Evolution of electrodynamics upon thermal and photo-induced phase transitions in FeRh

FeRh is an antiferromagnetic metal at room temperature, and undergoes magnetic and structural transitions around 370 K accompanied by a change in the electronic property. Photoexcitation also can drive similar changes in structural, magnetic, and electronic properties, and there have been extensive investigations to reveal whether the transitions of these properties occur simultaneously or not. In this work, we investigate evolutions of electrodynamics upon thermal and photo-induced phase transitions. We discuss in detail how electrodynamic properties are influenced by magnetic and structural changes