Observation of tunable exchange bias in Sr$_2$YbRuO$_6$

TL;DR

This study reports the tunable exchange bias in Sr₂YbRuO₆, a double perovskite, where the exchange bias can be controlled by temperature and initial cooling field, showing potential for magnetic device applications.

Contribution

It demonstrates the temperature-dependent tunability of exchange bias in Sr₂YbRuO₆, revealing a crossover from positive to negative bias across the compensation temperature.

Findings

Exchange bias can be tuned by temperature and cooling field.

Positive exchange bias crosses over to negative above the compensation temperature.

Magnetic moments exhibit reversal and negative magnetization due to magnetic compensation.

Abstract

The double perovskite compound, Sr$_{2}$YbRuO$_{6}$, displays reversal in the orientation of magnetic moments along with negative magnetization due to an underlying magnetic compensation phenomenon. The exchange bias (EB) field below the compensation temperature could be the usual negative or the positive depending on the initial cooling field. This EB attribute has the potential of getting tuned in a preselected manner, as the positive EB field is seen to crossover from positive to negative value above $T_{\mathrm{comp}}$.