Anomalous metamagnetic-like transition in a FeRh/Fe$_3$Pt interface occurring at T120 K in the field-cooled-cooling curves for low magnetic fields

TL;DR

This study reports an unusual metamagnetic-like transition at 120 K in a FeRh/Fe3Pt interface, observed during field-cooled cooling curves under low magnetic fields, revealing novel magnetic behavior in this layered system.

Contribution

It uncovers an anomalous magnetic transition in FeRh/Fe3Pt thin films occurring at 120 K during field-cooled cooling, a behavior not previously documented in such configurations.

Findings

Anomalous magnetization behavior near 120 K in FeRh/Fe3Pt.

Transition occurs only in field-cooled-cooling curves at low fields.

No heat treatment required for the observed effect.

Abstract

We report on the magnetic properties of a special configuration of a FeRh thin film. An anomalous behavior on the magnetisation vs. temperature was observed when low magnetic fields are applied in the plane of a thin layer of FeRh deposited on ordered Fe$_3$Pt. The anomalous effect resembles a metamagnetic transition and occur only in the field-cooled-cooling magnetisation curve at temperatures near 120 K in samples without any heat treatment.