Organization
Integrated Center for Science and Humanities Mathematics, Information and Statistical Science Area Professor
Title
Professor
HIRAKI Koichi
Degree
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博士 (理学) ( 総合研究大学院大学 )
Research Interests
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Solid state physics, magnetic resonance
Research Areas
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Natural Science / Magnetism, superconductivity and strongly correlated systems
Research History
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Fukushima Medical University Integrated Center for Science and Humanities Professor
2018.4 - Now
Professional Memberships
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Physical Society of Japan
Qualification acquired
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Hazardous Material Handler (first kind)
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Person in Charge of High-pressure Gas Production Security (chemical machinery and frozen machine)
Papers
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Field-Induced Criticality in YbCu4Au
T. Taniguchi, K. Osato, H. Okabe, T. Kitazawa, M. Kawamata, S. Hashimoto, Y. Ikeda, Y. Nambu, D. P. Sari, I. Watanabe, J. G. Nakamura, A. Koda, J. Gouchi, Y. Uwatoko, S. Kittaka, T. Sakakibara, M. Mizumaki, N. Kawamura, T. Yamanaka, K. Hiraki, T. Sasaki, and M. Fujita
Journal of the Physical Society of Japan 93 ( 12 ) 124706 2024.12
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Change of superconducting character in UTe 2 induced by magnetic field
K. Kinjo, H. Fujibayashi, S. Kitagawa, K. Ishida, Y. Tokunaga, H. Sakai, S. Kambe, A. Nakamura, Y. Shimizu, Y. Homma, D. X. Li, F. Honda, D. Aoki, K. Hiraki, M. Kimata, and T. Sasaki
Physical Review B 107 L060502 2023.2
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Sari D.P., Asih R., Hiraki K.I., Nakano T., Nozue Y., Ishii Y., Hillier A.D., Watanabe I.
Physical Review B 104 ( 22 ) 2021.12（ ISSN:24699950 ）
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Nodal-line semimetal HMTSF-TCNQ: Anomalous orbital diamagnetism and charge density wave
Ozaki S., Tateishi I., Matsuura H., Ogata M., Hiraki K.
Physical Review B 104 ( 15 ) 2021.10（ ISSN:24699950 ）
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Ambient-pressure Dirac electron system in the quasi-two-dimensional molecular conductor α-(BETS)2 I3
Kitou S., Tsumuraya T., Sawahata H., Ishii F., Hiraki K.I., Nakamura T., Katayama N., Sawa H.
Physical Review B 103 ( 3 ) 2021.1（ ISSN:24699950 ）
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Hiraki K.I., Takahashi T., Akiba H., Nishio Y., Zhou B.
Crystals 10 ( 11 ) 1 - 7 2020.11
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Spin Dynamics in the Mixed Stack Charge Transfer Complex, (BEDO-TTF)(Cl2TCNQ)
Ko-ichi HIRAKI, Masashi Takahashi, TOshihiro TAKAHASHI, Ryusuke KONDO, Tatsuo Hasegawa, Seiichi KAGOSHIMA
the Journal of the Physical Society of Japan 89 074706-01 - 074706-04 2020.6
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Sari D.P., Rui N., Hiraki K.I., Nakano T., Hagiwara M., Nozue Y., Kusakawa T., Hori A., Watanabe I., Ishii Y.
Key Engineering Materials 860 KEM 137 - 141 2020.1
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<sup>13</sup>C NMR study on α-(BETS)<sub>2</sub>I<sub>3</sub> under an in-plane magnetic field
Sekine T., Kishida N., Sunami K., Miyagawa K., Hiraki K., Kato R., Kanoda K.
Meeting Abstracts of the Physical Society of Japan 75 ( 0 ) 1560 - 1560 2020
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Magnetic study of the lower critical field of organic superconductor λ-(Bets)2gacl4
Sari D., Hiraki K., Nakano T., Hagiwara M., Nozue Y., Kusakawa T., Hori A., Yamamoto A., Watanabe I., Ishii Y.
Materials Science Forum 966 MSF 296 - 301 2019.1
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NMR Evidences for the coupling between conduction electrons and molecular degrees of freedom in the exotic member of the Bechgaard salt, (TMTSF)2FSO3
H. Satsukawa, A. Yajima, K. Hiraki, T. Takahashi, H. Kang, Y-J. Jo, W. Kang and O. H. Chung
Journal of the Physical Society of Japan 85 ( 12 ) 124710-1 - 124710-9 2016.12
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Antiferromagnetic ordering in quasi triangular localized spin system,beta'-Et2Me2P[Pd(dmit)2]2, studied by 13C NMR
HIRAKI KO-ICHI, K. Otsuka, H. Iikubo, T. Kogure, Y. Takano, K. Hiraki, T. Takahashi, H. Cui and R. Kato
Journal of Physical Society of Japan 83 054712 2014
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Pressure-temperature phase diagram of (DI-DCNQI)2Ag based on 13C NMR
HIRAKI KO-ICHI, T. Itou, K. Miyagawa, J. Nakamura, K. Kanoda, K. Hiraki and T. Takahashi
Physical Review B 90 045126 2014
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NMR 概論-MRI を理解するために-
開 康一
日本大学医学部一般教育研究紀要 ( 41 ) 1 - 13 2013
Books
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原理がわかると視点がかわる 医療系の物理
清 裕一郎 （第7章 磁気共鳴画像法）
共立出版 2024.3
Presentations
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NMR study of one-dimensional molecular conductor, HMTSF-TCNQ
2024.11
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YbCu4Auの高磁場電子状態
日本物理学会2024年春季大会 2024.3
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NMR study on two-band one-dimensional electronic system, HMTSF-TCNQ
2023.12
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13C-NMR study of aipha-(BETS)2I3 under parallel magnetic field
Annual meeting of the Physical Society of Japan 78 2023.9
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UTe2における強磁場下の125Te-NMR
日本物理学会2022年秋季大会 2022.9
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127I-NQR法による分子性導体α-(BEDT-TTF)2I3の電荷秩序の観測
日本物理学会2021年度秋季大会
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(DI-DCNQI)2Cu の圧力下13C NMR
日本物理学会第69回年次大会
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有機導体_-(BEDT-TSeF)2I3 単結晶の13C-NMR II
日本物理学会第69回年次大会
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擬一次元導体HMTSF-TCNQのSe-NMR研究
日本物理学会2014年度秋季大会
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Site-Selective NMR Study on an Organic-Inorganic Hybrid Compound (DI-DCNQI)2Cu with p-d Mixing Controlled by Pressure
The International Conference on Strongly Correlated Electron Systems (SCES2014)
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Site-Selective NMR Study on an Organic-Inorganic Hybrid Compound (DI-DCNQI)2Cu with p-d Mixing Controlled by Pressure
The International Conference on Strongly Correlated Electron Systems (SCES2014)
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Se-NMR study on a quasi-one dimensional conductor, HMTSF-TCNQ
Se-NMR study on a quasi-one dimensional conductor, HMTSF-TCNQ
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q-(BEDT-TTF)2CsZn(SCN)4の13C-NMR測定
日本物理学会2014年度秋季大会
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NMR study on l-BETS2FeCl4 at low magnetic field
NMR study on l-BETS2FeCl4 at low magnetic field
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l-BETS2FeCl4の低磁場領域でのNMR研究
日本物理学会2014年度秋季大会
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b’-Pd(dmit)2 系の反強磁性相における磁気構造III
日本物理学会第69回年次大会
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b-Me4N[Pd(dmit)2]2の圧力下における13C-NMR測定IV
日本物理学会2014年度秋季大会
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13C-NMR study on b'-(Me4)N[Pd(dmit)2]2 under pressure IV
13C-NMR study on b'-(Me4)N[Pd(dmit)2]2 under pressure IV
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13C-NMR study of q-(BEDT-TTF)2CsZn(SCN)4
13C-NMR study of q-(BEDT-TTF)2CsZn(SCN)4
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_-d 系有機導体(DI-DCNQI)2Cu の高圧下におけるNMR 研究
日本物理学会2013年秋季大会
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The magnetic structure in antiferromagnetic state of frustrated spin systems, b' -Et2Me2P[Pd(dmit)2]2 and b' -Me4P[Pd(dmit)2]2
International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2013, 14-19jul2013, Montreal, Canada)
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The magnetic structure in antiferromagnetic state of frustrated spin systems, b' -Et2Me2P[Pd(dmit)2]2 and b' -Me4P[Pd(dmit)2]2
International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2013, 14-19jul2013, Montreal, Canada)
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Se-NMR study on _-type BETS based Field Induced Superconductor
International Symposium on Crystalline Organic Metals, Superconductors and Magnets
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Se-NMR study on _-type BETS based Field Induced Superconductor
International Symposium on Crystalline Organic Metals, Superconductors and Magnets
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Coupling between conduction p-electrons and anion permanent electric dipoles in (TMTSF)2FSO3 under pressure
International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2013, 14-19jul2013, Montreal, Canada)
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Coupling between conduction p-electrons and anion permanent electric dipoles in (TMTSF)2FSO3 under pressure
International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2013, 14-19jul2013, Montreal, Canada)
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b’-Pd(dmit)2 系の反強磁性相における磁気構造II
日本物理学会第65回年次大会
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A possible zero-gap-state in a-(BEDT-TSF)2I3, isostructural with a-(BEDT-TTF)2I3
International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2013, 14-19jul2013, Montreal, Canada)
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A possible zero-gap-state in a-(BEDT-TSF)2I3, isostructural with a-(BEDT-TTF)2I3
International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2013, 14-19jul2013, Montreal, Canada)