[P-29] Realization of high quality Fe3O4 thin film on atomically flat and high crystallinity MgO substrate surface 〇Ai Isohashi Osaka1、Daisetsu Toh1、Kazuto Yamauchi1、Yasuhisa Sano1、Hidekazu Tanaka1、Azusa Nakamoto Hattori1 (1.Osaka University) キーワード:Surface treatment、Chemical polishing、Film device、Strongly correlated electron system、