Determination of the magnetocaloric effect from thermophysical parameters and their relationships near magnetic phase transition in doped manganites

• Published in: Journal of magnetism and magnetic materials 2020-11, Vol.513, p.167209, Article 167209
• Main Authors: Gamzatov, A.G., Batdalov, A.B., Aliev, A.M., Yen, P.D.H., Gudina, S.V., Neverov, V.N., Thanh, T.D., Dung, N.T., Yu, S.-C., Kim, D.-H., Phan, M.H.
• Format: Article
• Language: English
• Subjects: Ferromagnetic materials; Magnetic entropy change; Magnetic materials; Magnetoresistance; Magnetostriction; Manganites; Parameters; Phase transitions; Thermal conductivity; Thermal diffusivity; Transition temperature
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2020.167209

•Direct and indirect measurements magnetocaloric effect in Pr0.7Sr0.2Ca0.1MnO3.•Specific heat, thermal diffusivity, thermal conductivity, resistivity Pr0.7Sr0.2Ca0.1MnO3.•Correlation of the MCE and thermophysical properties near the FM-PM phase transition.•The giant value of the RCP ~814 J/kg for the Pr0.7Sr0.2Ca0.1MnO3 sample at H = 80 kOe. We present the results of a comparative analysis of the magnetocaloric effect (MCE) in Pr0.7Sr0.2Ca0.1MnO3, through direct and indirect measurements, using experimentally measured magnetization, specific heat, magnetostriction, resistivity, thermal diffusivity and thermal conductivity parameters. We have demonstrated that the change in each parameter in response to a magnetic field near the ferromagnetic-paramagnetic phase transition temperature of the material correlates with the change in magnetic entropy. These findings allow us to interrelate these parameters and provide an alternative, effective approach for accessing the usefulness of magnetocaloric materials.