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

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8 Author(s)
Chang, G.S. ; Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK 57N 5E2, Canada ; Moewes, A. ; Kim, S.H. ; Lee, J.
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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 L3 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.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 9 )

Date of Publication:

Feb 2006

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