Exploring the Anomalous Nernst Effect in SrRuO$_3$

TL;DR

This study explores the anomalous Nernst effect in SrRuO$_3$ thin films and polycrystalline samples, revealing the influence of magnetic anisotropy and Berry curvature on thermoelectric responses near the Curie temperature.

Contribution

It provides new insights into how magnetic anisotropy affects the Berry curvature and the anomalous Nernst effect in SrRuO$_3$ thin films and bulk samples.

Findings

Pronounced Nernst signal near $T_c$ in (111) SrRuO$_3$ films

Magnetic anisotropy significantly influences the Nernst response

Temperature and field dependence highlight Berry curvature effects

Abstract

We investigate the anomalous Nernst effect in epitaxial SrRuO$_3$ thin films grown on c-cut Al$_2$O$_3$ substrates, and in a polycrystalline SrRuO$_3$ slab. Through comprehensive measurements of the transverse thermoelectric response as a function of temperature and magnetic field, we observe a pronounced Nernst signal near $T_c$ in the (111) oriented SrRuO$_3$ thin films. The strong temperature and nontrivial field dependence underscore the pivotal role of the magnetic anisotropy in tuning the Berry curvature and, consequently, the anomalous Nernst effect in SrRuO$_3$.