Thickness and temperature dependence of magnetic anisotropies in ultrathin fcc Co(001) structures

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Abstract
Metastable fcc Co(001) structures were grown on fcc Cu(001) using molecular beam epitaxy. Magnetic properties of these structures were studied using the ferromagnetic resonance technique. The uniaxial perpendicular and fourfold in-plane anisotropies are presented for different thicknesses. Both anisotropies are shown to be well described by a sum of contributions from the constant volume term and the 1/d-dependent surface term. The effect of tetragonal distortion on magnetic anisotropies is presented. The temperature dependence of anisotropies is discussed.