Anomalous Hall effect in Fe/Cu bilayers

TL;DR

This paper investigates the anomalous Hall effect in Fe/Cu bilayers and finds that traditional scaling laws do not apply due to short-circuit and shunting effects from the non-magnetic layers.

Contribution

It demonstrates that in Fe/Cu bilayers, the anomalous Hall effect deviates from established scaling laws because of specific layer interactions.

Findings

Scaling laws do not hold in Fe/Cu bilayers.

Short-circuit effects influence the anomalous Hall measurements.

Shunting effects alter the expected resistivity behavior.

Abstract

The scaling of anomalous Hall resistivity on the longitudinal resistivity has been intensively studied in the different magnetic systems, including multilayers and granular films, to examine which mechanism, skew scattering or side-jump, dominates. The basis of the scaling law is that both the resistivities are due to the electron scattering at the imperfections in the materials. By studying of anomalous Hall effect (AHE) in the simple Fe/Cu bilayers, we demonstrate that the measured anomalous Hall effect should not follow the scaling laws derived from skew scattering or side-jump mechanism due to the short-circuit and shunting effects of the non-magnetic layers.