[18a-131-1~10] 10.1 Emerging materials in spintronics and magnetics (including fabrication and charactrization methodologies)

▲ [18a-131-10] The crystal structure and magnetotransport properties of Co_xFe_3-xO₄ films and Co_xFe_3-xO₄ / MgO or AlO_x / FePt multilayers

〇Asaka Tsujie¹, Takashi Yanase², Toshihiro Shimada², Taro Nagahama² (1.Hokkaido Univ*, 2.Hokkaido Univ.)

Keywords:ferrites, thin film structure, magnetic hysteresis

Co_xFe_3-xO₄ has a potential as a spintronic material with perpendicular magnetization. The transport characteristics and magnetic anisotropy are controllable by varying the composition of Fe and Co . Such material is a candidate for the electrode of perpendicular magnetic tunnel junctions. However, there have been few reports about the relation between the electric and magnetic transport and compositions. In this study, we fabricated the Co_xFe_3-xO₄ with various compositions and investigated the characteristics. Furthermore, we prepared Co_xFe_3-xO₄ / MgO or AlO_x / FePt multilayers to realize the MTJs.