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

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

2006-04-12

arxiv.org/abs/cond-mat/0604297v1

Physics

Condensed Matter

Materials Science

RevTex 4 pages, 6 figures

Scientific paper

10.1103/PhysRevB.74.132405

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.

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