Abstract
Carrier-induced ferromagnetism in the doped diluted magnetic semiconductors , where is As or Sn and ( ) denotes Mn atoms whose local magnetic moment is parallel (antiparallel) to the magnetization, are investigated using the Korringa-Kohn-Rostoker coherent-potential approximation and local density approximation first-principles calculation. The result shows that (i) the ferromagnetic state is stable due to the double exchange at low concentrations of , and (ii) a spin-glass-like local-moment disordered state, which stems from the superexchange, is more favorable when the Mn holes are nearly compensated.
- Received 5 June 1998
DOI:https://doi.org/10.1103/PhysRevLett.81.3002
©1998 American Physical Society