論文

• Shiori Kihara, Yuki Sakai, Shogo Wakazaki, Takumi Nishikubo, Takehiro Koike, Ko Mibu, Hongwu Yu, Yoichi Okimoto, Shin-ya Koshihara, Masaki Azuma. Bi_0.5Pb_0.5FeO₃ with Unusual Pb Charge Disproportionation: Indication of a Systematic Charge Distribution Change in Bi_0.5Pb_0.5MO₃ (M: 3d Transition Metal), Inorganic Chemistry, 61, 32, 12822-12827, Aug. 2022.
• Teppei Nagase, Takumi Nishikubo, Masayuki Fukuda, Yuki Sakai, Kei Shigematsu, Yoichi Ikeda, Yusuke Nambu, Zhang Qiang, masaaki matsuda, Kou Mibu, Masaki Azuma, Takafumi Yamamoto. SrV_0.3Fe_0.7O_2.8: A Vacancy-Ordered Fe-Based Perovskite Exhibiting Room-Temperature Magnetoresistance, Inorganic Chemistry, Vol. 61, No. 24, pp. 8987-8991, June 2022.  公式リンク  
  
• Xubin Ye, Jianfa Zhao, Hena Das, Denis Sheptyakov, Junye Yang, Yuki Sakai, Hajime Hojo, Zhehong Liu, Long Zhou, Lipeng Cao, Takumi Nishikubo, Shogo Wakazaki, Cheng Dong, Xiao Wang, Zhiwei Hu, Hong-Ji Lin, Chien-Te Chen, Christoph Sahle, Anna Efiminko, Huibo Cao, Stuart Calder, Ko Mibu, Michel Kenzelmann, Liu Hao Tjeng, Runze Yu, Masaki Azuma, Changqing Jin, Youwen Long. Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3, Nature Communications, 12, 1917, Mar. 2021.
• Xubin Ye, Jianfa Zhao, Hena Das, Denis Sheptyakov, Junye Yang, Yuki Sakai, Hajime Hojo, Zhehong Liu, Long Zhou, Lipeng Cao, Takumi Nishikubo, Shogo Wakazaki, Cheng Dong, Xiao Wang, Zhiwei Hu, Hong-Ji Lin, Chien-Te Chen, Christoph Sahle, Anna Efiminko, Huibo Cao, Stuart Calder, Ko Mibu, Michel Kenzelmann, Liu Hao Tjeng, Runze Yu, Masaki Azuma, Changqing Jin, Youwen Long. Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3, Nature Communications, 12, 1917, Mar. 2021.
• 東 正樹, 重松 圭, 北條 元, 壬生 攻. BiFe_1-xCo_xO₃薄膜のスピン構造変化~電場による磁化の反転に成功、次世代低消費電力磁気メモリ実現の道拓く~, 文部科学省ナノテクノロジープラットホーム, 13, 4, 2021.
• Kei Shigematsu, Haruki Shimizu, Marin Katsumata, Keisuke Shimizu, Hajime Yamamoto, Ko Mibu, Masaki Azuma. Stable electric polarization switching accompanied by magnetization reversal in B-site-substituted multiferroic BiFe_0.9Co_0.1O₃ thin films, APPLIED PHYSICS EXPRESS, 13, 7, June 2020.
• Keisuke Shimizu, Ryo Kawabe, Hajime Hojo, Haruki Shimizu, Hajime Yamamoto, Marin Katsumata, Kei Shigematsu, Ko Mibu, Yu Kumagai, Fumiyasu Oba, Masaki Azuma. Direct Observation of Magnetization Reversal by Electric Field at Room Temperature in Co-Substituted Bismuth Ferrite Thin Film, NANO LETT., Vol. 19, No. 3, pp. 1767–1773, Jan. 2019.
• Kei Shigematsu, Takeshi Asakura, Hajime Yamamoto, Keisuke Shimizu, Marin Katsumata, Haruki Shimizu, Yuki Sakai, Hajime Hojo, Ko Mibu, Masaki Azuma. Room temperature ferromagnetism in BiFe_1-xMn_xO₃ thin film induced by spin-structure manipulation, Applied Physics Letters., Vol. 112, p. 192905, May 2018.
• H.Hojo, R.Kawabe, K.Shimizu, H. Yamamoto, K.Mibu, K.Samanta, T.Saha-Dasgupta, M.Azuma. Ferromagnetism at Room Temperature Induced by Spin Structure Change in BiFe₁-_xCo_xO₃ Thin Films, Advanced materials, Vol. 29, No. 9, p. 1603131, Mar. 2017.
• Hajime Hojo, Ryo Kawabe, Keisuke Shimizu, Hajime Yamamoto, Ko Mibu, Kartik Samanta, Tanusri Saha‐Dasgupta, Masaki Azuma. Ferromagnetism at Room Temperature Induced by Spin Structure Change in BiFe₁− _xCo_xO₃ Thin Films, Advanced Materials, Vol. 29, No. 9, pp. 1603131-1～1603131-7, Dec. 2016.
• Hajime Yamamoto, Takumi Kihara, Kengo Oka, Tokunaga Masashi, Ko Mibu, Masaki Azuma. Spin Structure Change in Co-Substituted BiFeO₃ , Journal of the Physical Society of Japan, Vol. 85, pp. 064704-1-4, May 2016.

国際会議発表 (査読有り)

• Kei Shigematsu, Keisuke Shimizu, Ryo Kawabe, Hajime Hojo, Haruki Shimizu, Marin Katsumata, Hajime Yamamoto, Ko Mibu, Masaki Azuma. Magnetization Reversal in BiFe_0.9Co_0.1O₃ Thin films 1 -Spin Structure and Magnetization Reversal by Electric Field at Room Temperature in Co-Substituted Bismuth Ferrite Thin Film, 2022 MRS FALL MEETING, 2022.
• Masaki Azuma, Kei Shigematsu, Keisuke Shimizu, Takuma Ito, Marin Katsumata, Keita Ozawa, Hajime Hojo, Ko Mibu. MAGNETIZATION REVERSAL BY ELECTRIC FIELD AT ROOM TEMPERATURE IN Co SUBSTITUTED BISMUTH FERRITE THIN FILM, International Materials Research Congress 2022, 2021.
• M. Azuma, H. Hojo, R. Kawabe, K. Shimizu, H. Yamamoto, K. Mibu, K. Samanta, T. Saha-Dasgupta. Room temperature ferromagnetism in Co substituted BiFeO₃ induced by spin structure change, Indo-US Bilateral Workshop on Physics and Chemistry of Oxides: Theory meets Experiment, Jan. 2017.

国内会議発表 (査読有り)

• 劉 丘民, 西久保 匠, 酒井 雄樹, ヘナ ダス, 壬生 攻, 尾上 智子, 川上 隆照, 町田 晃彦, 綿貫 徹, 東 正樹. PbFeO₃の圧力誘起相転移, 日本セラミックス協会2023年年会, 2023.
• 長瀬 鉄平, 西久保 匠, 重松 圭, 東 正樹, 山本 隆文, 壬生 攻, 南部 雄亮, 池田 陽一, 松田 雅昌. (111)面に酸素欠損が秩序化したペロブスカイト型酸化物の合成・同定, 日本セラミックス協会 2022年年会, 2022.
• 東 正樹, 清水啓佑, 勝俣真綸, 小澤慶太, 重松 圭, 北條 元, 壬生 攻. Co置換BiFeO₃薄膜における電場印加磁化反転, ナノ討論会, 2021.

国際会議発表 (査読なし・不明)

• K. Shigematsu, T. Asakura, H. Yamamoto, K. Shimizu, M. Katsumata, H. Shimizu, Y. Sakai, H. Hojo, K. Mibu, M. Azuma. Room temperature ferromagnetism in BiFe1−xMnxO3 thin film induced by spin-structure manipulation, iLIM-3, Sept. 2018.

国内会議発表 (査読なし・不明)

• 長瀬鉄平, 西久保匠, 酒井雄樹, 重松圭, 東正樹, 山本隆文, 壬生攻, 南部雄亮, 池田陽一, 松田 雅昌. 酸素欠損型ペロブスカイトSrV_0.3Fe_0.7O_2.8における磁気抵抗効果, 日本セラミックス協会 第35回秋季シンポジウム, 2022.
• 浅倉 武志, 山本 孟, 清水 啓佑, 重松 圭, 北條 元, 壬生 攻, 東 正樹. BiFe1-xMn xO3のスピン構造変化, 応用物理学会, Mar. 2017.
• 浅倉武志, 山本孟, 清水啓佑, 重松圭, 北條元, 壬生攻, 東正樹. BiFe1-xMn xO3のスピン構造変化, 第55回セラミックス基礎科学討論会, Jan. 2017.

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