Probing hole-induced ferromagnetic exchange in magnetic semiconductors by inelastic neutron scattering
H. Kepa, Le Van Khoi, C. M. Brown, M. Sawicki, J. K. Furdyna, T. M. Giebultowicz, T. Dietl
Abstract
The effect of hole doping on the exchange coupling of the nearest neighbor (NN) Mn pairs in Zn1-xMnxTe is probed by inelastic neutron scattering. The difference in the NN exchange energy ΔJ1 in the presence and in the absence of the holes is determined. The obtained value of ΔJ1 is in good agreement with the predictions of the Zener/RKKY model, even on the insulator side of the metal-insulator transition.
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