"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.
"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.
"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.
"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.
"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.