Layer-resolved magnetic moments in N-surfactant assisted FeNi ordered alloy thin films. (1st September 2022)

• Record Type: Journal Article
• Authors: Kawaguchi, K.; Miyamachi, T.; Gozlinski, T.; Iimori, T.; Takahashi, Y.; Hattori, T.; Yamamoto, K.; Koitaya, T.; Iwayama, H.; Ishiyama, O.; Nakamura, E.; Kotsugi, M.; Wulfhekel, W.; Yokoyama, T.; Komori, F.
• Is Part Of: Japanese journal of applied physics. Volume 61:Number SL(2022)
• Publication Date: 2022-09-01
• Subjects: surface and interface -- magnetic moment -- magnetic anisotropy -- FeNi ordered alloy thin films; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/ac66c1
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We investigated structural and magnetic properties of FeNi ordered alloy thin films grown by nitrogen-surfactant assisted process using scanning tunneling microscopy and soft-X-ray absorption spectroscopy/magnetic circular dichroism. With the help of structurally controlled surface and interface by the N surfactant effect, the results successfully provide the layer-resolved spin magnetic moments of the Fe layer. Furthermore, the critical role of the topmost layer on the magnetic anisotropy is identified from a thickness dependence of the Fe orbital magnetic moment; the out-of-plane magnetization emerges when the Fe–N bonds, which favor the in-plane magnetization, break and the Ni–N bonds form in the NiN topmost layer.