Anisotropic supercurrent due to inhomogeneous magnetization in ferromagnet/superconductor junctions

TL;DR

This paper explores how inhomogeneous magnetization in ferromagnet/superconductor junctions induces transverse charge and spin supercurrents, revealing unique effects distinct from the anomalous Hall effect.

Contribution

It demonstrates that inhomogeneous magnetic structures can generate anisotropic supercurrents, a novel insight into superconductor-ferromagnet interactions.

Findings

Transverse charge supercurrents depend on magnetic inhomogeneity.

Magnetic structures influence supercurrent direction and magnitude.

Distinct from anomalous Hall effect due to dissipationless nature.

Abstract

We investigate transverse charge and spin dc supercurrents in a ferromagnet coupled to a superconductor where the ferromagnet has inhomogeneous magnetic structure. These transverse supercurrents arise from non-trivial structure of the magnetization. The magnetic structure manifested in the transverse charge supercurrent is essentially different from that discussed in the context of anomalous Hall effect, reflecting the disspationless nature of supercurrent. Possible candidates of magnetic structure to verify our prediction are also discussed.