"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 "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 "Kengo Oka,Masaki Azuma,Wei-tin Chen,hitoshi Yusa,Alexei A. Belik,Eiji Takayama-Muromachi,Masaichiro Mizumaki,Naoki Ishimatsu,Nozomu Hiraoka,Masahiko Tsujimoto,Matthew G. Tucker,J. Paul Attfield,Yuichi Shimakawa","Pressure-Induced Spin-State Transition in BiCoO3",,"JOURNAL OF THE AMERICAN CHEMICAL SOCIETY",,"Vol. 132","No. 27","p. 9438",2010,July "Mizumaki, M.,N. Ishimatsu,N. Kawamura,M. Azuma,Y. Shimakawa,M. Takano,Takayuki Uozumi","Direct observation of the pressure-induced charge redistribution in BiNiO3 by x-ray absorption spectroscopy.",,"Phys. Rev. B,",,"Vol. 80",," 125105-1-125105-4",2009, "Hiroo Hashizume,Naoki Ishimatsu,OSAMI SAKATA,N. Hosoito,T. Iizuka,Kazumichi Namikawa,Toshiaki Iwazumi,L. E. Berman,G. Srajer,C. T. Venkataraman,J. C. Lang,C. S. Nelson,K. B. Lee,D. R. Lee","Resonant X-ray Magnetic Scattering from the Twisted States of an Fe/Gd Multilayer",,"Physica B",," 248",," 133",1998,