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

TL;DR

This study investigates magnetic scattering in (In,Mn)Sb, revealing that isolated Mn$^{2+}$ ions outside ferromagnetic regions dominate scattering, modeled via p-d exchange, and confirmed through high-pressure experiments.

Contribution

A new model based on p-d exchange explains magnetic scattering in (In,Mn)Sb across different magnetic phases, supported by high-pressure experimental verification.

Findings

Magnetic scattering is dominated by isolated Mn$^{2+}$ ions outside ferromagnetic regions.

The p-d exchange model accurately describes behavior below and above $T_c$.

High-pressure experiments confirm the controllable magnetic interactions.

Abstract

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.