Annealing effect on the magnetization reversal and Curie temperature in a GaMnAs layer
Résumé
Vibrating Sample Magnetometer measurements were performed on a ferromagnetic (Ga,Mn)As thin film. We report Curie temperature (T-c) up to 142 K in an annealed 200 nm GaMnAs layer. This result is remarkable and comparable with the T-c obtained in GaMnAs for small thicknesses t < 50 nm. Our result reveals the high quality of the sample albeit the presence of 3 different chemical species, and a large thickness. After comparison with previous work obtained in GaMnAs, we show that for film of up to t=200 nm the out diffusion based annealing process is not thickness limited.
Domaines
Matière Condensée [cond-mat]| Origine | Fichiers produits par l'(les) auteur(s) |
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