Influence of Domain Wall on Magnetocaloric Effect in GdPt$_{2}$

TL;DR

This study investigates how magnetic domain walls influence the magnetocaloric effect in GdPt₂, revealing that domain walls have negligible impact on the magnetocaloric properties despite affecting magnetotransport measurements.

Contribution

The paper demonstrates that domain wall contributions are negligible in the magnetocaloric effect of GdPt₂, contrasting with their significant role in magnetotransport properties.

Findings

Domain walls significantly affect resistivity and magnetoresistance.

After removing domain wall effects, magnetocaloric and resistivity behaviors align.

Domain walls have minimal impact on the magnetocaloric effect in GdPt₂.

Abstract

The resistivity, magnetoresistance and in-field heat capacity measurements were performed on GdPt$_{2}$ intermetallic compound. The magnetocaloric parameters $\Delta T_{ad}$ and $-\Delta S$ were derived from the in-field heat capacity data. Comparison has been made between the magnetocaloric effect $-\Delta S$ and difference in resistivity $-\Delta \rho$ $(=\rho(H)-\rho(0))$ as a function of temperature. There is distinct difference in the temperature dependence of $-\Delta S$ and $-\Delta \rho$ below the ferromagnetic transition temperature. However after removing the domain wall contribution from $-\Delta \rho$, the nature of $-\Delta S$ and $-\Delta \rho$ dependence as a function of temperature are similar. Our observation indicates that the domain wall contribution in magnetocaloric effect is negligible in spite of the fact that it has significant contribution in magnetotransport.