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A spin-pair model including magnetoelastic terms to second order in strain is used to analyze the magnetic anisotropy of epitaxial Cu/Ni/Cu/Si(001) films. Two adjustable parameters are used to fit the magnetic anisotropy data taken by a torque magnetometer. It is found that the nonlinear bulk magnetoelastic term can contribute up to about 40% of the total anisotropy energy for thinner nickel films.
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Ha et al. (1999) studied this question.
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