Critical behavior and magnetic entropy change in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 perovskite - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Magnetism and Magnetic Materials Année : 2012

Critical behavior and magnetic entropy change in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 perovskite

Sonia Ben Abdelkhalek
  • Fonction : Auteur
Nabil Kallel
  • Fonction : Auteur
Sami Kallel
  • Fonction : Auteur
Mohamed Oumezzine
  • Fonction : Auteur

Résumé

Critical behavior in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 ceramics was studied using magnetization methods. Results show that the paramagnetic-ferromagnetic transition is of second order. Based on the critical behavior analysis using the Banerjee criterion and the Kouvel-Fisher method, we find the critical exponents: β=0.395±0.010, γ=1.402±0.010, and δ=5.208±0.007, for which the magnetic interaction is satisfied within the three-dimensional Heisenberg model. Results indicate the presence of short-range interactions. The magnetic entropy change (−ΔSM) reached maximum values of 1.75, 1.45, 1.15, 0.8 and 0.43 J Kg−1 K−1 under a magnetic field variation of 5, 4, 3, 2 and 1 T, respectively. Nevertheless, these (−ΔSM) values are much low for any potential application at this moment. The nature of this phenomenon is discussed in relation to the characteristics of the magnetic phase transition and critical exponents.

Domaines

Matériaux

Dates et versions

hal-00821908 , version 1 (13-05-2013)

Identifiants

Citer

Sonia Ben Abdelkhalek, Nabil Kallel, Sami Kallel, Octavio Peña, Mohamed Oumezzine. Critical behavior and magnetic entropy change in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 perovskite. Journal of Magnetism and Magnetic Materials, 2012, 324 (22), pp.3615-3619. ⟨10.1016/j.jmmm.2012.06.024⟩. ⟨hal-00821908⟩
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