[16p-Z19-1~23] 10.1 Emerging materials in spintronics and magnetics (including fabrication and characterization methodologies)

[16p-Z19-11] Detecting magnetic atom diffusion of Mn and Co at the Co₃Mn/Mn_3-dGa interface
studied by x-ray magnetic circular dichroism

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

Keywords:Magnetic Material, Perpendicular magnetic anisotropy

Magnetic ordered alloys have attracted significant attention for use as spintronics materials because they are highly likely to exhibit perpendicular magnetic anisotropy (PMA). Ultrathin CoMn 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 CoMn layers must be clarified explicitly. Here, X-ray magnetic circular dichroism (XMCD) is employed to investigate the element-specific magnetic properties at an CoMn/Mn_1.5Ga interface. In particular, we discuss the interfacial coupling, which may be ferromagnetic or antiferromagnetic depending on the annealing of the samples.