Magnetocaloric-Transport Properties Correlation in La0.8 Ca0.2MnO3-Doped Manganites

Abstract

This investigation is interested in studying the relation between magnetocaloric effect and transport properties i La0.8Ca0.2MnO3 manganite compound. The value of the magnetocaloric effect has been determined from the calculation of magnetization as a function of temperature under different external magnetic fields. This study also provides an alternative method to determine the magnetocaloric properties such as magnetic entropy change and heat capacity change on the basis of M(T, H) measurements. On the other hand, based on magnetic and resistivity measurements, the magnetocaloric properties of this compound were investigated using an equation of the form ΔS=0H[δLn(ρ)δT]HdH, which relates magnetic order to transport behavior of the compounds. As an important result, the values of MCE and the results of calculation are in good agreement with the experimental ones, which indicates the strong correlation between the electric and magnetic properties in manganites.