Ferromagnetic resonance study of MnAs/GaAs(111) thin films

A. H. V. Repetto Llamazares , J. Milano (1) , L. B. Steren , V. Garcia (2) , M. Marangolo (2) , M. Eddrief (2) , Victor H. Etgens (2)

1 Centro Atómico Bariloche [Argentine]
2 INSP - Institut des Nanosciences de Paris

In this contribution we present a study of the magnetic properties of MnAs thin films grown over GaAs(I 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(I 0 0) thin films. We propose different microscopic mechanism for addressing the change in the anisotropy. (C) 2007 Elsevier B.V. All rights reserved.

Mots clés: magneto-crystalline anisotropy; ferromagnetic resonance; thin films; spintronics devices

Domaines: Matière Condensée [cond-mat]

A. H. V. Repetto Llamazares, J. Milano, L. B. Steren, V. Garcia, M. Marangolo, et al.. Ferromagnetic resonance study of MnAs/GaAs(111) thin films. Physica B: Condensed Matter, 2007, 398 (2), pp.372-375. ⟨10.1016/j.physb.2007.04.043⟩. ⟨hal-01293143⟩