Eur. Phys. J. Plus (2016) 131: 110
https://doi.org/10.1140/epjp/i2016-16110-y

Regular Article

Study of magnetic transition and magnetic entropy changes of Pr_0.6Sr_0.4MnO₃ and Pr_0.6Sr_0.4Mn_0.9Fe_0.1O₃ compounds

¹ Sfax University, Faculty of Sciences of Sfax, B. P. 1171, 3000, Sfax, Tunisia
² Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042, Grenoble cedex 9, France
³ Physics Department, Yarmouk University, 211 63, Irbid, Jordan
⁴ Sfax University, National School of Engineers, LASEM B.P. W, 3038, Sfax, Tunisia

^* e-mail: ennasri.a@gmail.com

Received: 30 April 2015
Accepted: 5 March 2016
Published online: 21 April 2016

Abstract

In the present work, we analyze the magnetic transition and magnetic entropy change of Pr_0.6Sr_0.4Mn_1-x Fe _x O₃ samples. Using Arrott plots, we report that the phase transition for Pr_0.6Sr_0.4MnO₃ sample is of second order, while the Pr_0.6Sr_0.4Mn_0.9Fe_0.1O₃ sample exhibits a first-order magnetic phase transition. From the magnetization measurements at temperature close to the Curie temperature, the magnetic entropy change, and the Relative Cooling Power (RCP) have been estimated. The maximum of magnetic entropy change reaches, under an applied magnetic field of 5T, 3.58 and 3.66J/kg K for Pr_0.6Sr_0.4MnO₃ and Pr_0.6Sr_0.4Mn_0.9Fe_0.1O₃, respectively. The RCP values have been estimated to 159.37 and 223.52J/kg. For both samples, the values evaluated using the Maxwell theory were found in accordance with those calculated by the Landau theory.