https://doi.org/10.1140/epjp/i2016-16110-y
Regular Article
Study of magnetic transition and magnetic entropy changes of Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3 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
In the present work, we analyze the magnetic transition and magnetic entropy change of Pr0.6Sr0.4Mn1-x
Fe
x
O3 samples. Using Arrott plots, we report that the phase transition for Pr0.6Sr0.4MnO3 sample is of second order, while the Pr0.6Sr0.4Mn0.9Fe0.1O3 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 Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3, 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.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2016