MAGNETIC-ANISOTROPY OF FE FILMS IN MGO CU(T(CU))/FE/CU SYSTEMS/

Ferromagnetic resonance was employed to study the magnetic anisotropy of the Fe thin film in the MgO/Cu(t(Cu))/Fe/Cu system. The Fe film sho wed strong fourfold cubic anisotropy (H-K1 = 2K(1)/M = 46.15 kA/m) for t(Fe) = 23 nm and t(Cu) = 0. The spread of the crystallographic axes Delta beta = 0.5 degrees was evaluated from the angular dependence of the resonance line width Delta H-pp (4.4 < Delta H-pp < 6.4 kA/m). Suc h a small mosaicity confirmed the epitaxial growth of the Fe film. The Cu buffer layer destroys this growth of the Fe film which showed only a weak anisotropy.