Magnetocaloric Effect in Perovskite Manganite La0.67−xEuxSr0.33MnO3

In this paper, the magnetocaloric effect of perovskite manganite La0.67−xEuxSr0.33MnO3(x= 0.1 and x= 0.2) has been investigated. From the measurement of isothermal magnetization around the Curie temperature, we have calculated the maximum isothermal magnetic entropy change The maximum magnetic entropy change ΔSMmax\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}${\Delta } S_{\mathrm {M}}^{\max }$\end{document} is found to increase with increasing of Eu content from 4.10 J/kg K for x= 0.1 J/kg K and 4.33 J/kg K for x= 0.2 upon 5 T applied field change. It is suggested that La0.67−xEuxSr0.33MnO3are suitable candidates as refrigerants near room temperature region.