Transfer of magnetization by spin injection between both interfaces of a Ni nanowire

TL;DR

This study investigates how spin injection can switch magnetization in Ni nanowires, revealing dependence on interface symmetry, temperature, and current amplitude, with implications for spin-transfer phenomena.

Contribution

It demonstrates that magnetization switching via spin injection occurs only with asymmetric interfaces and is unaffected by current sign, advancing understanding of spin-transfer in nanostructures.

Findings

Magnetization response decreases with temperature.

Switching occurs only with asymmetric interfaces.

Spin-injection does not affect small magnetic inhomogeneities.

Abstract

Magnetization switching provoked by spin-injection is studied in Ni nanowires of various size and morphology. The response of the magnetization to the spin-injection is studied as a function of the amplitude of the current, the temperature, and the symmetry of the interfaces. The amplitude of the response of the magnetization to spin-injection is a decreasing function of the temperature, does not depend on the current sign, and occurs only in the case of asymmetric interfaces. It is shown that the spin-injection does not act on small magnetic inhomogeneities inside the layer. Some consequences in terms of longitudinal spin-transfer are discussed.