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

Abstract

The resistivity, magnetoresistance and in-field heat capacity measurements were performed on GdPt$_{2}$ intermetallic compound. The magnetocaloric parameters $ΔT_{ad}$ and $-ΔS$ were derived from the in-field heat capacity data. Comparison has been made between the magnetocaloric effect $-ΔS$ and difference in resistivity $-Δρ$ $(=ρ(H)-ρ(0))$ as a function of temperature. There is distinct difference in the temperature dependence of $-ΔS$ and $-Δρ$ below the ferromagnetic transition temperature. However after removing the domain wall contribution from $-Δρ$, the nature of $-ΔS$ and $-Δρ$ 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.