[19a-E216-1~12] 10.1 Emerging materials in spintronics and magnetics (including fabrication and charactrization methodologies)

▲ [19a-E216-12] Detecting interfacial quadrupoles at Fe/MgO interfaces by X-ray magnetic linear dichroism

〇Jun Okabayashi¹, Yuki Iida^2,3, Qingyi Xiang², Hiroaki Sukegawa², Seiji Mitani^2,3 (1.The Univ. of Tokyo, 2.NIMS, 3.Tsukuba Univ.)

Keywords:Quadrupole moments, X-ray magnetic linear dichroism, Perpendicular magnetic anisotropy

Strong perpendicular magnetic anisotropy (PMA) at the interfaces between MgO and Fe has been developed. Orbital moment anisotropy is one of the candidates in the origin of PMA. In this presentation, we discuss the quadrupole moments at the Fe/MgO interface through the interfacial strain by x-ray magnetic linear dichroism (XMLD). We succeeded in the measurements of XMLD for PMA interfaces, which deduces the interfacial quadrupole moment at Fe/MgO. We found that orbital moment anisotropy can be a main factor for PMA with the small contribution of quadrupoles.