Ferromagnetic properties of SrRuO3 thin films deposited on the spin-triplet superconductor Sr2RuO4

TL;DR

This study investigates the magnetic properties of SrRuO3 thin films grown on Sr2RuO4, revealing ferromagnetism near 160 K, enhanced magnetization, and anisotropic relaxation behaviors, contributing to understanding ferromagnetism in heterostructures.

Contribution

First demonstration of ferromagnetic SrRuO3 thin films on Sr2RuO4 with detailed magnetic relaxation analysis.

Findings

Ferromagnetic transition near 160 K in thin films.

Magnetization exceeds that of bulk SrRuO3.

Strong anisotropic relaxation of magnetization.

Abstract

We report magnetic properties of epitaxial thin films of the itinerant ferromagnet SrRuO3 deposited on the cleaved ab surface of the spin-triplet superconductor Sr2RuO4. The films exhibit ferromagnetic transition near 160 K as in the bulk SrRuO3, although the films are under 1.7% compressive strain. The observed magnetization is even higher than that of the bulk SrRuO3. In addition, we newly found that the magnetization relaxation after field removal is strongly anisotropic: two relaxation processes are involved when magnetic domains are aligned along the ab-plane.