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Effet magnétocalorique dans des rubans amorphes à base de Co.

Magnetocaloric effect in Co-based amorphous ribbons.

Auteurs : BUCHELNIKOV V. D., TASKAEV S. V., BYCHKOV I. V., et al.

Résumé

In this work, the authors studied Co(82.9)Si(5.9)Fe(4.5)Cr(4B(2.7). amorphous ribbon that have maximal magnetocaloric effect near room temperature. The maximum value of magnetic entropy change calculated from the M(H) curves using the Maxwell relation is 0.625 J/kg.K at the Curie temperature 302 K in the magnetic field 2 T. Considerable magnetic entropy change, larger than 0.5 J/kg.K, is observed in this ribbon in wide temperature interval: from 280 to 320 K. The authors have also measured the adiabatic temperature change by two direct methods. In the first case they obtained the maximum value of adiabatic temperature change ot about 0.1 K at changing of the magnetic field from 0 to 1.1 T. In the second case, the maximum value of the adiabatic temperature change was found to be approximately 0.24 K near room temperature in the magnetic field 2 T. In the temperature interval from 280 to 320 K the value of adiabatic temperature change is larger than 0.05 K in first case and about 0.2 K in second one.

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Pages : 2009-3

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Détails

  • Titre original : Magnetocaloric effect in Co-based amorphous ribbons.
  • Identifiant de la fiche : 2009-1595
  • Langues : Anglais
  • Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
  • Date d'édition : 11/05/2009

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