[13a-A22-1~11] 10.1 Emerging materials in spintronics and magnetics (excluding semiconductors)

▲ [13a-A22-8] Interfacial Exchange Coupling between Transition Metal and MnGa Studied by X-ray Magnetic Circular Dichroism

〇Jun Okabayashi¹, Kazuya Suzuki², Shigemi Mizukami² (1.Univ. of Tokyo, 2.WPI, Tohoku Univ.)

Keywords:XMCD

Magnetic ordered alloys have attracted significant attention for use as spintronics materials because they are highly likely to exhibit perpendicular magnetic anisotropy (PMA). Ultrathin transition-metal (TM) Fe or Co layers deposited on Mn_3-dGa couple ferromagnetically or antiferromagnetically, depending on their compositions. However, the abruptness and element-specific magnetic properties at the interfaces between Mn_3-dGa and TM layers must be clarified explicitly. Here, X-ray magnetic circular dichroism (XMCD) is employed to investigate the element-specific magnetic properties at an TM/Mn_1.5Ga interface. In particular, we discuss the interfacial coupling, which may be ferromagnetic or antiferromagnetic depending on the annealing of the samples.