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Article Dans Une Revue Physica B: Condensed Matter Année : 2012

Fe/MnAs bilayers: Magnetic anisotropy and the role of the interface

G. Alejandro
  • Fonction : Auteur
J. Milano
  • Fonction : Auteur
L. B. Steren
  • Fonction : Auteur
J. E. Gayone
  • Fonction : Auteur

Résumé

We have studied different aspects of the magnetic behavior of Fe(5 nm)/MnAs(100 nm) bilayers epitaxially grown on GaAs( 1 0 0 ). Ferromagnetic resonance (FMR) measurements were performed in order to characterize the magnetic anisotropies of the films and the interlayer coupling between them. The chemical composition of the interface was investigated by X-ray photoemission spectroscopy (XPS). The iron layer FMR spectrum is highly temperature dependent between 280K and 320K as its parameters are strongly altered in the alpha/beta phase coexistense regime of the MnAs layer, revealing a strong interlayer coupling in this T-region. Additionally, the XPS experiments demonstrate the existence of an Fe-MnAs intermixed interface. This result would explain appearance of an additional uniaxial anisotropy in the plane of the Fe films, together with a strong reduction in its magnetocrystalline anisotropy and a negligible direct exchange coupling in the MnAs ferromagnetic state. (C) 2012 Published by Elsevier B.V.

Dates et versions

hal-01240534 , version 1 (09-12-2015)

Identifiants

Citer

G. Alejandro, J. Milano, L. B. Steren, J. E. Gayone, Mahmoud Eddrief, et al.. Fe/MnAs bilayers: Magnetic anisotropy and the role of the interface. Physica B: Condensed Matter, 2012, 407 (16), pp.3161-3164. ⟨10.1016/j.physb.2011.12.053⟩. ⟨hal-01240534⟩
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