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2024年

論文 / Original Papers & Conference Paper

  1. Influence of long- and short-range chemical order on spontaneous magnetization in single-crystalline Fe0.6Al0.4 compound thin films
    Kentaro Toyoki, Daigo Kitaguchi, Yu Shiratsuchi and Ryoichi Nakatani
    Journal of Physics, Condensed Matter., Vol. 36, pp. 135805 (10 pp) (2024).

  2. Strain-induced specific orbital control in a Heusler-alloy-based interfacial multiferoics
    Jun Okabayashi, Takamasa Usami, Amran Mahfudh Yatmeidhy, Yuichi Murakami, Yu Shiratsuchi, Ryoichi Nakatani, Yoshihiro Gohda, and Kohei Hamaya
    NPG Asia Materials, Vol. 16, pp. 3 (10 pp) (2024).[Press Release]

表彰 / Awards

  1. 2023年度日本鉄鋼協会・日本金属学会 関西支部 材料物性工学談話会 優秀講演賞
    鮫島 寛生
  2. 2023年度日本鉄鋼協会・日本金属学会 関西支部 材料物性工学談話会 優秀講演賞
    中村 圭伸
  3. 第27回 半導体におけるスピン工学の基礎と応用(PASPS-27) 優秀ポスター賞
    鮫島 寛生

2023年

論文 / Original Papers & Conference Paper

  1. Direct observation and stochastic analysis on thermally activated nucleation and growth of individual magnetic domain
    Fangfei Luo, Kentaro Toyoki, Chiharu Mitsumata, Jiaqi Shen, Ryoichi Nakatani, and Yu Shiratsuchi
    Journal of Magnetism and Magnetic Materials, Vol. 587, pp. 171228 (9 pp) (2023).

  2. Direct observation of antiferromagnetic domains and field-induced reversal in Pt/Cr2O3/Pt epitaxial trilayer
    Kakeru Ujimoto, Hiroki Sameshima, Kentaro Toyoki, Takahiro Moriyama, Kohji Nakamura, Yoshinori Kotani, Ryoichi Nakatani,and Yu Shiratsuchi
    Applied Physics Letters, Vol. 123, pp. 022407 (7 pp) (2023) .

  3. Magnetic interaction in superparamagnetic Co-Pt nanoparticles synthesized in protein crystal
    Kakeru Tagata, Daisuke Kanda, Naoto Kobayashi, Akifumi Higashiura, Satoshi Ichikawa, Noriaki Kishida, Ryoichi Nakatani, Atsushi Nakagawa, and Yu Shiratsuchi
    IEEE Transaction on Magnetics, Vol. 59, Issue 11, pp. 2300105 (5 pp) (2023).

  4. Gate-induced switching of perpendicular exchange bias with very low coercivity in Pt/Co/Ir/Cr2O3/Pt thin film
    Hirofumi Ekawa, Jiaqi Shen, Kentaro Toyoki, and Ryoichi Nakatani, Yu Shiratsuchi
    Applied Physics Letters, Vol. 122, pp. 063404 (7 pp) (2023).

  5. Anomalous Hall effect in Pt/Al-doped Cr2O3 epitaxial film
    Ion Iino, Tatsuo Tada, Kentaro Toyoki, Ryoichi Nakatani and Yu Shiratsuchi
    AIP Advances, Vol. 13, pp. 013035 (6 pp) (2023).

  6. Peculiar temperature depenence of magneto-optic Kerr rotation associated with antiferromagnetic-paramagnetic toransition
    Hirofumi Ekawa, Takashi Okano, Oujin Huang, Ion Iino, Kentaro Toyoki, Ryoichi Nakatani, Takeshi Kato, and Yu Shiratsuchi
    Japanese Journal of Applied Physics, Vol.62, pp. SB1002 (6 pp) (2023).

  7. Frequency dependence of coercivity in Nickel and Co-Fe-B thin film for DC to 100 kHz region
    Kentaro Toyoki, Shunya Matsui, Yu Shiratsuchi, Yasushi Endo and Ryoichi Nakatani
    Japanese Journal of Applied Physics, Vol.62, pp. SB1008 (6 pp) (2023).

  8. Converse magnetoelectic effect coefficient greater than 10-6 s/m in perpendicularly magnetized Co/Pd multilayers on Pb(Mg1/3Nb2/3)O3-PbTiO3
    Takamasa Usami, Yuma Sanada, Yu Shiratsuchi, Shinya. Yamada, Takeshi Kanashima, Ryoichi Nakatani and Kohei Hamaya
    Journal of Magnetism and Magnetic Materials, Vol. 570, pp. 170532 (6 pp) (2023).

  9. Metastable Co3Mn/Fe/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures
    Y. Murakami, T. Usami, R. Watarai, Y. Shiratsuchi, T. Kanashima, R. Nakatani, Y. Gohda and K. Hamaya
    Journal of Applied Physics, Vol. 134, pp. 224101 (10 pp) (2023).

  10. Finite size effect and dimensional crossover in antiferromagnetic epitaxial Cr2O3 thin films
    Hiroki Sameshima, Kakeru Ujimoto, Rou Tsutsumi, Kentaro Toyoki, Ryoichi Nakatani, and Yu Shiratsuchi
    2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers).

  11. Growth and magnetoelectric effect of epitaxial Co3Mn films on piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3(001)
    Yuichi Murakamu, Takamasa Usami, Yu Shiratsuchi, Yuya Sanada, Shinya Yamada, Ryoichi Nakatani and Kohei Hamaya
    2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers).

  12. Chemical order, unit cell volume, and spontaneous magnetization in vapor-quenched single crystalline Fe0.6Al0.4 alloy thin film
    Kentaro Toyoki, Daigo Kitaguchi, Yu Shiratsuchi and Ryoichi Nakatani
    2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers).

書籍 / Books

  1. スピントロニクスハンドブック、(株)エヌ・ティー・エス、ISBN978-4-86043-842-5 C3050
    白土 優(分担執筆)

表彰 / Awards

  1. 日本金属学会第81回功績賞
    白土 優
  2. 日本磁気学会2023年度学生講演賞(桜井講演賞)
    田形 翔

2022年

論文 / Original Papers

  1. Increase of Néel temperature of magnetoelectric Cr2O3 thin film by epitaxial lattice matching
    Xunrui Wang, Kakeru Ujimoto, Kentaro Toyoki, Ryoichi Nakatani and Yu Shiratsuchi
    Applied Physics Letters, Vol. 121, pp. 182404 (6 pp) (2022).
    https://aip.scitation.org/doi/full/10.1063/5.0116968

  2. Synthesis of superparamagnetic Co–Pt nanoparticle in Pyrococcus furiosus virus-like particle crystal
    Makoto Taniguchi, Akifumi Higashiura, Naoto Kobayashi, Daisuke Kanda, Kakeru Tagata, Ryota Fukunishi, Yasunori Yoshikawa, Emi Kuromatsu, Noriaki Kishida, Yoshinori Kotani, Kentaro Toyoki, Tetsuya Nakamura, Ryoichi Nakatani, Atsushi Nakagawa, Yu Shiratsuchi
    Journal of Physics and Chemistry of Solids, Vol. 169, pp. 110840 (6 pp) (2022).
    https://doi.org/10.1016/j.jpcs.2022.110840

  3. Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi
    Shumpei Fujii, Takamasa Usami, Yu Shiratsuchi, Ireene Azaceta, Adam Krrigan, Amran Mahfudh Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Vlado K. Lazarov, Tamio Oguchi, Yoshihiro Gohda, and Kohei Hamaya
    NPG Asia Materials, Vol. 14, pp. 43(11 pp) (2022).
    https://doi.org/10.1038/s41427-022-00389-1

  4. Low pressure drive of domain wall in Pt/Co/Au/Cr2O3/Pt thin film by magnetoelectric effect
    Jiaqi Shen, Tatsuo Tada, Kentaro Toyoki, Yoshinori Kotani, Ryoichi Nakatani, and Yu Shiratsuchi
    Applied Physics Letters, Vol. 120, pp. 092404(6 pp) (2022).
    https://doi.org/10.1063/5.0083202

  5. Magentic-field and temperature dependence of anomalous Hall effect in Pt/Cr2O3/Pt trilayer
    Xinrui Wang, Kentaro Toyoki, Ryoichi Nakatani, and Yu Shiratsuchi
    AIP Advances, Vol. 12, pp. 035216(5 pp) (2022).
    https://doi.org/10.1063/9.0000253

  6. Converse magnetoelectric effect in epitaxial Co2MnSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures: Comparison of L21- and B2-orderd Co2MnSi
    Takamasa Usami, Shumpei Fujii, Shinya Yamada, Yu Shiratsuchi, Takeshi Kageshima, Ryoichi Nakatani and Kohei Hamaya
    IEEE Tranaction on Magnetics, Vol. 58, Art N0.2501505, (2022).
    https://doi.org/10.1109/TMAG.2022.3145521

  7. Significant effect of interfacial spin moment in ferromagnet-semiconductor heterojunction on spin transport in a semiconductor
    Takahiro Naito, Rintaro Nishimura, Michihiro Yamada, Akira Masago, Yu Shiratsuchi, Yuya Wagatsuma, Kentaro Sawano, Ryoichi Nakatani, Tamio Oguchi and Kohei Hamaya
    Physical Review B, Vol. 105, Art N0.195308, (2022).
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.195308

  8. 電気磁気反強磁性体材料の電圧駆動磁壁ダイナミクス
    白土 優,豊木研太郎,中谷亮一
    日本磁気学会会報「まぐね」,Magnetics Japan,Vol. 17, No. 5, pp. 241-248 (2022).

  9. 磁気抵抗効果測定によるC11b Cr-Al薄膜の磁気構造の検討
    井口 颯太,藤原 壮甫,豊木 研太郎,白土 優,中谷 亮一
    電気情報通信学会,信学技報(IEICE Technical Report), MRIS2022-6, 1-4, (2022).

表彰 / Awards

  1. 2022年度日本鉄鋼協会・日本金属学会 関西支部 材料物性工学談話会 優秀講演賞
    氏本 翔

2021年

論文 / Original Papers

  1. Dominant carrier of pseudo gap antiferromagnet Cr3Al thin film
    Kentaro Toyoki, Masayuki Hayashi, Shunsuke Hamaguchi, Shotaro Harimoto, Yu Shiratsuchi, Takafumi Ishibe, Yoshiaki Nakamura, and Ryoichi Nakatani
    Physica B: Physics of Condesed Matter, Vol. 620, pp. 413281 (8 pp) (2021).

  2. Temperature lag with the onset of exchange bias, superparamagnetic blocking and antiferromagnetic ordering in ultrathin ferromagnet/antiferromagnet thin film
    Yu Shiratsuchi, Yiran Tao, Rou Tsutsumi, Kentaro Toyoki and Ryoichi Nakatani
    Journal of Applied Physics, Vol. 130, Issue 19, pp. 193902 (2021)

  3. Structural, magnetic, and electric properties of Pt/Co/Au/Cr2O3/Pt thin film with Cr2O3 layer below 25 nm
    Yu Shiratsuchi (corr. author), Janqi Shen, Yiran Tao, Kohei Takahara, Kentaro Toyoki and Ryoichi Nakatani
    Journal of Magnetics Society of Japan, Vol. 45, No. 4, pp. 101-105 (2021).

  4. Magnetic Properties and Magnetic Domain Observation of Nd-Fe-B Sintered Magnets Treated by Grain Boundary Diffusion Process with Dy-Al Co-Sorption
    Masaru Uenohara, Hiroaki Nishio, Kentaro Toyoki, Yu Shiratsuchi, Ryoichi Nakatani and Ken-ichi Machida
    Materials Transaction, Vol. 62, No. 8, pp. 1216 - 1224 (2021).

  5. Effect of Fe atomic layers on the ferromagnet-semiconductor interface on temperature-dependent spin transport in semiconductors
    Michihiro Yamada, Yu Shiratsuchi, H. Kambe, Kohei Kudo, Shinya Yamada, Kentarou Sawano, Ryoichi Nakatani, and Kohei Hamaya
    Journal of Applied Physics, Vol. 129, pp. 183901(7 pp) (2021).
  6. Giant magnetoelectric effect in an L21-ordered Co2FeSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructure
    T. Usami, S. Fujii, Y. Shiratsuchi, R. Nakatatani and K. Hamaya
    Applied Physics Letters, Vol. 118, 42402 (5pp) (2021).

  7. Magnetoelectric control of antiferromagnetic domain state in Cr2O3 thin film [Topical Review]
    Yu Shiratsuchi, Kentaro Toyoki and Ryoichi Nakatani
    J. Phys. Condens. Matter, Vol. 33, pp. 243001 (18pp) (2021).

  8. Magnetoelectric Induced Switching of Perpendicular Exchange Bias Using 30-nm-Thick Cr2O3 Thin Film [Selected as Journal issue cover]
    Yu Shiratsuchi, Yiran Tao, Kentaro Toyoki and Ryoichi Nakatani
    Magnetochemistry, Vol. 7, pp. 36(10 pp) (2021).

2020年

論文 / Original Papers

  1. Robust magnetic domain in Pt/Co/Au/Cr2O3/Pt stacked film with perpendicular exchange bias
    Yu Shiratsuchi, Saori Yoshida, Hiroaki Yoshida, Yoshinori Kotani, Kentaro Toyoki, Chiharu Mitsumata, Ryoichi Nakatani and Tetsuya Nakamura
    Journal of Applied Physics, Vol. 127, Issue 15, pp. 153902(7 pp) (2020).

  2. Giant anomalous Hall conductivity at Pt/Cr2O3 interface
    Takahiro Moriyama , Yu Shiratsuchi, Tatsuya Iino, Hikaru Aono, Motohiro Suzuki, Tetsuya Nakamura, Yoshinori Kotani, Ryoichi Nakatani, Kohji Nakamura, and Teruo Ono
    Physical Review Applied, Vol. 13, No. 3, pp.034052(8 pp) (2020).

  3. Realization of magnetoelectric effect in 50-nm-thick Cr2O3 thin film
    Yu Shiratsuchi, Kentaro Toyoki, Tao Yiran, Hikaru Aono and Ryoichi Nakatani
    Applied Physics Express, Vol. 13, pp. 043003(4 pp) (2020)

  4. Critical behavior of perpendicular exchange bias in Pd/Co/Pt/Cr2O3/Pd stacked films
    Yu Shiratsuchi, Motohiro Suzuki, Kentaro Toyoki, Kohei Wakatsu, Takashi Nishimura, Tetsuya Nakamura and Ryoichi Nakatani
    Physica B: Physics of Condesed Matter, Vol. 583, pp. 412052 (5pp) (2020).

  5. Magnetic properties of Co film in Pt/Co/Cr2O3/Pt structure
    Thi Van Anh Nguyen, Yu Shiratsuchi, Hideo Sato, Shoji Ikeda, Tetsuo Endoh, and Yasushi Endo
    AIP Advances, Vol. 19, 015152(6 pp) (2020).

  6. Regeneration of perpendicular exchange bias in high temperature regime in Pt/Co/Au/Cr2O3/Pt stacked films
    Yu Shiratsuchi, Daisuke Tokunaga and Ryoichi Nakatani
    Japanese Journal of Applied Physics, Vol. 59,SEEF02 (7 pp) (2020).

2019年

論文 / Original Papers

  1. Enhancement of perpendicular exchange bias by introducing twin boundary in Pt/Co/α-Cr2O3/α-V2O3 epitaxial film
    Yu Shiratsuchi, Saori Yoshida, Satoshi Onoue, Chiharu Mitsumata, Nobuhito Inami, Tetsuro Ueno, Kanta Ono and Ryoichi Nakatani
    Materials Transactions, Vol. 60, No. 9, pp. 2028 - 2032 (2019).

  2. Resistive detection of the Néel temperature of Cr2O3 thin film
    Tatsuya Iino, Takahiro Moriyama, Hiroyuki Iwaki, Hikaru Aono, Yu Shiratsuchi and Teruo Ono
    Applied Physics Letters, Vol. 114, pp. 022402 (2019).

  3. Quantitative identification of constituent phases in a Nd-Fe-B-Cu sintered magnet and temperature dependent change of electron density of Nd2Fe14B studied by synchrotron X-ray diffraction
    Hiroyuki Okazaki, David Billington, Naruki Tsuji, Wakana Ueno, Yoshinori Koatani, Shogo Kawaguchi, Kunihisa Sugimoto, Kentaro Toyoki, Tomoki Fukunaga, Takeshi Nishiuchi, Kazuhiro Hono, Satoshi Hirosawa and Tetsuya nakamura
    Acta Materialia, Vol. 181, pp. 530-536 (2019).

  4. Temperature dependent magnetization reversal process of a Ga-doped Nd-Fe-B sintered magnet based on first-order reversal curve analysis
    Satoshi Okamoto, Kazunori Miyazawa, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono, Yukio Takada, Takashi Sato, Yuji Kaneko, Akira Kato
    Acta Materialia, Vol. 181, pp. 530-536 (2019).

  5. Microscopic origin of large perpendicular magnetic anisotropy in an FeIr/MgO system
    Shinji Miwa, Takayuki Nozaki, Masahito Tsujikawa, Motohiro Suzuki, Takuya Tsukahara, Takeshi Kawabe, Yoshinori Kotani, Kentaro Toyoki, Minori Goto, Tetsuya Nakamura, Masafumi Shirai, Shinji Yuasa, and Yoshishige Suzuki
    Physical Review B, Vol. 99, pp. 184421 (2019).

  6. First-order reversal curve analysis of a Nd-Fe-B sintered magnet with soft X-ray magnetic circular dichroism microscopy
    Kazunori Miyazawa, Satoshi Okamoto, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono
    Acta Materialia, Vol. 162, pp. 1-9 (2019).

表彰 / Awards

  1. 第69回 日本金属組織写真賞 奨励賞「走査型軟X線磁気円二色性顕微鏡によるNd-Fe-B焼結磁石破断面の磁場下磁区観察」
    豊木 研太郎(平成22年卒) 高輝度光科学研究センター(現 マテリアル生産科学専攻、マテリアル科学コース 中谷研究室 助教)

2018年

論文 / Original Papers

  1. Frustration and relaxation of antiferromagnetic domains reversed by magneto-electric field cooling [Editor's Pick]
    Yu Shiratsuchi, Shunsuke Watanabe, Shogo Yonemura, Tatsuo Shibata and Ryoichi Nakatani
    AIP Advances, Vol. 8, Issue 12 (2018) 125313.

  2. Antiferromagnetoic domain wall creep driven by magnetoelectric effect
    Yu Shiratsuchi, Hiroaki Yoshida, Yoshinori Kotani, Kentaro Toyoki, Thi Van Anh Nguyen, Tetsuya Nakamura and Ryoichi Nakatani
    APL Materials, Vol. 6, (2018) 121104.

  3. Obsevation of the magnetoelectric reversal process of the antiferromagnetic domain
    Yu Shiratsuchi, Shunsuke Watanabe, Hiroaki Yoshida, Noriaki Kishida, Ryoichi Nakatani, Yoshinori Kotani, Kentaro Toyoki and Tetsuya Nakamura
    Applied Physics Letters, Vol. 113, Issue 24 (2018) 242404.

  4. Energy condition of isothermal magnetoelectric switching of perpendicular exchange bias in Pt/Co/Au/Cr2O3/Pt stacked films [Editor's Pick]
    Thi Van Ahn Nguyen, Yu Shiratsuchi, Shogo Yonemura, Tatsuo Shibata and Ryoichi Nakatani
    Journal of Applied Physics, Vol. 123, Issue 23 (2018) 233902.

  5. Development of scanning soft X-ray microscipe for magnetic imaging under high magnetic fields
    Yoshinori Kotani, Yasunori Senba, Kentaro Toyoki, David Billington, Hiroyuki Okazaki, Akira Yasui, Wakana Ueno, Haruhiko Ohashi, Satoshi Hirosawa, Yu Shiratsuchi and Tetsuya Nakamura
    Journal of Synchrotron Raddiation, Vol. 25 (2018) 1444.

  6. Determination of specific ion position of Cr3+ and O2- in Cr2O3 thin film and their relationship to exchange anisotropy at Co/Cr2O3 interface
    Yu Shiratsuchi, Yuuta Nakano, Nobuhito Inami, Tetsuro Ueno, Kanta Ono, Reiji Kumai, Ryoko Sagayama and Ryoichi Nakatani
    Journal of Applied Physics, Vol. 123 (2018) 103903.

  7. Magnetoelectric control of antiferromagnetic domain state of Cr2O3 thin film toward spintronic application
    Yu Shiratsuchi and Ryoichi Nakatani
    Journal of Magnetics Society of Japan, Vol. 42, No. 6 (2018) 119.

  8. Stabke contrast mode on TiO2(110) surface with metal-coated tip using AFM
    Y. J. Li, H. Wen, Q. Zhang, Y. Adachi, E. Arima, Y. Kinoshita, H. Nomura, Z. Ma, L. Kou, Y. Tsukuda, Y. Naitoh, Y. Sugawara, R. Xu and Z. Cheng
    Ultramicroscopy, Vol. 191 (2018) 51.

2017年度以前はこちら

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