Alternating current Hanle effect as poor man's paramagnetic resonance

TL;DR

This paper demonstrates that the interplay between magnetic fields and alternating current in spin injection experiments can reveal material-specific electron g-factors through observable features in interface resistance, simplifying measurements.

Contribution

It introduces a method to measure electron g-factors using AC-driven spin precession effects at a single ferromagnet/normal metal interface, reducing experimental complexity.

Findings

Observable features in interface resistance at specific frequencies

Material-specific g-factors can be extracted from these features

The method simplifies g-factor measurement process

Abstract

It is shown that in spin injection experiments the interplay between external magnetic field and alternating current can be observed already on a single ferromagnet/normal metal interface. The interface resistance is predicted to exhibit prominent features whenever the frequency of spin precession in the applied field becomes equal to the frequency of the driving current. Using these features, material-specific g-factors of electrons in normal metals can be measured with less effort, albeit also with less precision.