Abstract
We used the moving Preisach model to study the magnetization-reversal process in epitaxial SmCo (1 1 ̄ 0 0) /Fe bilayers prepared by magnetron sputtering. The SmCo(20 nm)/Fe( t nm) ( t=0, 5, 10, 20) bilayers were grown onto single-crystal (1 1 0)MgO substrates with an epitaxial 20 nm Cr(2 1 1) buffer layer. The second-quadrant magnetization curves were strictly reversible up to a field H 0, close to the field H c at which the magnetization switched irreversibly. Henkel plots for these bilayers indicated very strong magnetizing interactions for all films. Magnetization reversal in these films reflects their epitaxial structure.
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