Spin-polarizing properties of heterostructures with magnetic nano elements
Armen N. Kocharian, Avag S. Sahakyan, Ruzan M. Movsesyan
TL;DR
This paper investigates how electron spin polarization can be controlled and enhanced in one-dimensional heterostructures with magnetic barriers by analyzing resonant and non-resonant scattering and the effects of magnetization angles.
Contribution
It provides an exact transfer-matrix method to calculate electron transmittance and spin polarization in heterostructures with non-collinear magnetic barriers, highlighting control mechanisms.
Findings
Transmittance and spin polarization are significantly enhanced at certain angles.
The magnetization angle drastically influences electron spin polarization.
Resonant and non-resonant transmittances show different polarization behaviors.
Abstract
The problem of electron resonant and non-resonant scatterings on two magnetized barriers is studied in the one-dimension. The transfer-matrix is built up to exactly calculate the coefficient of the electron transmittance through the system of two magnetic barriers with non-collinear magnetizations. The polarization of the transmitted electron wave for resonance and non-resonance transmittances is calculated. The transmittance coefficient and spin polarization can be drastically enhanced and controlled by the angle between the barrier magnetizations
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