Proposal of an experimental scheme for determination of penetration depth of transverse spin current by a nonlocal spin valve

TL;DR

This paper proposes a theoretical experimental method using a nonlocal spin valve with three ferromagnetic layers to measure the penetration depth of transverse spin currents by analyzing the spin signal dependence on the absorber layer's thickness.

Contribution

It introduces a novel experimental scheme for determining transverse spin current penetration depth using a three-layer nonlocal spin valve setup.

Findings

Penetration depth can be inferred from magnetoresistance measurements.

The proposed method provides a way to quantify transverse spin current behavior.

Theoretical analysis supports the feasibility of the experimental scheme.

Abstract

We theoretically propose an experiment to determine the penetration depth of a transverse spin current using a nonlocal spin valve with three ferromagnetic (F) layers, where the F_1, F_2, and F_3 layers act as the spin injector, detector, and absorber, respectively. We show that the penetration depth can be evaluated by measuring the dependence of the spin signal (magnetoresistance) on the thickness of the F_3 layer.