Abstract
Electric field control of magnetic properties has been achieved across a number of different material systems. In diluted magnetic semiconductors (DMSs), ferromagnetic metals, multiferroics, etc., electrical manipulation of magnetism has been observed. Here, we study the effect of an electric field on the carrier spin polarization in DMSs ( GaAsMn ); in particular, emphasis is given to spin-dependent transport phenomena. In our system, the interaction between the carriers and the localized spins in the presence of electric field is taken as the main interaction. Our results show that the electric field plays a major role on the spin polarization of carriers in the system. This is important for spintronics application.
Highlights
E magnetic properties observed on the diluted magnetic semiconductor (DMS) are based on the kind of interaction involved in these subsystems. ere are different proposed models for understanding the mechanism of ferromagnetism in the DMS and are used for explaining different magnetic phenomena [4]
Regardless of their difference, in most models, charge carriers are considered as itinerant carriers moving in the conduction or valence bands. e density of these carriers is a key factor in terms of the kinetic energy of the system as well as their contribution for assisting coupling of the magnetic ions leading to Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction [5]
We investigate the effect of electric field on spin-polarized charge densities in DFMS based on the s − d exchange interaction model. e s − d exchange interaction model is a useful theoretical approach for incorporating carrier spin interaction with the localized spin moments
Summary
E magnetic properties observed on the DMS are based on the kind of interaction involved in these subsystems. ere are different proposed models for understanding the mechanism of ferromagnetism in the DMS and are used for explaining different magnetic phenomena [4]. In DMSs, there can be a sizable exchange interaction between carrier spin and the magnetic ions. We investigate the effect of electric field on spin-polarized charge densities in DFMS based on the s − d exchange interaction model. We use a Green function (GF) formalism for the calculation of the spin-polarized carrier densities.
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