Journal Paper

• Shogo Wakazaki, Qiumin Liu, Randy Jalem, Takumi Nishikubo, Yuki Sakai, Naoki Matsui, Guowei Zhao, Kota Suzuki, Kei Shigematsu, Takafumi Yamamoto, Ryoji Kanno, Hena Das, Yoshitaka Tateyama, Masaki Azuma. High-Pressure Synthesis and Lithium-Ion Conduction of Li₄OBr₂ Derivatives with a Layered Inverse-Perovskite Structure, Chemistry of Materials, 33, 23, 9194-9201, Nov. 2021.
• Shogo Wakazaki, Qiumin Liu, Randy Jalem, Takumi Nishikubo, Yuki Sakai, Naoki Matsui, Guowei Zhao, Kota Suzuki, Kei Shigematsu, Takafumi Yamamoto, Ryoji Kanno, Hena Das, Yoshitaka Tateyama, Masaki Azuma. High-Pressure Synthesis and Lithium-Ion Conduction of Li4OBr2 Derivatives with a Layered Inverse-Perovskite Structure, Chemistry of Materials 2021, 33, 23, Nov. 2021.
• Hajime Yamamoto, Terutoshi Sakakura, Harald O. Jeschke, Noriyuki Kabeya, Kanata Hayashi, Yuya Ishikawa, Yutaka Fujii, Shunji Kishimoto, Hajime Sagayama, Kei Shigematsu, Masaki Azuma, Akira Ochiai, Yukio Noda, Hiroyuki Kimura. Quantum spin fluctuations and hydrogen bond network in the antiferromagnetic natural mineral henmilite, Physical Review Materials, 5, 104405, Oct. 2021.
• Kazumasa Miyazaki, Masayuki Ochi, Takumi Nishikubo, Jinya Suzuki, Takashi Saito, Takashi Kamiyama, Kazuhiko Kuroki, Takafumi Yamamoto, Masaki Azuma. High-Pressure and High-Temperature Synthesis of Anion-Disordered Vanadium Perovskite Oxyhydrides, Inorganic Chemistry, American Chemical Society, Vol. 60, No. 20, pp. 15751-15758, Oct. 2021.  Official location  
• Marin Katsumata, Kei Shigematsu, Takuma Itoh, Haruki Shimizu, Keisuke Shimizu, Masaki Azuma. Stabilization of correlated ferroelectric and ferromagnetic domain structures in BiFe_0.9Co_0.1O₃ films, Applied Physics Letters, 119, 132901, Sept. 2021.
• Keisuke Shimizu, Hajime Hojo, Masaki Azuma. Enhanced Piezoelectric Response in Orientation-Controlled BiFe_1–xGa_xO₃ Thin Films with Polarization Rotation, Acs Applied Electronic Materials, 3, 10, 4459-4464, Sept. 2021.
• Lei Hu, Yingcai Zhu, Yue-Wen Fang, Masayuki Fukuda, Takumi Nishikubo, Zhao Pan, Yuki Sakai, Shogo Kawaguchi, Hena Das, Akihiko Machida, Tetsu Watanuki, Shigeo Mori, Koshi Takenaka, Masaki Azuma. Origin and Absence of Giant Negative Thermal Expansion in Reduced and Oxidized Ca₂RuO₄, Chemistry of Materials, 33, 19, Sept. 2021.
• Masayuki Fukuda, Ikuya Yamada, Hajime Hojo, Chihiro Takahashi, Yuya Yoshida, Katsuhisa Tanaka, Masaki Azuma, Koji Fujita. Topochemical synthesis of perovskite-type CuNb₂O₆ with colossal dielectric constant, Journal of Materials Chemistry C, 9, 39, 1398-13990, Aug. 2021.
• Masaki Azuma, Hajime Hojo, Kengo Oka, Hajime Yamamoto, Keisuke Shimizu, Kei Shigematsu, Yuki Sakai. Functional Transition Metal Perovskite Oxides with 6s² Lone Pair Activity Stabilized by High-Pressure Synthesis, Annual Review of Materials Research, 51, 329-349, May 2021.
• Takahiro Ogata, Yuki Sakai, Takumi Nishikubo, Takashi Mizokawa, Masaichiro Mizumaki, Koomok Lee, Qiumin Liu, Masaki Azuma. Intermetallic Charge Transfer in V-Substituted PbCrO₃, Inorganic Chemistry, 60, 13, 9427-9431, Apr. 2021.
• Masaki Azuma. 巨大負熱膨張セラミックス, 金属, 91, 4, 43-48, Apr. 2021.
• Masaki Ozeki, Victoria Warne-Lang, Hirofumi Tsukasaki, Naoyuki Katayama, Yoshihiko Okamoto, Shigeo Mori, Koshi Takenaka, Masaki Azuma, Hajime Hojo, Kengo Oka, Hajime Yamamoto, Keisuke Shimizu, Kei Shigematsu, Yuki Sakai. Functional Transition Metal Perovskite Oxides with 6s2 Lone Pair Activity Stabilized by High-Pressure Synthesis, Annual Review of Materials Research, Annual Review of Materials Research, 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.
• 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.
• Masaki Azuma, Yuki Sakai, Takumi Nishikubo, 岡 研吾, 山本 孟. 圧力誘起相転移を利用した巨大負熱膨張物質の開発, 高圧力の科学と技術, 30, 3, Jan. 2021.  Official location  
• Yukimasa Fukada, Ryota Fukuyama, Kosuke Fujiwara, Kenji Yoshii, Kei Shigematsu, Masaki Azuma, Naoshi Ikeda. Analysis of Glass Behavior of Lu₂Fe₃O₇ with Distributed Equivalent Circuit Model, Journal of the Physical Society of Japan, 90, 024710, Jan. 2021.
• Zhao Pan, Mao-Hua Zhang, Takumi Nishikubo, Yuki Sakai, Hajime Yamamoto, Hajime Hojo, Masayuki Fukuda, Lei Hu, Hayato Ishizaki, Satoru Kaneko, Shogo Kawaguchi, Jurij Koruza, Jürgen Rödel, Masaki Azuma. Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na_1/2Bi_1/2V_1–xTi_xO₃ Piezoceramics, Acs Applied Materials & Interfaces, 13, 4, 5208-5215, Jan. 2021.  Official location  
• Masaki Azuma, Kei Shigematsu, 北條 元, Kou Mibu. 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~, NanotechJapan Bulletin, 13, 4, 2021.

International Conference (Reviewed)

• Lei Hu, Koshi Takenaka, Masaki Azuma. Origin and Absence of Giant Negative Thermal Expansion in Ca₂RuO₄, STAC12, 2021.
• Jinya Suzuki, Takafumi Yamamoto, Masaki Azuma, Takumi Nishikubo. Single crystal growth of perovskite oxyhydride under high pressure, STAC12, 2021.
• Shiori Kihara, Shogo Wakazaki, Yuki Sakai, Takumi Nishikubo, Masaki Azuma. Charge distribution change in perovskite Bi_0.5Pb_0.5MO₃ (M=3d transition metal), STAC12, 2021.
• Koomok Lee, Keita Ozawa, Hena Das, Masaki Azuma. Theoretical investigations of the origin of canted ferromagnetism in Co doped BiFeO₃ multife, STAC12, 2021.
• Liu Qiu Min, Shogo Wakazaki, Takumi Nishikubo, Kei Shigematsu, Takafumi Yamamoto, Naoki Matsui, Kota Suzuki, Ryoji Kanno, Randy Jalem, Yoshitaka Tateyama, Masaki Azuma. Structure change and Li-ion conductivity of layered anti-perovskite Li₄OBr_2-xI_x, STAC12, 2021.
• 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.
• Masaki Azuma. Giant Negative Thermal Expansion Materials Derived from Pressure Induced Phase Transitions, ACHPR, 2021.
• Kei Shigematsu, Keita Ozawa, Marin Katsumata, Masaki Azuma. Observation of ferroelectric and ferromagnetic domains of BiFe_0.9Co_0.1O₃ nanodot array by using anodic porous alumina mask, MATERIALS RESEARCH MEETING(MRM)2021, 2021.

Domestic Conference (Reviewed)

• 西久保 匠, 今井 孝, Yuki Sakai, 水牧 仁一朗, 大和田 謙二, 町田 晃彦, 綿貫 徹, 押目 典宏, 島田 歩, 菅原 健人, 久留島 康輔, Shigeo Mori, 溝川 貴司, Masaki Azuma. PbVO₃ の圧力下巨大体積変化を活かした負熱膨張設計と分域構造の観察, 日本物理学会, 2021.
• Takuya Ohmi, Masaki Azuma, Takafumi Yamamoto. 有機-無機ハイブリッド層状ペロブスカイト(MA)₂PbI_2−xBr_x(SCN)₂の合成と構造、光学特性, 第5回固体化学フォーラム研究会, 2021.
• Yuki Sakai, 西久保匠, 若崎翔吾, 木原汐里, Masaki Azuma. ペロブスカイト型酸化物 Bi_0.5Pb_0.5MO₃ の電荷分布, 第5回固体化学フォーラム研究会, 2021.
• Yuki Sakai, 松 野 夏 奈, 西 久 保 匠, 森 茂 生, 中 島 宏, 久 留島 康 輔, 町 田 晃 彦, 綿 貫 徹, Masaki Azuma. PbCrO₃ の立 方 晶 ― 立方 晶 転 移 に お け る 局 所構 造 の 変 化, 日本結晶学会令和３年度年会, 2021.
• Kei Shigematsu, Masaki Azuma. Direct Observation of Magnetization Reversal by Polarization Switching inMultiferroic Cobalt-Substituted Bismuth Ferrite Thin Film, 8th International Congress on Ceramics(ICC8), 2021.
• 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.
• Takuma Ito, 勝俣 真綸, Kei Shigematsu, Masaki Azuma. 強誘電性・強磁性が共存するBiFe_0.9Co_0.1O₃薄膜のtrailing fieldを用いたドメイン制御, 強誘電体会議FMA38, 2021.
• Shiori Kihara, Yuki Sakai, Masaki Azuma, 西久保 匠, 若崎 翔吾. ペロブスカイトBi_0.5Pb_0.5MO₃(M=3d遷移金属)の電荷分布変化, 日本セラミックス協会秋季シンポジウム, 2021.
• Koomok Lee, Kei Shigematsu, Masaki Azuma. 酸化物基板上へのInSbエピタキシャル薄膜の製作, 応用物理学会秋季学術講演会, 2021.
• Takuya Ohmi, Tomoaki Miura, Tadaaki Ikoma, Masaki Azuma, Takafumi Yamamo. Structural Transition and Photophysical Properties of Mixed-Anion Layered Perovskite: (MA)₂Pb(SCN)₂I_2-xBr_x (0 ≤ x < 1.6), STAC12, 2021.
• Koomok Lee, Kei Shigematsu, Masaki Azuma. Fabric of Epitaxial INSb Thin Film on Various Perovskite Oxide Substrates, 応用物理学会秋季学術講演会, 2021.
• 西久保 匠, Yuki Sakai, 水牧 仁一朗, 今井 孝, Masaki Azuma. 巨大な体積変化を伴う負熱膨張物質の設計, 高圧討論会, 2021.
• Masaki Azuma, 西久保 匠, Yuki Sakai, 山本 孟, 岡 研吾. Bi,Pb-3d 遷移金属ペロブスカイトの圧力誘起相転移と負熱膨張, 高圧討論会, 2021.
• Takuya Ohmi, 三浦智明, 生駒忠昭, Masaki Azuma, Takafumi Yamamoto. 層状ハイブリッドペロブスカイト(MA)₂PbI_2−xBr_x(SCN)₂の構造相転移と温度安定, 粉体粉末冶金秋季大会, 2021.
• Takuma Itoh, 勝俣 真綸, Kei Shigematsu, Masaki Azuma. マルチフェロイックBiFe_0.9Co_0.1O₃ 薄膜におけるtrailing fieldを用いた強誘電 性 ・強磁性ストライプドメイン形成と制御, 粉体粉末冶金秋季大会, 2021.
• Masaki Azuma, 岡 研吾, 山本 孟, Yuki Sakai. 巨大負熱膨張材料の研究, 粉体粉末冶金秋季大会, 2021.
• 西久保 匠, Yuki Sakai, Lalitha K.V., Jürgen Rödel, Masaki Azuma. 分極・歪みによるBiInO₃-BiZn_1/2Ti_1/2O₃の負熱膨張と強弾性の制御, 結晶学会, 2021.
• Masaki Azuma. 巨大負熱膨張材料を用いた熱膨張制御, ニューセラミックス懇話会第245回研究会, 2021.

International Conference (Not reviewed / Unknown)

• Takuya Ohmi, Tomoaki Miura, Tadaaki Ikoma, Masaki Azuma, Takafumi Yamamoto. Structural Transition and Photophysical Properties of Mixed–Anion Layered Perovskite (MA)₂PbI_2–xBr_x(SCN)₂, International Conference on Mixed-Anion Compounds（ICMAC）, 2021.
• Takuma Itoh, Marin Katsumata, Kei Shigematsu, Masaki Azuma. Control of ferromagnetic and ferroelectric domains in BiFe_0.9Co_0.1O₃ thin films by utilizing trailing fields, IEEE ISAF2021, 2021.

Domestic Conference (Not reviewed / Unknown)

• Yuki Sasahara, Ryota Shimizu, Norimasa Nishiyama, Masaki Azuma, Taro Hitosugi. エピタキシャル薄膜技術を活用したCaSiO3ペロブスカイトの大気圧下回収の検討, 第62回高圧討論会, Oct. 2021.
• Yuki Sasahara, Ryota Shimizu, Norimasa Nishiyama, Masaki Azuma, Taro Hitosugi. エピタキシャル安定化による高圧相ペロブスカイト型CaSiO3の大気圧下回収, 第82回応用物理学会秋季学術講演会, Sept. 2021.
• Yuki Sasahara, Ryota Shimizu, Norimasa Nishiyama, Masaki Azuma, Taro Hitosugi. 大気圧下不安定な高圧相ペロブスカイト型CaSiO3のエピタキシャル安定化による大気圧下回収, 第5回固体化学フォーラム研究会, June 2021.
• Takuya Ohmi, 三浦智明, 生駒忠昭, Masaki Azuma, Takafumi Yamamoto. 有機–無機ハイブリッド層状ペロブスカイト(MA)₂PbI_2−xBr_x(SCN)₂の構造相転移と光学特性, 日本セラミックス協会秋季シンポジウム, 2021.

Patent

• Masaki Azuma, Hajime Yamamoto. 圧電体. Patent. Published. 国立大学法人東京工業大学, 地方独立行政法人神奈川県立産業技術総合研究所（KISTEC）. 2020/03/13. 特願2020-044500. 2021/09/24. 特開2021-143114. 2021.
• Masaki Azuma. 負熱膨張性材料の製造方法. Patent. Published. 国立大学法人東京工業大学, 地方独立行政法人神奈川県立産業技術総合研究所（KISTEC）. 2019/12/06. 特願2019-220914. 2021/06/10. 特開2021-088495. 2021.
• Masaki Azuma, Kei Shigematsu, Keisuke Shimizu. 積層体. Patent. Published. 国立大学法人東京工業大学, 地方独立行政法人神奈川県立産業技術総合研究所（KISTEC）. 2019/09/25. 特願2019-174070. 2021/04/01. 特開2021-050116. 2021.
• Masaki Azuma. 樹脂組成物およびその樹脂成形体. Patent. Registered. 国立大学法人東京工業大学, キヤノン株式会社, 地方独立行政法人神奈川県立産業技術総合研究所（KISTEC）. 2019/07/23. 特願2019-135114. 2021/02/15. 特開2021-017514. 特許第7351477号. 2023/09/19 2023.

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