Enhanced Spontaneous Polarization by V4+ Substitution in a Lead-Free Perovskite CaMnTi₂O₆, Masayuki Fukuda, Takumi Nishikubo, Zhao Pan, Yuki Sakai, Mao-Hua Zhang, Shogo Kawaguchi, Hongwu Yu, Yoichi Okimoto, Shin-ya Koshihara, Mitsuru Itoh, Jürgen Rödel, and Masaki Azuma, Inorg. Chem. 2020, 59, 16, 11749–11756

Stabilized Charge, Spin, and Orbital Ordering by the 6s2 Lone Pair in Bi_0.5Pb_0.5MnO₃, Shogo Wakazaki, Takumi Nishikubo, Yuki Sakai, Kei Shigematsu, Hena Das, Depei Zhang, Qiang Zhang, Masaaki Matsuda, and Masaki Azuma, Inorg. Chem. 2020, 59, 18, 13390–13397

Sequential Spin State Transition and Intermetallic Charge Transfer in PbCoO₃, Zhehong Liu, Yuki Sakai, Junye Yang, Wenmin Li, Ying Liu, Xubin Ye, Shijun Qin, Jinming Chen, Stefano Agrestini, Kai Chen, Sheng-Chieh Liao, Shu-Chih Haw, Francois Baudelet, Hirofumi Ishii, Takumi Nishikubo, Hayato Ishizaki, Tatsuru Yamamoto, Zhao Pan, Masayuki Fukuda, Kotaro Ohashi, Kana Matsuno, Akihiko Machida, Tetsu Watanuki, Saori I. Kawaguchi, Angel M. Arevalo-Lopez, Changqing Jin, Zhiwei Hu, J. Paul Attfield, Masaki Azuma & Youwen Long. J. Am. Chem. Soc. 2020, 142, 12, 5731–5741

Doping-induced in-plane anisotropy of bond-stretching phonon softening in oxychloride Ca_2−xCuO₂Cl₂ compounds, Blair W. Lebert, Hajime Yamamoto, Masaki Azuma, Rolf Heid, Satoshi Tsutsui , Hiroshi Uchiyama, Alfred Q. R. Baron, Benoît Baptiste, and Matteo d’Astuto, PHYSICAL REVIEW B 101, 020506(R) (2020)

Polar–Nonpolar Phase Transition Accompanied by Negative Thermal Expansion in Perovskite-Type Bi_1–xPb_xNiO₃, Yuki Sakai, Takumi Nishikubo, Takahiro Ogata, Hayato Ishizaki, Takashi Imai, Masaichiro Mizumaki, Takashi Mizokawa Orcid, Akihiko Machida, Tetsu Watanuki, Keisuke Yokoyama, Yoichi Okimoto, Shin-ya Koshihara, Hena Das and Masaki Azuma, Chem. Mater.2019, 31, 13, 4748-4758

Strain Manipulation of Magnetic Anisotropy in Room-Temperature Ferrimagnetic Quadruple Perovskite CeCu₃Mn₄O_12,  Kei Shigematsu, Keisuke Shimizu, Kazumasa Yamamoto, Takumi Nishikubo, Yuki Sakai, Sergey A. Nikolaev, Hena Das, and Masaki Azuma, ACS Appl. Electron. Mater 2019, 1, 12, 2514-2521

Frustrated magnetic interactions in an S = 3/2 bilayer honeycomb lattice compound Bi₃Mn₄O₁₂(NO₃), M. Matsuda , S. E. Dissanayake, D. L. Abernathy, Y. Qiu J. R. D. Copley, N. Kumada, M. Azuma, Phys. Rev. B 100, 134430

Melting of d_xy orbital ordering accompanied by suppression of giant tetragonal distortion and insulator to metal transition in Cr substituted PbVO_3, Takahiro Ogata, Yuki Sakai, Hajime Yamamoto, Satyanarayan Patel, Jurij Koruza, Zhao Pan, Takumi Nishikubo, Jürgen Rödel, and Masaki Azuma, Chem. Mater. 2019, 31, 4, 1352–1358

Hydrothermal Synthesis of Pyrochlore-Type Pentavalent Bismuthates Ca₂Bi₂O₇ and Sr₂Bi₂O₇, Md Saiduzzaman, Takahiro Takei, Sayaka Yanagida, Nobuhiro Kumada, Hena Das, Hirokazu Kyokane, Shogo Wakazaki, Masaki Azuma, Chikako Moriyoshi, and Yoshihiro Kuroiwa, Inorganic Chemistry, 2019, 58 (3), pp 1759–1763

Na_1/2Bi_1/2VO₃ and K_1/2Bi_1/2VO₃: New Lead-free Tetragonal Perovskites with Moderate c/a ratio, Hajime Yamamoto, Takahiro Ogata, Satyanarayan Patel, Jurij Koruza, Jürgen Rӧdel, Atanu Paul, Tanusri Saha-Dasgupta, Yuki Sakai, Mitsuru Itoh and Masaki Azuma, Chemistry of Materials, 2018, 30 (19), pp 6728–6736

Formation of ZnO₄ Tetrahedra and ZnO₆ Octahedra in TeZnO₃ Synthesized under High Pressure, Jianhong Dai, Xudong Shen, Zhehong Liu, Qing Zhao, Xiao Wang, Cheng Dong, Yuecheng Bian, Wei Ding, Zhigao Sheng, Masaki Azuma, and Youwen Long, Inogranic Chemistry, 57 (11), 6716–6721 (2018)

Large spontaneous polarization in polar perovskites of PbTiO₃-Bi(Zn_1/2Ti_1/2)O₃, Zhao Pan, Xingxing Jiang, Jun Chen, Lei Hu, Hajime Yamamoto, Linxing Zhang, Longlong Fan, Xi’an Fan, Yawei Li, Guangqiang Li, Yang Ren, Zheshuai Lin, Masaki Azuma, Xianran Xing. Inorganic Chemistry Frontiers, Vol. 5, No. 6, pp. 1277-1281, Jun. 2018.

Enhanced piezoelectric response due to polarization rotation in cobalt-substituted BiFeO₃epitaxial thin films , K. Shimizu, H. Hojo, Y. Ikuhara, and M. Azuma, Adv. Mater., 28, (2016) 8639

Colossal negative thermal expansion in BiNiO₃ induced by intermetallic charge transfer, M. Azuma, W-T Chen, H. Seki, M. Czapsli, S. Olga, K. Oka, M. Mizumaki, T. Watanuki, N. Ishimatsu, N. Kawamura, S. Ishiwata, M. G. Tucker, Y. Shimakawa, and J. P. Attfield,, Nature Communications, 2 (2011) 347

Observation of a Spin Gap in SrCu₂O₃ Comprising Spin-1/2 Quasi-1D Two-Leg Ladders, M. Azuma, Z. Hiroi, M. Takano, K. Ishida and Y. Kitaoka, Phys. Rev. Lett., 73, 25 (1994) 3463-3466.