Correlation between electrical, magnetocaloric properties and critical behavior in (La0.75Nd0.25)2/3(Ca0.8Sr0.2)1/3MnO3

An investigation of the critical behavior and magnetic entropy from resistivity of (La0.75Nd0.25)2/3(Ca0.8Sr0.2)1/3MnO3 is presented. The magnetocaloric properties of the polycrystalline manganite (La0.75Nd0.25)2/3(Ca0.8Sr0.2)1/3MnO3 based on resistivity measurements were investigated. Using, the equation ΔS=−α∫0H∂Ln(ρ)∂T)HdH relates magnetic order to the transport behavior of the compound, we measure the magnetic entropy change ΔSM from the resistivity which is similar to that calculated from the magnetic measurement. Moreover, we have found an excellent estimation of critical behavior from resistivity and magnetic analysis.