Magnetic scattering of spin polarized carriers in (In,Mn)Sb dilute magnetic semiconductor

Details Magnetic scattering of spin polarized carriers in (In,Mn)Sb dilute magnetic semiconductor Magnetic scattering of spin polarized carriers in (In,Mn)Sb dilute magnetic semiconductor

2005-05-24

arxiv.org/abs/cond-mat/0505582v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.95.227203

Magnetoresistance measurements on the magnetic semiconductor (In,Mn)Sb suggest that magnetic scattering in this material is dominated by isolated Mn$^{2+}$ 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 Mn$^{2+}$ 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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