EPJ Web of Conferences 29, 00051 (2012)
https://doi.org/10.1051/epjconf/20122900051

Structural, magnetic and magnetocaloric properties of Pr_0.6-xEr_xSr_0.4MnO₃ (x = 0.0, 0.1 and 0.2)

¹ Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, Sfax University, B.P. 1171, 3000 Sfax, Tunisia
² Institut NEEL, B.P. 166, 38042 Grenoble Cedex 9, France

^a e-mail: abdcheikhrouhou@yahoo.fr

Abstract

We investigate the effect of Erbium doping on the structural, magnetic and magnetocaloric properties of Pr_0.6-xEr_xSr_0.4MnO₃ (x = 0.0, 0.1 and 0.2) powder samples. Our polycrystalline samples were synthesized using the solid-state reaction at high temperature. X-ray diffraction characterizations showed that all our studied samples crystallize in the distorted orthorhombic system with Pnma space group. All our synthesized samples exhibit a paramagnetic-ferromagnetic transition with decreasing temperature. The magnetic transition temperature T_C is found to decrease continuously with increasing Er concentration. It was found that the maximum value of the magnetic entropy change for Pr_0.6-xEr_xSr_0.4MnO₃ sample reached $\left|\Delta S_M^{\max }\right|=2.40{\text{J kg}}^{-1}{\text{K}}^{-1}$ in a magnetic applied filed of 2T.