Magnetocaloric properties in Ln(0.67)Ba(0.33)Mn(1-x)Fe(x)O(3) (Ln = La or Pr) manganites - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Materials Letters Année : 2011

Magnetocaloric properties in Ln(0.67)Ba(0.33)Mn(1-x)Fe(x)O(3) (Ln = La or Pr) manganites

Résumé

We have investigated the magnetocaloric properties of Ln(0.67)Ba(0.33)Mn(1-x)Fe(x)O(3) (Ln = La or Pr) manganites with x=0 and 0.05. All compounds present a maximum and large magnetocaloric effect near the Curie temperature (T-C). The associated maximum value of the magnetic entropy change, at 5 T applied change in the magnetic field, is 4.37 J.kg(-1).K-1 for Pr0.67Ba0.33MnO3 manganite with a T-C value of 205 K. The corresponding relative cooling power (RCP) reaches 230 J.kg(-1). All the samples present similar RCP values that are relatively high and are promising materials to be used in ecologically friendly magnetic refrigeration technology. Iron doping reduces both T-C and Delta S-M(max) and spreads the temperature working range with an almost constant RCP and can then be used to tune the working conditions of a refrigerator device. (C) 2011 Elsevier B.V. All rights reserved.

Domaines

Matériaux

Dates et versions

hal-01067574 , version 1 (23-09-2014)

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Citer

M. Baazaoui, Michel Boudard, S. Zemni. Magnetocaloric properties in Ln(0.67)Ba(0.33)Mn(1-x)Fe(x)O(3) (Ln = La or Pr) manganites. Materials Letters, 2011, 65 (14), pp.2093-2095. ⟨10.1016/j.matlet.2011.04.051⟩. ⟨hal-01067574⟩
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