Ferromagnetic resonance study of MnAs/GaAs(1 1 1) thin films

A.H.V. REPETTO LLAMAZARES, J. MILANO, L.B. STEREN, V. GARCIA, M. MARANGOLO, M. EDDRIEF AND V.H. ETGENS

PHYSICA B - CONDENSED MATTER

Elsevier

Año: 2007 vol. 398 p. 372 - 375

0921-4526

In this contribution we present a study of the magnetic properties of MnAs thin films grown over GaAs(1 1 1) substrates, performed by ferromagnetic resonance experiments. We have calculated the magneto-crystalline anisotropy of the system analyzing the angular dependence of the resonance field with the applied field direction. The anisotropy measured for these films is much smaller than the calculated for MnAs bulk samples and MnAs/GaAs(1 0 0) thin films. We propose different microscopic mechanism for addressing the change in the anisotropy.