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We discuss the origin of ferromagnetism in dilute magnetic semiconductors based on ab initio calculations for Mn-doped GaN, GaP, GaAs and GaSb. We use the Korringa-Kohn- Rostoker method in connection with the coherent potential approximation to describe the substitutional and moment disorder. Curie temperatures (TC) are calculated from first-principles by using a mapping on a Heisenberg...
Magnetotransport properties of ferromagnetic semiconductor (Ga,Mn)As have been investigated. Measurements at low temperature (50 mK) and high magnetic field (=<27T) have been employed in order to determine the hole concentration p=3.5x10 20 cm -3 of a metallic (Ga 0.947 Mn 0.053 )As layer. The analysis of the temperature...
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