[10a-S203-1~9] 6.3 Oxide electronics

△ [10a-S203-7] Control of B-antisite disorder and observation of exchange bias in double-perovskite-type La₂MnCoO₆ films

〇(M2)Shutong Zhang¹, Ramchandra Sahoo¹, Takuto Soma¹, Miho Kitamura², Koji Horiba^2,3, Hiroshi Kumigashira^2,3,4, Osami Sakata^3,5, Akira Ohtomo^1,3 (1.Tokyo Tech., Chem. Sci. Eng., 2.KEK-IMSS, 3.MCES, 4.Tohoku Univ., IMRAM, 5.NIMS)

Keywords:exchange bias, double-perovskite-type oxide

Exchange bias is widely used such as magnetic heads of HDD. Recently, an extremely large exchange bias has been discovered in a sintered polycrystalline of double-perovskite-type A₂MnCoO₆ in which the B site has a ordered rock-salt-type structure, but the origin is still unknown. In this study, we assumed that the origin is in the B antisite defect, and grew La₂MnCoO₆ thin films by using PLD method that can control the B antisite defect in a non-equilibrium way to clarify the origin of this giant exchange bias.