Study of magnetic transition and magnetic entropy changes of Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3 compounds

  • Abir. Nasri
  • E. K. Hlil
  • A. -F. Lehlooh
  • M. Ellouze
  • F. Elhalouani
Regular Article

Abstract.

In the present work, we analyze the magnetic transition and magnetic entropy change \( \vert\Delta S_{M}\vert\) 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, \( \vert\Delta S_{M}\vert\) and the Relative Cooling Power (RCP) have been estimated. The maximum of magnetic entropy change \( \vert\Delta S_M^{\max}\vert\) 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 \( \vert\Delta S_{M}\vert\) values evaluated using the Maxwell theory were found in accordance with those calculated by the Landau theory.

Keywords

Manganite Magnetic Transition Magnetic Phase Transition Magnetic Entropy Change Landau Theory 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Abir. Nasri
    • 1
  • E. K. Hlil
    • 2
  • A. -F. Lehlooh
    • 3
  • M. Ellouze
    • 1
  • F. Elhalouani
    • 4
  1. 1.Sfax UniversityFaculty of Sciences of SfaxSfaxTunisia
  2. 2.Institut NéelCNRS et Université Joseph FourierGrenoble cedex 9France
  3. 3.Physics DepartmentYarmouk UniversityIrbidJordan
  4. 4.Sfax UniversityNational School of EngineersSfaxTunisia

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