Abstract
An investigation was made of the anisotropic properties of Fe films obtained by molecular-beam epitaxy on GaAs(100) substrates. It is shown that at thicknesses t=40–50 A the Fe films begin to exhibit cubic magnetic anisotropy. At thicknesses t>100 A the first constant of cubic anisotropy K1 has values similar to those for “bulk” Fe single crystals. Films of intermediate thickness 50<t<100 A possess both isotropic and anisotropic phases.
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