Ferromagnetic resonance study of MnAs/(Ga,Mn)As bilayers
Résumé
We report the investigation of the static and dynamic magnetic properties of type-A MnAs/Ga(0.945)Mn(0.055)As (001) bilayers. Static magnetization measurements show them to be ferromagnetically coupled with an exchange bias field of similar to 340 Oe. The magnetocrystalline anisotropy constants of the (Ga,Mn) As layer were determined by X-band ferromagnetic resonance (FMR) spectroscopy. The (Ga,Mn) As layers are magnetically inhomogeneous as evidenced by a strong broadening of the (Ga,Mn) As uniform mode linewidth. The MnAs FMR spectra reveal the presence of a small MnAs fraction with a different orientation. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3059391]
Domaines
Matière Condensée [cond-mat]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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