[17a-501-1~12] 10.1 Emerging materials in spintronics and magnetics (including fabrication and charactrization methodologies)

[17a-501-7] Control of epitaxial strain and magnetic anisotropy in cobalt-ferrite thin film by buffer layers

〇Hiroshige Onoda¹, Yuki Hisamatsu¹, Jun-ichiro Inoue¹, Hiroaki Sukegawa², Hideto Yanagihara¹ (1.Univ. of Tsukuba, 2.NIMS)

Keywords:magneto-elastic effects, perpendicular magnetic anisotropy, spinel ferrite

Co-ferrite films on MgO (001) substrates exhibit perpendicular magnetic anisotropy (PMA). It is known that this PMA is caused by magneto-elastic effects in a tetragonally distorted crystal structure such as a thin film with a substrate-induced epitaxial strain. In this study, we introduced a spinel oxide with a larger lattice constant than MgO as buffer layers and deposited Co-ferrite on them. We confirmed that the larger strain was introduced into Co-ferrite films than that on MgO, and magnetic anisotropy were also enhanced.