Partager

Document IIF

Effet magnétocalorique négatif dans les composés de Fe(1-x)Rh(x).

Negative magnetocaloric effect in Fe(1-x)Rh(x) compounds.

Auteurs : BALLI M., FRUCHART D., GIGNOUX D., et al.

Résumé

On increasing temperature, the Fe(1-x)Rh(x) alloys present a transition from an antiferromagnetic to a ferromagnetic state, which induces a negative magnetocaloric effect (MCE). The magnetocaloric effect, in particular of the Fe(0.49)Rh(0.51) alloy, was studied by direct measurements and according to specific heat measurements. The authors report the recent results obtained on the annealed Fe(0.48)Rh(0.52) compound we prepared by arc melting. The isothermal entropy change delta-S allowing an estimation of the MCE was determined from magnetic measurements. The delta-S experimentally found is larger than that reported for the annealed Fe(0.49)Rh(0.51) sample. However a significant difference occurs between transition temperature of the annealed sample Fe(0.48)Rh(0.52) and that reported in literature. This result shows that magnetic and magnetocaloric properties in this kind of materials are very sensitive to the technique of samples preparation. Besides, the magnetocaloric effect close the ferromagnetic-paramagnetic transition in Fe(0.48)Rh(0.52) is also discussed.

Documents disponibles

Format PDF

Pages : 2007-1

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Negative magnetocaloric effect in Fe(1-x)Rh(x) compounds.
  • Identifiant de la fiche : 2007-1594
  • Langues : Anglais
  • Source : 2nd International Conference on Magnetic Refrigeration at Room Temperature
  • Date d'édition : 11/04/2007

Liens


Voir d'autres communications du même compte rendu (48)
Voir le compte rendu de la conférence

Indexation