[21a-W241-1~12] 10.1 Emerging materials in spintronics and magnetics (excluding semiconductors)

▲ [21a-W241-10] Interfacial Exchange Coupling in FeCo/MnGa Studied by X-ray Magnetic Circular Dichroism

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

Keywords:exchange coupling,X-ray magnetic circular dichroism,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 Fe_1-xCo_x 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 Fe_1-xCo_x layers must be clarified explicitly. Here, X-ray magnetic circular dichroism (XMCD) is employed to investigate the element-specific magnetic properties at an Fe_0.4Co_0.6/Mn_1.5Ga interface. In particular, we discuss the interfacial coupling, which may be ferromagnetic or antiferromagnetic depending on the annealing of the samples.