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Magnetic scattering of spin polarized carriers in (In, Mn)Sb dilute magnetic semiconductor
M Csontos1, T Wojtowicz, X Liu
1Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary.
Abstract:
Magnetoresistance measurements on the magnetic semiconductor (In, Mn)Sb suggest that magnetic scattering in this material is dominated by isolated Mn2+ ions located outside the ferromagnetically ordered regions when the system is below T(c). A model is proposed, based on the p-d exchange between spin-polarized charge carriers and localized Mn2+ ions, which accounts for the observed behavior both below and above the ferromagnetic phase transition. The suggested picture is further verified by high-pressure experiments, in which the degree of magnetic interaction can be varied in a controlled way.
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