[19p-D104-7~21] 10.1 新物質・新機能創成（作製・評価技術）

▲ [19p-D104-12] Perpendicular magnetic anisotropy in as-dposited La/CoFeB/MgO layered structures.

〇(M2)Yuki Iida^1,2、Jun Okabayashi³、Peng Sheng²、Masamitsu Hayashi^2,3、Seiji Mitani^1,2 (1.Univ. of Tsukuba、2.NIMS、3.The Univ. of Tokyo)

キーワード：Perpendicular magnetic anisotropy, Orbital magnetic moment, Electronegativity

It is well known that perpendicular magnetic anisotropy (PMA) is increased by post-annealing at the CoFeB/MgO interface. On the other hand, interface PMA can also be observed even for the as-deposited CoFeB/MgO layered structures, depending on the underlayer materials. In this study, we investigated PMA in as-deposited La/CoFeB/MgO, La/CoFeB/La, MgO/CoFeB/MgO layered structures by a vibrating sample magnetometer. To further investigate the correlation between PMA and orbital magnetic moments, x-ray magnetic circular dichroism was measured for Fe-L_2,3 and La-M_4,5 edges.