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Article Dans Une Revue Materials Letters Année : 2010

Large magnetocaloric effect in Ti-modified La0.70Sr0.30MnO3 perovskite

Sami Kallel
  • Fonction : Auteur
Nabil Kallel
  • Fonction : Auteur
Mohamed Oumezzine
  • Fonction : Auteur

Résumé

The effect of Ti substitution on the magnetocaloric effect of the La0.70Sr0.30MnO3 perovskite was investigated. The magnetic entropy change (− ΔSM) was deduced by two methods: a Maxwell relation and the Landau theory. The magnetocaloric data displays a large value of the magnetic entropy change (− ΔSM) near the Curie temperature (TC = 210 K), which increases when increasing the applied magnetic field. A good agreement is found between the experimental (− ΔSM) and the one estimated by Landau theory. The relative cooling power values vary from 49 to 288 J kg− 1 upon variation of the applied magnetic field at 1 and 5 T. Under 5 T, the relative cooling power value for La0.70Sr0.30Mn0.90Ti0.10O3 is about 70% of the conventional refrigerant Gd material. As a result, the herein reported compound can be considered as a promising material in magnetic refrigeration technology.

Domaines

Matériaux

Dates et versions

hal-00829586 , version 1 (03-06-2013)

Identifiants

Citer

Sami Kallel, Nabil Kallel, Octavio Peña, Mohamed Oumezzine. Large magnetocaloric effect in Ti-modified La0.70Sr0.30MnO3 perovskite. Materials Letters, 2010, 64 (9), pp.1045-1048. ⟨10.1016/j.matlet.2010.02.005⟩. ⟨hal-00829586⟩
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