Open AccessLayer-resolved magnetic moments in N-surfactant assisted FeNi ordered alloy thin films
Author(s) -
Kakuhiro Kawaguchi,
Toshio Miyamachi,
Thomas Gozlinski,
Takushi Iimori,
Yuki Takahashi,
Takefumi Hattori,
Kohei Yamamoto,
Takanori Koitaya,
Hiroshi Iwayama,
Osamu Ishiyama,
Eiken Nakamura,
Masato Kotsugi,
Wulf Wulfhekel,
Toshihiko Yokoyama,
Fumio Komori
Publication year - 2022
Publication title -
japanese journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 129
eISSN - 1347-4065
pISSN - 0021-4922
DOI - 10.35848/1347-4065/ac66c1
Subject(s) - magnetic circular dichroism , magnetic moment , magnetic anisotropy , magnetization , materials science , scanning tunneling microscope , alloy , condensed matter physics , layer (electronics) , thin film , magnetic force microscope , absorption (acoustics) , x ray magnetic circular dichroism , pulmonary surfactant , crystallography , chemistry , nanotechnology , composite material , spectral line , magnetic field , physics , biochemistry , quantum mechanics , astronomy
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.