Abstract
We investigate the baroentropy change on manganites (delta S-b(M) and delta S-b(M)-rho) using modified form of Maxwell's equation through magnetization and magnetization-resistivity measurements. Hence, we choose two Mnsite doped pervoskite manganites Pr0.6Ca0.4Mn0.96Co0.04O3 and Pr0.6Ca0.4Mn0.96Co0.04O3 due to strong correlation between magnetic and electrical properties. The two external perturbations such as magnetic field and hydrostatic pressure have a similar influence on magnetic and transport properties of manganite systems due to its strong coupling between spin, charge, and orbital degrees of freedom. Baroentropy change, similar to magneto entropy change, could be estimated by replacing magnetic field in Maxwell's equation by pressure in perovskite manganites. The estimated values of & UDelta;SbM and & UDelta;SbM-rho using proposed equations well agree with each other, justifying the use of these equations. As these values are deduced from pressure dependent magnetization and resistivity measurements, this method of baroentropy change estimation is very useful as well as reliable in order to select application-oriented systems from the manganites family. (C)& nbsp;2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier