"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<sub>0.9</sub>Co<sub>0.1</sub>O<sub>3 </sub>thin films",,"APPLIED PHYSICS EXPRESS",,"  13","  7",,2020,June
"Hayato Ishizaki,Hajime Yamamoto,Takumi Nishikubo,Yuki Sakai,Shogo Kawaguchi,Keisuke Yokoyama,Yoichi Okimoto,Shin-ya Koshihara,Takafumi Yamamoto,Masaki Azuma","Robust Giant Tetragonal Distortion Coupled with High-Spin Co3+ in Electron-Doped BiCoO3",,"Inorganic Chemistry",,"vol. 58",,"p. 16059-16064",2019,Nov.
"“Œ �³Ž÷,ŽR–{ –Ð","‹�‘啉”M–c’£‚Ö‚Ì’§�í  “dŽqƒh�[ƒv‹­—U“d‘ÌPbVO<sub>3</sub>",,"‰»Šw",,"Vol. 73","No. 10","pp. 68-69",2019,Oct.
"Blair Lebert,Hajime Yamamoto,Masaki Azuma,Rolf Heid,Satoshi Tsutsui,Hiroshi Uchiyama,Alfred Q.R Baron,Benoit Baptiste,Matteo d'Astuto","Phonon anomalies with doping in superconducting oxychlorides Ca<sub>2-x</sub>CuO<sub>2</sub>Cl<sub>2</sub>",,,,,,,2019,Apr.
"“Œ �³Ž÷,‰ª Œ¤Œá,ŽR–{ –Ð,Žðˆä —YŽ÷","‘Š“]ˆÚŒ^‹�‘啉”M–c’£•¨Ž¿",,"‰ž—p•¨—�",,"Vol. 88","No. 3",,2019,Mar.
"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",2019,Jan.
"Takahiro Ogata,Yuki Sakai,Hajime Yamamoto,Satyanarayan Patel,Peter Keil,Jurij Koruza,Shogo Kawaguchi,Zhao Pan,Takumi Nishikubo,Ju?rgen Ro?del,Masaki Azuma","Melting of d<sub>x</sub><sub>y </sub>Orbital Ordering Accompanied by Suppression of Giant Tetragonal Distortion and Insulator-to-Metal Transition in Cr-Substituted PbVO<sub>3</sub>",,"Chemistry of Materials",,"Vol. 31",,"pp. 1352-1358",2019,Jan.
"Hajime Yamamoto,Takahiro Ogata,Satyanarayan Patel,Jurij Koruza,Ju?rgen Ro?del,Atanu Paul,Tanusri Saha-Dasgupta,Yuki Sakai,Mitsuru Itoh,Masaki Azuma","Na<sub>1/2</sub>Bi<sub>1/2</sub>VO<sub>3</sub> and K<sub>1/2</sub>Bi<sub>1/2</sub>VO<sub>3</sub>: New Lead-Free Tetragonal Perovskites with Moderate c/a Ratios",,"Chemistry of Materials",,"vol. 30",,"pp. 6728-6736",2018,Oct.
"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",,,,,,2018,Sept.
"Hajime Hojo,Kengo Oka,Keisuke Shimizu,Hajime Yamamoto,Ryo Kawabe,Masak Azuma","Development of Bismuth Ferrite as a Piezoelectric and Multiferroic Material by Cobalt Substitution",,"ADVANCED MATERIALS",,"Vol. 30","No. 33","p. 1705665",2018,Aug.
"Hajime Yamamoto,Takashi Imai,Yuki Sakai,Masaki Azuma","Colossal Negative Thermal Expansion in Electron-Doped PbVO<sub>3</sub> Perovskites",,"ANGEWANDTE CHEMIE-INTERNATIONAL",,"Vol. 57",,"pp. 8170-8173",2018,July
"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","Large spontaneous polarization in polar perovskites of PbTiO<sub>3</sub>-Bi(Zn<sub>1</sub><sub>/</sub><sub>2</sub>Ti<sub>1</sub><sub>/</sub><sub>2</sub>)O-<sub>3</sub>",,"Inorganic Chemistry Frontiers",,"Vol. 5","No. 6","pp. 1277-1281",2018,June
"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<sub>1</sub><sub>-</sub><sub>x</sub>Mn<sub>x</sub>O<sub>3</sub> thin film induced by spin-structure manipulation",,"Applied Physics Letters.",,"Vol. 112",,"p. 192905",2018,May
"Hajime Yamamoto","Electronic configuration control of 3d transition metal in perovskite oxides for tuning physical properties and structural distortion",,,,,,,2018,Mar.
"Hajime Yamamoto","Electronic configuration control of 3d transition metal in perovskite oxides for tuning physical properties and structural distortion",,,,,,,2018,Mar.
"Hajime Yamamoto","Electronic configuration control of 3d transition metal in perovskite oxides for tuning physical properties and structural distortion",,,,,,,2018,Mar.
"Hajime Yamamoto","Electronic configuration control of 3d transition metal in perovskite oxides for tuning physical properties and structural distortion",,,,,,,2018,Mar.
"H. Yamamoto,Y. Sakai,K. Shigematsu,T. Aoyama,T. Kimura,M. Azuma","Reorientation of the Magnetic Easy Plane in a Co-Substituted BiFeO<sub>3</sub> Single Crystal",,"Inorganic Chemistry",,"Vol. 56","No. 24","pp. 15171-15177",2017,Dec.
"Haruki Shimizu,Keisuke Shimizu,Hajime Yamamoto,Hajime Hojo,Kei Shigematsu,Masaki Azuma","Stable polarization reversal in third elements substituted  multiferroic BiFe0.9Co0.1O3 thin films","The 9th APCTP Workshop on Multiferroics",,,,,,2017,Nov.
"Keisuke Shimizu,Ryo Kawabe,Hajime Yamamoto,Hajime Hojo,Kei Shigematsu,Masaki Azuma","Direct observation of magnetization reversal by polarization switching in multiferroic Co-substituted BiFeO3 thin film","The 9th APCTP Workshop on Multiferroics",,,,,,2017,Nov.
"Z. Pan,J. Chen,X. X. Jiang,L. Hu,R. Z. Yu,H. Yamamoto,T. Ogata,Y. Hattori,F. M. Guo,X. A. Fan,Y. W. Li,G. Q. Li,H. Z. Gu,Y. Ren,Z. S. Lin,M. Azuma,X. R. Xing","Colossal Volume Contraction in Strong Polar Perovskites of Pb(Ti,V)O<sub>3</sub>",,"Journal of the American Chemical Society",,"Vol. 139","No. 42","pp. 14865-14868",2017,Oct.
"�´�…—zŽ÷,�´�…Œ[—C,ŽR–{–Ð,–kžŠŒ³,�d�¼Œ\,“Œ�³Ž÷","ƒ}ƒ‹ƒ`ƒtƒFƒ�ƒCƒbƒNBiFe0.9Fe0.1O3”––Œ‚Ö‚Ì‘æ3Œ³‘f’uŠ·",,,,,,,2017,Sept.
"Yuki Sakai,Junye Yang,Runze Yu,Hajime Hojo,Ikuya Yamada,Ping Miao,Sanghyun Lee,Shuki Torii,Takashi Kamiyama,Marjana Le?ai?,G.Bihlmayer,M. Mizumaki,J.Komiyama,T.Mizokawa,H.Yamamoto,T.Nishikubo,Y.Hattori,K. Oka,Y.Yin,J.Dai,W.Li,S.Ueda,A.Aimi,D.Mori,Y. Inaguma,Z.Hu,T. Uozumi,C.Jin,Y.Long,Masaki Azuma","A-site and B-site charge orderings in an s-d level controlled perovskite oxide PbCoO<sub>3</sub>",,"Journal of the American Chemical Society",,"Vol. 139","No. 12","pp. 4574-4581",2017,Mar.
"�ó‘q •�Žu,ŽR–{ –Ð,�´�… Œ[—C,�d�¼ Œ\,–kžŠ Œ³,�p�¶ �U,“Œ �³Ž÷","BiFe1-xMn xO3‚̃Xƒsƒ“�\‘¢•Ï‰»","‰ž—p•¨—�Šw‰ï",,,,,,2017,Mar.
"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 BiFe<sub>1</sub>-<sub>x</sub>Co<sub>x</sub>O<sub>3</sub> Thin Films",,"Advanced materials",,"Vol. 29","No. 9","p. 1603131",2017,Mar.
"�ó‘q•�Žu,ŽR–{–Ð,�´�…Œ[—C,�d�¼Œ\,–kžŠŒ³,�p�¶�U,“Œ�³Ž÷","BiFe1-xMn xO3‚̃Xƒsƒ“�\‘¢•Ï‰»","‘æ55‰ñƒZƒ‰ƒ~ƒbƒNƒXŠî‘b‰ÈŠw“¢˜_‰ï",,,,,,2017,Jan.
"N. Kumada,A. Nakamura,Akira Miura,T. Takei,M. Azuma,H. Yamamoto,E. Magome,C. Moriyoshi,Y. Kuroiwa","Hydrothermal synthesis and crystal structure of a new lithium copper bismuth oxide, LiCuBiO<sub>4</sub>",,"Journal Of Solid State Chemistry",,"Vol. 245",,"pp. 30-33",2017,Jan.
"M. Azuma,H. Hojo,R. Kawabe,K. Shimizu,H. Yamamoto,K. Mibu,K. Samanta,T. Saha-Dasgupta","Room temperature ferromagnetism in Co substituted BiFeO<sub>3</sub> induced by spin structure change","Indo-US Bilateral Workshop on Physics and Chemistry of Oxides: Theory meets Experiment",,,,,,2017,Jan.
"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 BiFe<sub>1</sub>�| <sub>x</sub>Co<sub>x</sub>O<sub>3</sub> Thin Films",,"Advanced Materials",,"Vol. 29","No. 9","pp. 1603131-1?1603131-7",2016,Dec.
"Nobuhiro Kumada,Ayumi Nakamura,Akira Miura,Takahiro Takei,Masaki Azuma,Hajime Yamamoto,Eisuke Magome,Chikako Moriyoshi,Yoshihiro Kuroiwa","Hydrothermal synthesis and crystal structure of a new lithium copper bismuth oxide, LiCuBiO 4",,"Journal of Solid State Chemistry",,"Vol. 245",,"pp. 30-33",2016,Oct.
"Zhao Pan,Jun Chen,Runze Yu,Hajime  Yamamoto,Yangchun Rong,Lei Hu,Qiang Li,Kun Lin,Li You,Kun  Zhao,Masaki Azuma","Giant Polarization and High Temperature Monoclinic Phase in a Lead-Free Perovskite of Bi (Zn0. 5Ti0. 5) O3-BiFeO3",,"Inorganic Chemistry",,"Vol. 55","No. 19","pp. 9513-9516",2016,Sept.
"Runze Yu,Narumi Matsuda,Ken Tominaga,Keisuke Shimizu,Hajime Hojo,Yuki Sakai,Hajime Yamamoto,Kengo Oka,Masaki Azuma","High-Temperature Monoclinic Cc Phase with Reduced c/a Ratio in Bi-based Perovskite Compound Bi<sub>2</sub>ZnTi<sub>1</sub>�|<sub>x</sub>Mn<sub>x</sub>O<sub>6</sub>",,"Inorganic Chemistry",,"Vol. 55","No. 12","pp. 6124-6129",2016,June
"Hajime Yamamoto,Takumi Kihara,Kengo Oka,Tokunaga Masashi,Ko Mibu,Masaki Azuma","Spin Structure Change in Co-Substituted BiFeO<sub>3 </sub>",,"Journal of the Physical Society of Japan",,"Vol. 85",,"pp. 064704-1-4",2016,May