Uniaxial in-plane magnetic anisotropy of a CoPt thin film induced by ion irradiation

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The mechanism for ion-induced uniaxial magnetic anisotropy of ferromagnetic CoPt thin films is investigated using x-ray diffraction and soft x-ray emission spectroscopy. When Co/Pt multilayers 64 nm thick are irradiated with 80 keV Ar+ ions in an externally applied magnetic field, the magnetization of the ion-irradiated area shows a significant anisotropic angular dispersion in its hysteresis. Analysis of x-ray diffraction patterns and Co L-3 emission spectra reveals that the formation of partially ordered (face-centered-tetragonal) CoPt phase and nonequivalent electronic hybridization between easy and hard axes causes the induction of a uniaxial magnetic anisotropy.
Publisher
AMER INST PHYSICS
Issue Date
2006-02
Language
English
Article Type
Article
Citation

APPLIED PHYSICS LETTERS, v.88, pp.349 - 358

ISSN
0003-6951
DOI
10.1063/1.2180867
URI
http://hdl.handle.net/10203/13362
Appears in Collection
RIMS Journal Papers
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