# Interface induced exchange bias effect in La$_{0.67}$Sr$_{0.33}$MnO$_3$/SrIrO$_3$ multilayer

## TL;DR

This study reports the discovery of an interface-induced exchange bias effect in La$_{0.67}$Sr$_{0.33}$MnO$_3$/SrIrO$_3$ multilayers, revealing complex magnetic interactions and temperature-dependent behavior in epitaxial superlattices.

## Contribution

It demonstrates the occurrence of exchange bias effects in ferromagnetic/paramagnetic multilayers and explores their temperature and field dependence, highlighting the role of interface magnetic interactions.

## Key findings

- Exchange bias observed in both field cooled and zero field cooled loops.
- Opposite loop shifts in different measurement conditions.
- Exchange bias vanishes near the interface magnetic ordering temperature.

## Abstract

Epitaxial superlattices of ferromagnetic/paramagnetic La$_{0.67}$Sr$_{0.33}$MnO$_3$/SrIrO$_3$ materials have been prepared on SrTiO$_3$ (100) substrate using pulse laser deposition technique. An unexpected onset of interface magnetic interaction has been observed around 40 K. Interestingly, magnetic exchange bias effect has been observed in both field cooled and zero field cooled magnetization loops, however, the shifting of loop is opposite in both measurements. Exchange bias field vanishes as temperature increases to interface magnetic ordering temperature. Moreover, exchange bias field is found to decrease with increasing cooling field. We believe that tuning of magnetic exchange at interface during field cooling induces this evolution in nature of exchange bias field.