Extreme Conditions　　　　　　　　　　　　　　　
    Takuo Okuchi; Akinori Hoshikawa and Toru Ishigaki
    Metals, Dec. 2015, [Reviewed]
  • 〔Major achievements〕Structure Analysis of Propane Hydrates　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Yukihiko Yoshida; Takeshi Matsukawa; and Toru Ishigaki
    JPS Conf. Proc., Sep. 2015, [Reviewed]
  • Crystal Structure of the Fe1-xSr2YCu2+xO6+δ Magnetic Superconductor　　　　　　　　　　　　　　　
    Takashi Mochiku; Yoshiaki; Hata; Akinori Hoshikawa; Toru Ishigaki; Hiroshi Yasuoka; and Kazuto Hirata
    JPS Conf. Proc., Sep. 2015, [Reviewed]
  • Crystal-Local Structure Analyses for Cathode LIBs LiNi1-xCoxO2 (0
    Dyah S. Adipranoto; Masao Yonemura; Yoshihisa Ishikawa; Akinori Hoshikawa; Toru Ishigaki; Takashi Kamiyama; Yoshiharu Uchimoto; Zempachi Ogumi
    JPS Conf. Proc., Sep. 2015, [Reviewed]
  • Local Lattice Distortion Caused by Short-range Charge Ordering in Transition Metal Oxides
    Katsuaki Kodama; Naoki Igawa; Shin-ichi Shamoto; Kazutaka Ikeda; Hidetoshi Ohshita; Naokatsu Kaneko; Toshiya Otomo; Kentaro Suzuya; Akinori Hoshikawa; and Toru Ishigaki, Cubic spinel compound LiMn$_2$O$_4$ with the mixed valence of Mn$^{3.5+}$ has non-metallic conductivity. The local structure determined by the PDF analysis has an orthorhombic lattice distortion and includes inequivalent Mn$^{3+}$ and Mn$^{4+}$ sites. YBaCo$_2$O$_5$ also exhibits non-metallic conductivity although the Co has the mixed valence of +2.5 above 220 K which corresponds with charge ordering temperature. The PDF obtained at 450 K is not reproduced by the PDF calculated for the averaged structure and can be reproduced by the PDF calculated for the structure model corresponding to the charge ordering state. These results suggest that the valence electrons are localized with short-range periodicity, resulting in the non-metallic conductivities in these materials.
    JPS Conf. Proc., Sep. 2015, [Reviewed]
  • Synthesis and transport properties of ternary type-I Si clathrate K8Al7Si39　　　　　　　　　　　　　　　
    S. K. Singh; T. Mochiku; S. Ibuka; Y. Isoda; A. Hoshikawa; T. Ishigaki and M. Imai
    Jpn. J. Appl. Phys., Aug. 2015, [Reviewed]
  • Neutron crystal structure analysis of stilbazolium derivatives for terahertz-wave generation　　　　　　　　　　　　　　　
    T. Matsukawa; Y. Yoshida; A. Hoshikawa; S. Okada; and T. Ishigaki
    CrystEngComm, Apr. 2015, [Reviewed]
  • Identification of Various Coexisting Phases in Superconducting and Non-superconducting Samples of RbxFe2-ySe2　　　　　　　　　　　　　　　
    Y. Kobayashi; S. Kototani; K. Ohishi; M. Itoh; A. Hoshikawa; T. Ishigaki; and M. Sato
    J. Phys. Soc. Jpn., Mar. 2015, [Reviewed]
  • 21aPS-107 ハニカム格子を形成するスピン系Li_3Ni_2AO_6 (A=Sb, Bi)の磁気ダイナミクスと磁気構造
    福井 皓人; 安井 幸夫; 星川 晃範; 石垣 徹; 井川 直樹, 一般社団法人日本物理学会
    日本物理学会講演概要集, 2015
  • New O2/P2-type Li-Excess Layered Manganese Oxides as Promising Multi-Functional Electrode Materials for Rechargeable Li/Na Batteries　　　　　　　　　　　　　　　
    Naoaki Yabuuchi; Ryo Hara; Masataka Kajiyama; Kei Kubota; Toru Ishigaki; Akinori Hoshikawa and Shinichi Komaba
    Adv. Energy Mater., Sep. 2014, [Reviewed]
  • Neutron diffraction studies on structural effect for Ni-doping in LiCo1-xNixO2
    Dyah S. Adipranotoa; Toru Ishigaki; Akinori Hoshikawa; Kenji Iwase; Masao Yonemura; Kazuhiro Mori; Takashi Kamiyama; Yukio Morii; Makoto Hayashi
    Solid State Ion., Sep. 2014, [Reviewed]
  • Slow dynamics in the geometrically frustrated magnet ZnFe2O4: Universal features of aging phenomena in spin glasses　　　　　　　　　　　　　　　
    H. Mamiya; N. Tsujii; N. Terada; S. Nimori; H. Kitazawa; A. Hoshikawa; and T. Ishigaki
    Phys. Rev. B, Jul. 2014, [Reviewed]
  • Local Structural Analysis by using Atomic Pair Distribution Function on Mixed Valence Compound LiMn2O4
    Katsuaki Kodama; Naoki Igawa; Shin-ichi Shamoto; Kazutaka Ikeda; Hidetoshi Ohshita; Naokatsu Kaneko; Toshiya Otomo; Kentaro Suzuya; Akinori Hoshikawa and Toru Ishigaki, LiMn$_2$O$_4$ has a cubic spinel structure with a single Mn site whose valence is +3.5. Below about 260 K, the compound exhibits a charge ordering and has inequivalent Mn sites with valences of +3 and +4. However, even in the cubic phase without the charge ordering, temperature dependence of the electrical conductivity is non-metallic. We have performed PDF (atomic pair distribution function) analysis on powder neutron diffraction data of LiMn$_2$O$_4$ obtained above 300 K where the compound has cubic structure. The local structure determined by PDF analysis has an orthorhombic lattice distortion and includes the inequivalent Mn sites with valences of +3 and +4 up to, at least, about 450 K. These results indicate that valence electrons are localized at Mn sites with short range periodicity, resulting in the non-metallic electrical conductivity. It can be regarded as a glass state of valence electrons whereas a charge ordering can be regarded as a crystallization of valence electrons.
    JPS Conf. Proc., Jun. 2014, [Reviewed]
  • New Perovskite-Related Structure Family of Oxide-Ion Conducting Materials NdBaInO4　　　　　　　　　　　　　　　
    Kotaro Fujii; Yuichi Esaki; Kazuki Omoto; Masatomo Yashima; Akinori Hoshikawa; Toru Ishigaki; and James R. Hester
    Chem. Mater., Apr. 2014, [Reviewed]
  • Spin State of Co3+ in LaCo1-xRhxO3 Investigated by Structural Phenomena
    Shinichiro Asai; Ryuji Okazaki; Ichiro Terasaki; Yukio Yasui; Wataru Kobayashi; Akiko Nakao; Kensuke Kobayashi; Reiji Kumai; Hironori Nakao; Youichi Murakami; Naoki Igawa; Akinori Hoshikawa; Toru Ishigaki; Outi Parkkima; Maarit Karppinen; Hisao Yamauchi
    J. Phys. Soc. Jpn., Nov. 2013, [Reviewed]
  • A Comparative Study of LiCoO2 Polymorphs: Structural and Electrochemical Characterization of O2-, O3-, and O4-type Phases　　　　　　　　　　　　　　　
    Naoaki Yabuuchi; Yuta Kawamoto; Ryo Hara; Toru Ishigaki; Akinori Hoshikawa; Masao Yonemura; Takashi Kamiyama; Shinichi Komaba
    Inorg. Chem., Jul. 2013, [Reviewed]
  • Annealing effect on structure and superconductivity in FeSr2YCu2O6+δ magnetic superconductor　　　　　　　　　　　　　　　
    T.Mochiku; Y.Hata; K.Yamaguchi; Y.Tsuchiya; A.Hoshikawa; K.Iwase; D.Sulistyanintyas; T.Ishigaki; H.Yasuoka; K.Hirata
    Physics Procedia, Jan. 2013, [Reviewed]
  • Structure Determination of Hydrogen-bonding Network of Water in Hydrophobic Nanospace by Neutron and X-ray Diffractions　　　　　　　　　　　　　　　
    Taku Iiyama; Fumika Fujisaki; Ryusuke Futamura; Atom Hamasaki; Sumio Ozeki; Akinori Hoshikawa; Toru Ishigaki
    Chem. Lett., Oct. 2012, [Reviewed]
  • Crystal structure of GdNi3 with superlattice alloy and its hydrogen absorption-desorption property
    Kenji Iwase; Kazuhiro Mori; Akinori Hoshikawa; Toru Ishigaki
    International Journal of Hydrogen Energy, Oct. 2012, [Reviewed]
  • Crystal and Local Structure of Lithium Cobalt Oxide Studied by Neutron Diffraction　　　　　　　　　　　　　　　
    Dyah S. Adipranoto; Toru Ishigaki; Akinori Hoshikawa; Kenji Wase; Hidetoshi Oguro; Masao Yonemura; Kazuhiro Mori; Takashi Kamiyama
    Solid State Ion.:Ionics for Sustainable World - Proceedings of the 13th Asian Conference., Jul. 2012, [Reviewed]
  • Application of matrix decomposition algorithms for singular matrices to the Pawley method in Z-Rietveld
    R. Oishi-Tomiyasu; M. Yonemura; T. Morishima; A. Hoshikawa; S. Torii; T. Ishigaki and T. Kamiyama
    J. Appl. Cryst., Apr. 2012, [Reviewed]
  • Hydrogenation and structural properties of Gd2Ni7 with superlattice structure
    Kenji Iwase; Kazuhiro Mori; Akinori Hoshikawa; Toru Ishigaki
    International Journal of Hydrogen Energy, Mar. 2012, [Reviewed]
  • Neutron diffraction study on the Xe behavior in clathrate hydrate analyzed by Rietveld/maximum entropy method
    N. Igawa; T. Taguchi; A. Hoshikawa; H Yamauchi; A Birumachi and Y Ishii
    IOP Conf. Ser.: Mater. Sci. Eng., Oct. 2011, [Reviewed]
  • Synthesis of New Compound Gd5Ni19 with a Superlattice Structure and Hydrogen Absorption Properties
    Kenji Iwase; Kazuhiro Mori; Akinori Hoshikawa; and Toru Ishigaki
    Inorg. Chem., Oct. 2011, [Reviewed]
  • Structural and Magnetic Properties of Dilute Spinel Ferrites: Neutron Diffractometry and Magnetometry Investigations　　　　　　　　　　　　　　　
    H. Mamiya; N. Terada; H. Kitazawa; A. Hoshikawa; T. Ishigaki
    Journal of Magnetics, Jun. 2011, [Reviewed]
  • Three-Dimensional Strain Model for Various Kinds of Nb3Sn Wires
    H. Oguro; S. Awaji; K. Watanabe; G. Nishijima; T. Ishigaki; A. Hoshikawa; K. Iwase; M. Yonemura; D.S. Adipranoto
    IEEE Transactions on Applied Superconductivity, Jun. 2011, [Reviewed]
  • Change in Crystal Structure of LiNi0.8Co0.19Cu0.01O2 Cathode during Charge of Coin Cell Observed by Ex Situ Time-of-flight Neutron Diffraction　　　　　　　　　　　　　　　
    Yasushi Idemoto; Yuta Tsukada; Naoto Kitamura; Akinori Hoshikawa; Toru Ishigaki
    Chem. Lett., Jan. 2011, [Reviewed]
  • 〔Major achievements〕Automatic sample changer for IBARAKI materials design diffractometer (iMATERIA)　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Toru Ishigaki; Masao Yonemura; Kenji Iwase; Hidetoshi Oguro; Dyah Sulistyanintyas; Takashi Kamiyama; Makoto Hayashi
    J. Phys. Conf. Ser., Dec. 2010, [Reviewed]
  • Low temperature structure of FeSr2YCu2O6+d magnetic superconductor
    T. Mochiku; Y. Hata; T. Wuernisha; N. Igawa; A. Hoshikawa; T. Ishigaki; H. Yasuoka; K. Hirata
    Physica C, Dec. 2010, [Reviewed]
  • On execution of Pawley method without requiring intensity constraints on overlapping reflections　　　　　　　　　　　　　　　
    R.Oishi-Tomiyasu; M. Yonemura; A. Hoshikawa; S.Torii; T. Ishigaki; T. Kamiyama
    Acta Cryst., Sep. 2010, [Reviewed]
  • CO2 motion in carbon dioxide deuterohydrate determined by applying maximum entropy method to neutron powder diffraction data
    N. Igawa; T. Taguchi; A. Hoshikawa; Hiroshi Fukazawa; Hiroki Yamauchi; Wataru Utsumi; Yoshinobu Ishii
    J. Phys. Chem. Solid., Jun. 2010, [Reviewed]
  • Effect of intervening structure between CuO2 sheets in heavily Fe-substituted high-Tc superconductor FeSr2YCu2O6+d　　　　　　　　　　　　　　　
    T.Mochiku; Y.Hata; T.Wuernisha; Y.Matsushita; Y.Katsuya; S.Ishimaru; M.Tanaka; K.Kobayashi; A.Hoshikawa; T. Ishigaki; H. Yasuoka; K. Hirata
    Physica C, Oct. 2009, [Reviewed]
  • Substitution effect in FeSr2YCu2O6+δ magnetic superconductor　　　　　　　　　　　　　　　
    Takashi Mochiku; Tuerxun Wuernisha; Yoshiaki Hata; Akinori Hoshikawa; Hijiri Kito; Hiroshi Yasuoka; Kazuto Hirata
    J. Phys. Conf. Ser., Mar. 2009, [Reviewed]
  • Existence of ferroelectric ice on planets-A neutron diffraction study　　　　　　　　　　　　　　　
    Hiroshi Fukazawa; Akinori Hoshikawa; Bryan C. Chakoumakos; Jaime A. Fernandez-Baca
    Nucl. Instr. Meth. Phys. Res. A, Feb. 2009, [Reviewed]
  • Rietveld analysis software for J-PARC
    R. Oishi; M.Yonemura; Y.Nishimaki; S.Torii; A.Hoshikawa; T.Ishigaki; T.Morishima; K. Mori; T.Kamiyama
    Nucl. Instr. Meth. Phys. Res. A, Feb. 2009, [Reviewed]
  • IBARAKI materials design diffractometer (iMATERIA)-Versatileneutron diffractometer at J-PARC
    T.Ishigaki; A.Hoshikawa; M.Yonemura; T.Morishima; T.Kamiyama; R.Oishi; K.Aizawa; T.Sakuma; Y.Tomota; M.Arai; M.Hayashi; K.Ebata; Y.Takano; K.Komatsuzaki; H.Asano; Y.Takano; T.Kasao
    Nucl. Instr. Meth. Phys. Res. A, Feb. 2009, [Reviewed]
  • 〔Major achievements〕Development of an automatic sample changer for iMATERIA
    A.Hoshikawa; T.Ishigaki; M.Nagai; Y.Kobayashi; H.Sagehashi; T.Kamiyama; M.Yonemura; K. Aizawa; T.Sakuma; Y.Tomota; M.Arai; M.Hayashi; K.Ebata; Y.Takano; T.Kasao
    Nucl. Instr. Meth. Phys. Res. A, Feb. 2009, [Reviewed]
  • Ferroelectric distortion and electronic structure in Bi4Ti3O12　　　　　　　　　　　　　　　
    Yuji Noguchi; Takashi Goto; Masaru Miyayama; Akinori Hoshikawa; Takashi Kamiyama
    J. Electroceram, Dec. 2008, [Reviewed]
  • Cation disorder and superconductivity in the Fe-based copper oxide FeSr2Y1-xNdxCu2O6+d　　　　　　　　　　　　　　　
    T. Wuernisha; T. Mochiku; Y. Hata; A. Hoshikawa; H. Fujii; H. Yasuoka; H. Kitazawa
    Physica C, Sep. 2008, [Reviewed]
  • Neutron diffraction study of Nd-substituted FeSr2YCu2O6+d magnetic superconductor　　　　　　　　　　　　　　　
    T. Mochiku; T. Wuernisha; Y. Hata; A. Hoshikawa; H. Fujii; H. Yasuoka; K. Hirata
    Physica C, Sep. 2008, [Reviewed]
  • Neutron diffraction studies of the magnetic ordering in the spinel oxide system MgxCo1-xCrxFe2-xO4
    S.M. Yunus; H. Yamauchi; A.K.M. Zakaria; N. Igawa; A. Hoshikawa; Yoshinori Haga and Yoshinobu Ishii
    J. Alloys and Comp., May 2008, [Reviewed]
  • Cation distribution and crystallographic characterization of the quaternary spinel system MgxCo1-xCrxFe2-xO4
    S.M. Yunus; H. Yamauchi; A.K.M. Zakaria; N. Igawa; A. Hoshikawa; Yoshinobu Ishii
    J. Alloys and Comp., Apr. 2008, [Reviewed]
  • 〔Major achievements〕In situ observation of CH4 hydrate growth by neutron powder diffraction　　　　　　　　　　　　　　　
    A. Hoshikawa; H. Fukazawa; N. Igawa; H. Yamauchi; Y. Ishi and T. Ishigaki
    Acta Cryst., Jan. 2008, [Reviewed]
  • Versatile IBARAKI materials design neutron diffractometer at J-PARC
    T. Ishigaki; A. Hoshikawa; M. Yonemura; T. Kamiyama; S. Harjo; K. Aizawa; T. Sakuma; Y. Tomota; Y. Morii; M. Arai; M. Hayashi; K. Ebata; Y. Takano; T. Kasao
    Zeitschrift fur Kristallographie, Supplement, 01 Dec. 2007
  • Neutron Diffraction Study on the Defect Structure of Ta-Substituted Zn2TiO4 Oxide Ion Conductors　　　　　　　　　　　　　　　
    Sigeomi Takai; Takayuki Shinohara; Akinori Hoshikawa; Stefanus Harjo; Kenichi Oikawa; Toru Ishigaki; Takashi Kamiyama and Takao Esaka
    J. Ceramic Soc. Jpn., Nov. 2007, [Reviewed]
  • Investigation of the Oxide Ion Conduction Mechanism in LaGaO3-Based Electrolytes through High-Temperature Neutron Powder Diffraction　　　　　　　　　　　　　　　
    M. Kajitani; M. Matsuda; A. Hoshikawa; T. Kamiyama; F. Izumi; M. Miyake
    Key Eng. Mat., Oct. 2007, [Reviewed]
  • Doping effect on crystal structure and conduction property of fast oxide ion conductor LaGaO3-based perovskite　　　　　　　　　　　　　　　
    M. Kajitani; M. Matsuda; A. Hoshikawa; S. Harjo; T. Kamiyama; T. Ishigaki; F. Izumi; M. Miyake
    J. Phys. Chem. Solid., May 2007, [Reviewed]
  • Magnetic structural characterization of Mg-Co-Cr ferrite by neutron diffraction
    S.M. Yunus; Hiroki Yamauchi; A.K.M. Zakaria; Naoki Igawa; Akinori Hoshikawa and Yoshinobu Ishii
    J. Mag. Mag. Mat., Mar. 2007, [Reviewed]
  • Correlation Of The Superconductivity With The Multi‐Stack Structure In MgB2‐Type Superconductor CaAlSi
    Hajime Sagayama; Yusuke Wakabayashi; Hiroshi Sawa; Takashi Kamiyama; Akinori Hoshikawa; Stefanus Harjo; Kentaro Uosato; Ajay K. Ghosh; Masashi Tokunaga; and Tsuyoshi Tamegai
    AIP Conf. Proc., Dec. 2006, [Reviewed]
  • Erratum to "Structural change in a series of protonated layered perovskite compounds, HLnTiO4 (Ln=La, Nd and Y)". [J. Solid State Chem. 179 (2006) 1892-1897] (DOI:10.1016/j.jssc.2006.03.015)
    Shunsuke Nishimoto; Motohide Matsuda; Stefanus Harjo; Akinori Hoshikawa; Takashi Kamiyama; Toru Ishigaki; Michihiro Miyake
    Journal of Solid State Chemistry, Nov. 2006, [Reviewed]
  • Multiferroic Behavior and Two dimensitonal Magnetism of Hexagonal Manganites　　　　　　　　　　　　　　　
    Seongsu Lee; Misun Kang; Changhee Lee; A. Hoshikawa; M. Yonemura; T. Kamiyama; J.-G. Park
    Physica B, Nov. 2006, [Reviewed]
  • Structure Phase Transition in FeSr2YCu2O6+δ Superconductor
    Tkashi Mochiku; Yoshiaki Hata; Kenji Iwase; Masao Yonemura; Stefanus Harjo; Akinori Hoshikawa; Kenichi Oikawa; Toru Ishigaki; Takashi Kamiyama; Hiroki Fujii; Fujio Izumi; Kazuo Kadowaki; Kazuto Hirata
    Physica B, Nov. 2006, [Reviewed]
  • Deuteron ordering in ice containing impurities: a neutron diffraction study
    Hiroshi Fukazawa; Akinori Hoshikawa; Hiroki Yamauchi; Yasuo Yamaguchi; Yoshinobu Ishii
    Physica B, Nov. 2006, [Reviewed]
  • Neutron diffraction study on protonated and hydrated layered perovskite
    Shunsuke Nishimoto; Motohide Matsuda; Stefanus Harjo; Akinori Hoshikawa; Takashi Kamiyama; Toru Ishigaki and Michihiro Miyake
    J. Solid State Chem., Nov. 2006, [Reviewed]
  • Existence of Ferroelectric Ice in the Universe
    H. Fukazawa; A. Hoshikawa; Y. Ishii; B. C. Chakoumakos; J. A. Fernandez-Baca
    ApJ., Nov. 2006, [Reviewed]
  • 〔Major achievements〕Neutron Powder Diffraction Study of Methane Hydrate by the Rietveld Refinement and Maximum Entropy Method
    Akinori Hoshikawa; Naoki Igawa; Hiroki Yamauchi; Yoshinobu Ishii
    Physica B, Nov. 2006, [Reviewed]
  • 〔Major achievements〕Observation of hydrogen in deuterated methane hydrate by maximum entropy method with neutron powder diffraction
    Akinori Hoshikawa; Naoki Igawa; Hiroki Yamauchi; Yoshinobu Ishii
    J. Chem. Phys., Jul. 2006, [Reviewed]
  • Two Types of Multistack Structures in MgB2-Type Superconductor CaAlSi　　　　　　　　　　　　　　　
    Hajime Sagayama; Yusuke Wakabayashi; Hiroshi Sawa; Takashi Kamiyama; Akinori Hoshikawa; Stefanus Harjo; Kentaro Uozato; Ajay K. Ghosh; Masashi Tokunaga and Tsuyoshi Tamegai
    J. Phys. Soc. Jpn., Apr. 2006, [Reviewed]
  • Doping effect on crystal structure of fast oxide ion conductor LaGaO 3-based perovskite compounds
    Masahiro Kajitani; Motohide Matsuda; Akinori Hoshikawa; Takashi Kamiyama; Fujio Izumi; Michihiro Miyake
    Key Engineering Materials, 2006, [Reviewed]
  • Structural change in a series of protonated layered perovskite compounds, HLnTiO4 (Ln=La, Nd and Y)　　　　　　　　　　　　　　　
    S. Nishimoto; M. Matsuda; S. Harjo; A. Hoshikawa; Takashi Kamiyama; Toru Ishigaki and Michihiro Miyake
    J. Solid State Chem, Jan. 2006, [Reviewed]
  • Structure determination of n=1 Ruddlesden Popper compound HLaTiO4 by powder neutron diffraction　　　　　　　　　　　　　　　
    S. Nishimoto; M. Matsuda; S. Harjo; A. Hoshikawa; Takashi Kamiyama; Toru Ishigaki and Michihiro Miyake
    J. Eur. Ceramic Soc., Jan. 2006, [Reviewed]
  • 〔Major achievements〕Neutron powder diffraction study of methane deuterohydrate by the maximum entropy method
    Akinori Hoshikawa; Naoki Igawa; Hiroki Yamauchi; Yoshinobu Ishii
    J. Phys. Chem. Solid., Oct. 2005, [Reviewed]
  • In Situ Neutron Diffraction Study on Fast Oxide Ion Conductor LaGaO3-Based Perovskite Compounds　　　　　　　　　　　　　　　
    Masahiro Kajitani; Motohide Matsuda; Akinori Hoshikawa; Stefanus Harjo; Takashi Kamiyama; Toru Ishigaki; Fujio Izumi; and Michihiro Miyake
    Chem. Mater., Aug. 2005, [Reviewed]
  • Formation and growth of ice XI: A powder neutron diffraction study
    Hiroshi Fukazawa; Akinori Hoshikawa; Hiroki Yamauchi; Yasuo Yamaguchi; Yoshinobu Ishii
    J. Crystal Growth, Aug. 2005, [Reviewed]
  • Direct observation of a coupling between spin, lattice and electric dipole moment in multiferroic YMnO3　　　　　　　　　　　　　　　
    S. Lee; A. Pirogov; J. H. Han; J.-G. Park; A. Hoshikawa; and T. Kamiyama
    Phys. Rev. B, May 2005, [Reviewed]
  • Time-Of-Flight Neutron Powder Diffraction Studies on a Chiral Two-Dimensional Molecule-Based Magnet
    Akinori Hoshikawa; Takashi Kamiyama; Agus Purwanto; Kazuki Ohishi; Wataru Higemoto; Toru Ishigaki; Hiroyuki Imai; Katsuya Inoue
    J. Phys. Soc. Jpn., Oct. 2004, [Reviewed]
  • Neutron diffraction and IR spectroscopy on mechanically alloyed La-substituted PbWO4　　　　　　　　　　　　　　　
    Shigeomi Takai; Tomohoro Nakanishi; Kenichi Oikawa; Shuki Torii; Akinori Hoshikawa; Takashi Kamiyama and Takao Esaka
    Solid State Ion., May 2004, [Reviewed]
  • Structure Phase Transition in FeSr2YCu2O6+d Superconductor
    Mochiku Takashi; Harjo Stefanus; Hoshikawa Akinori; Oikawa Kenichi; Ishigaki Toru; Kamiyama Takashi; Kadowaki Kazuo; Hirata Kazuto, FeSr2YCu2O6+δは、CuO2面を持つ高温超伝導体の類縁化合物であるが、単に大気中で合成されただけでは超伝導は発現されない。まず窒素雰囲気で、続いて酸素雰囲気でアニールすることにより、はじめて50 K程度の超伝導体となる。このアニール過程を通して、CuとFeのc軸方向の秩序配列が促進され、続いて酸素アニールにより還元されたFeOδ面上の酸素が補填される。しかしながら、上記の秩序配列とは異なる秩序配列を示す回折が観測され、超伝導化との関連が示唆されたため、高温その場中性子回折によって、アニール過程に沿って結晶構造解析を行い、これらの構造を検討した。, The Ceramic Society of Japan
    Preprints of Annual Meeting of The Ceramic Society of Japan
    Preprints of Fall Meeting of The Ceramic Society of Japan, 2004
  • Crystal structure analysis of -tricalcium phosphate Ca3(PO4)2 by neutron powder diffraction　　　　　　　　　　　　　　　
    Masatomo Yashima; Atsushi Sakai; Takashi Kamiyama and Akinori Hoshikawa
    J. Solid State Chem., Nov. 2003, [Reviewed]
  • Neutron Diffraction Study on Lanthanum Gallate Perovskite Compound Series　　　　　　　　　　　　　　　
    Masahiro Kajitani; Motohide Matsuda; Akinori Hoshikawa; Ken-ichi Oikawa; Shunki Torii; Takashi Kamiyama; Fujio Izumi; and Michihiro Miyake
    Chem. Mater., Sep. 2003, [Reviewed]
  • High-temperature phase transition in lanthanum titanate perovskite La0.64(Ti0.92,Nb0.08)O3　　　　　　　　　　　　　　　
    Masatomo Yashima; Mizuki Mori; Takashi Kamiyama; Ken-ichi Oikawa; Akinori Hoshikawa; Shuki Torii; Koh Saitoh and Kenji Tsuda
    Chem. Phys. Lett., Jun. 2003, [Reviewed]
  • Electrical transport in the spin-density-wave phase of (TMTSF-d(12))(2)ClO4
    A Hoshikawa; T Terazaki; N Matsunaga; K Nomura; M Watanabe; S Nakatsuji; J Yamada
    SYNTHETIC METALS, Mar. 2003, [Reviewed]
  • 〔Major achievements〕Non-linear electric conduction in the SDW phase of (TMTSF)2NO3
    A. Hoshikawa; T. Terazaki; K. Nomura; M. Tokumoto and J. M. Fabre
    Synth. Met., Mar. 2001, [Reviewed]
  • Collective mode of spin-density-wave in (TMTSF)(2)ClO4
    A Hoshikawa; K Nomura; S Takasaki; J Yamada; S Nakatsuji; H Anzai; M Tokumoto; N Kinoshita
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, May 2000, [Reviewed]
  • 〔Major achievements〕Collective Mode of Spin-Density-Wave in (TMTSF)2ClO4
    Akinori HOSHIKAWA; Kazushige NOMURA; Satoshi TAKASAKI; Jun-ichi YAMADA; Shin’ichi NAKATSUJI; Hiroyuki ANZAI; Madoka TOKUMOTO and Nobumori KINOSHITA
    J. Phys. Soc. Jpn., May 2000, [Reviewed]
  • 〔Major achievements〕Depinning of Spin-Density-Wave in (TMTSF)2ClO4
    Akinori HOSHIKAWA; Kazushige NOMURA; Satoshi TAKASAKI; Jun-ichi YAMADA; Shin’ichi NAKATSUJI; Hiroyuki ANZAI; Madoka TOKUMOTO and Nobumori KINOSHITA, Physical Society of Japan
    J. Phys. Soc. Jpn., Jan. 2000, [Reviewed]
  • 〔Major achievements〕Non-linear conductance in SDW phase of (TMTSF)2ClO4
    A. Hoshikawa; K. Nomura; S. Takasaki; J. Yamada; S. Nakatsuji; H. Anzai; M. Tokumoto; N. Kinoshita
    Synth. Met., Jun. 1999, [Reviewed]
  • 〔Major achievements〕Sliding of the spin-density wave in (TMTSF)2ClO4
    A. Hoshikawa; K. Nomura; T. Sambongi; S. Takasaki; J. Yamada; S. Nakatsuji; H. Anzai; M. Tokumoto and N. Kinoshita
    Synth. Met., Feb. 1997, [Reviewed]

MISC

  • 中性子回折実験：中性子回折実験のすすめ　　　　　　　　　　　　　　　
    星川晃範
    ぶんせき, Nov. 2021
  • J-PARCにおける粉末中性子回折装置　　　　　　　　　　　　　　　
    石垣 徹、米村 雅雄、星川 晃範、鳥居 周輝、神山 崇
    波紋, Feb. 2015, [Reviewed]
  • 〔Major achievements〕iMATERIAにおける自動試料交換搬送機構の開発　　　　　　　　　　　　　　　
    星川 晃範、石垣 徹、米村 雅雄
    波紋, Aug. 2013, [Reviewed]
  • J-PARCの物質・生命科学実験施設　　　　　　　　　　　　　　　
    池田 一貴・奥 隆之・鈴木 淳市・武田 全康・星川 晃範・三宅 康博
    工業材料, Aug. 2012
  • 25pPSB-43 Disordor and physical properties in FeSr_2YCu_2O_<б+δ>, magnetic superconductor
    Mochiku T.; Hata Y.; Hoshikawa A.; Iwase K.; Sulistyanintyas Dyah; Oguro H.; Ishigaki T.; Igawa N.; Tsuchiya Y.; Iwai H.; Yasuoka H.; Hirata K.
    Meeting abstracts of the Physical Society of Japan, 03 Mar. 2011
  • 茨城県材料構造解析装置の現状について　　　　　　　　　　　　　　　
    石垣 徹,星川 晃範,米村 雅雄,岩瀬 謙二,ディア スリスニ ンティアス,小黒 英俊,大石 亮子,森嶋 隆裕,森 一広,鬼柳 亮嗣, 茂筑 高士,神山 崇
    波紋, Jan. 2010, [Reviewed]
  • 24aYE-6 Phase transition of water ice under low temperature and low temperature
    Fukazawa Hiroshi; Yamauchi Hiroki; Igawa Naoki; Utsumi Wataru; Hoshikawa Akinori
    Meeting abstracts of the Physical Society of Japan, 29 Feb. 2008
  • 粉末回折装置の概要と構造科学・材料開発に与えるインパクト　　　　　　　　　　　　　　　
    石垣 徹; 星川晃範; 米村雅雄; 神山 崇; 鳥居周輝; 森嶋隆裕; 大石亮子
    日本結晶学会誌, Feb. 2008, [Reviewed]
  • 〔Major achievements〕Observation of Hydrogen in Methane Hydrate by Neutron Powder Diffraction　　　　　　　　　　　　　　　
    Akinori Hoshikawa
    J. Cryst. Soc. Jpn, Aug. 2007, [Reviewed], [Invited]
  • 19aPS-70 Magnetism and Structure of Impurity-Doped Rutile
    Mochiku T.; Hirata K.; Yamaki K.; Shimizu N.; Hoshikawa A.; Fujii H.; Yamada K.; Itoh S.; Kakeya I.; Kadowaki K.
    Meeting Abstracts of the Physical Society of Japan, 2007
  • 中性子回折によるメタンハイドレートの精密構造解析
    井川直樹; 星川晃範; 石井慶信
    日本中性子科学会誌「波紋」, Apr. 2006, [Reviewed]
  • Crystal structures and photocatalytic properties of protonated layered perovskite compounds
    Nishimoto Shunsuke; Matsuda Motohide; Harjo Stefanus; Hoshikawa Akinori; Kamiyama Takashi; Ishigaki Toru; Miyake Michihiro
    Preprints of Annual Meeting of The Ceramic Society of Japan
    Preprints of Fall Meeting of The Ceramic Society of Japan, 2006
  • Structure and physical properties of impurity-doped TiO2
    Mochiku Takashi; Fujii Hiroki; Ohnuma Masato; Yamada Katsura; Itoh Shinji; Kadowaki Kazuo; Hirata Kazuto; Yamaki Kazuhiro; Shimizu Natsumi; Hoshikawa Akinori; Wuernisha Tuerxun; Shikanai Fumihito; Mori Kazuhiro; Ishigaki Toru; Kamiyama Takashi
    Preprints of Annual Meeting of The Ceramic Society of Japan
    Preprints of Fall Meeting of The Ceramic Society of Japan, 2006
  • 25aYK-11 Structure analysis of methane hydrates by neutron powder diffraction
    Hoshikawa Akinori; Igawa Naoki; Yamauchi Hiroki; Ishii Yoshinobu
    Meeting abstracts of the Physical Society of Japan, 04 Mar. 2005
  • Crystal structure and oxide ion conduction property of lanthanum gallate perovskite compounds
    Kajitani Masahiro; Matsuda Motohide; Hoshikawa Akinori; Stefanus Harjo; Kamiyama Takashi; Ishigaki Toru; Izumi Fujio; Miyake Michihiro
    Preprints of Annual Meeting of The Ceramic Society of Japan
    Preprints of Fall Meeting of The Ceramic Society of Japan, 2005
  • Structural Analyses of Protonated Layered Perovskites, HLnTiO4 ( Ln = La, Nd and Y ), by Neutron Diffraction
    NISHIMOTO Shunsuke; MATSUDA Motohide; HARJO Stefanus; HOSHIKAWA Akinori; KAMIYAMA Takashi; ISHIGAKI Toru; MIYAKE Michihiro
    Preprints of Annual Meeting of The Ceramic Society of Japan
    Preprints of Fall Meeting of The Ceramic Society of Japan, 2005
  • Synthesis and Structure of New Layered Perovskite Compounds, HxNa1-xLaTiO4yH2O
    NISHIMOTO Shunsuke; MATSUDA Motohide; HARJO Stefanus; HOSHIKAWA Akinori; KAMIYAMA Takashi; ISHIGAKI Toru; MIYAKE Michihiro
    Preprints of Annual Meeting of The Ceramic Society of Japan
    Preprints of Fall Meeting of The Ceramic Society of Japan, 2005
  • 〔Major achievements〕Maximum entropy method analysis of neutron powder diffraction patterns of methane deuterohydrates　　　　　　　　　　　　　　　
    Akinori Hoshikawa; Naoki Igawa; Hiroki Yamauchi; Yoshinobu Ishii
    Proceedings of the Fifth International Conference on Gas Hydrates, Jan. 2005
  • 〔Major achievements〕二次元キラルフェリ磁性体の磁気構造
    星川晃範
    日本中性子科学会誌「波紋」, Oct. 2004, [Reviewed]
  • Neutron Diffraction during Thermal-Martensitic Transformation of Biocompatible Ti-Nb-Sn Alloy
    HARJO Stefanus
    材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Mar. 2004
  • 30pXC-9 Correlation of the superconductivity with the super lattice structure in MgB_2 type superconductor CaAlSi
    Sagayama H; Wakabayashi Y; Sawa H; Hoshikawa A; Harjo S.; Kamiyama T; Toki M; Uosato K; Ghosh A. K.; Tokunaga M; Tamegai T
    Meeting Abstracts of the Physical Society of Japan, 2004

Courses

  • Quantum Beam Applied Analysis　　　　　　　　　　　　　　　
    Ibaraki University

Affiliated academic society

  • 2017 - Present, The Japanese Society of Snow and Ice
  • 2016 - Present, The Japan Institute of Energy
  • The Crystallographic Society of Japan
  • The Japanese Society for Neutron Science

Research Themes