Comparative studies of magnetocaloric effect and magnetotransport behavior in $GdRu2Si2$ compound

Studies on magnetocaloric effect (change in magnetic entropy $ΔS$⁠) and magnetotransport (difference in resistivity due to magnetic field $Δρ$⁠) have been performed on polycrystalline $GdRu2Si2$⁠. Due to the presence of several field-induced metamagnetic transitions and superzone energy gap effect below the antiferromagnetic transition temperature $(∼45K)$⁠, the system exhibits complex magnetotransport behavior. Such a complicated magnetotransport behavior has been analyzed by the comparative studies on $Δρ$ and $ΔS$⁠. The anomalous regions of $Δρ$⁠, where it is not dominated by the change in the orientation of magnetic moments, have been highlighted by showing the difference in the variation in $ΔS$ and $Δρ$⁠. The origin of similar and dissimilar behaviors of $ΔS$ and $Δρ$ at different regions of temperature and magnetic field has been discussed. The comparative study of $ΔS$ and $Δρ$ indicates that it is a powerful technique to understand the complex magnetotransport behavior of the magnetic materials. Interestingly, the intricate magnetic phase diagram of $GdRu2Si2$ generated by taking magnetization, magnetotransport, or magnetocaloric data appeared to be identical, indicating the usefulness of these physical quantities to generate magnetic phase diagram.