"Koomok Lee,Hena Das,Yuki Sakai,Takumi Nishikubo,Kei Shigematsu,Daiki Ono,Takehiro Koike,Naomi Kawamura,Masaichiro Mizumaki,Naoki Ishimatsu,Masaki Azuma","High-spin C?o3+ as a trigger of weak ferromagnetism in Co-substituted BiFe?O3",,"Physical Review B",," 110"," 2"," 024422",2025,July "Wei-tin Chen,Takumi Nishikubo,Yuki Sakai,Hena Das,Masayuki Fukuda,Zhao Pan,Naoki Ishimatsu,Masaichiro Mizumaki,Naomi Kawamura,Saori I. Kawaguchi,Olga Smirnova,Mathew G. Tucker,Tetsu Watanuki,Akihiko Machida,Shigehiro Takajo,Yoshiya Uwatoko,Yuichi Shimakawa,Mikio Takano,Masaki Azuma,J. Paul Attfield","Pressure-induced charge amorphisation in BiNiO3",,"Nature Communications",," 16"," 1"," 2128",2025,Mar. "Zhiqing Feng,Soutaro Honda,Junya Ohyama,Yasushi Iwata,Keisuke Awaya,Hiroshi Yoshida,Masato Machida,Kotaro Higashi,Tomoya Uruga,Naomi Kawamura,Ryota Goto,Takeo Ichihara,Ryoichi Kojima,Makoto Moriya,Hideo Notsu,Shinsuke Nagata,Mami Miyoshi,Teruaki Hayakawa,Yuta Nabae","Structural Effects of FeN4 Active Sites Surrounded by Fourteen-Membered Ring Ligands on Oxygen Reduction Reaction Activity and Durability",,"ACS Catalysis","American Chemical Society","Vol. 14","No. 10","pp. 7416-7425",2024,Apr. "N. Ishimatsu,T. Watanabe,K. Oka,M. Azuma,M. Mizumaki,K. Nitta,T. Ina,N. Kawamura","Differences in local structure around Co and Fe of the BiCo1|x Fex O3 system determined by x-ray absorption fine structure",,"PHYSICAL REVIEW B",,"Vol. 92",,"pp. 054108-1-9",2015, "Masaki Azuma,Wei-tin Chen,Hayato seki,Michal Czapski,Smirnova olga,Kengo oka,Masaichiro Mizumaki,Tetsu Watanuki,Naoki Ishimatsu,Naomi Kawamura,Shintaro Ishiwata,Matthew G. Tucker,Yuichi Shimakawa,J. Paul Attfield","Colossal negative thermal expansion in BiNiO3 induced by intermetallic charge transfer",,"NATURE COMMUNICATIONS",,"Vol. 2","No. 347","pp. 1-5",2011,June