# Anomalous anisotropic behaviour of spin-triplet proximity effect in Au/SrRuO$_3$/Sr$_2$RuO$_4$ junctions

## TL;DR

This study investigates the anisotropic magnetic field response of spin-triplet proximity effects in Au/SrRuO3/Sr2RuO4 junctions, revealing the role of d-vector rotation in superconducting spintronics.

## Contribution

It provides the first systematic analysis of magnetic field dependence of triplet correlations in these junctions, highlighting anisotropic behavior linked to d-vector rotation.

## Key findings

- Induced triplet correlations show strong anisotropic field response.
- The anisotropic behavior is attributed to the rotation of the d-vector.
- Results contrast with vortex dynamic behavior.

## Abstract

Spin-polarized supercurrents can be generated with magnetic inhomogeneity at a ferromagnet/spin-singlet-superconductor interface. In such systems, complex magnetic inhomogeneity makes it difficult to functionalise the spin-polarized supercurrents. However, spin-polarized supercurrents in ferromagnet/spin-triplet-superconductor junctions can be controlled by angle between magnetization and spin of Copper pairs ($d$-vector), that can effectively be utilized in developing of a field of research known as superconducting spintronics. Recently, we found induction of spin-triplet correlation into a ferromagnet SrRuO$_3$ epitaxially deposited on a spin-triplet superconductor Sr$_2$RuO$_4$, without any electronic spin-flip scattering. Here, we present systematic magnetic field dependence of the proximity effect in Au/SrRuO$_3$/ Sr$_2$RuO$_4$ junctions. It is found that induced triplet correlations exhibit strong anisotropic field response. Such behaviour attributes to the rotation of the $d$-vector of Sr$_2$RuO$_4$. This anisotropic behaviour is in contrast with the vortex dynamic. Our results will stimulate study of interaction between ferromagnetism and unconventional superconductivity.