Partager

Document IIF

Changements d'entropie magnétique dans du Ni(2+x)Mn(1-x)Ga avec transition de phase magnétostructurale couplée selon la composition.

Compositional dependence of magnetic entropy change in Ni(2+x)Mn(1-x)Ga with coupled magnetostructural phase transition.

Auteurs : KHOVAYLO V., KOLEDOV V., SHAVROV V., et al.

Résumé

The authors report on magnetocaloric properties of this compound undergoing a first-order phase transition from ferromagnetic martensite to paramagnetic austenite. Experimental results obtained revealed that magnetic entropy change delta-S(M) calculated from isothermal magnetization curves is largest in the alloys with x= 0.18 - 0.20. delta-S(M) in the alloys with a higher Ni excess was found to be considerably smaller. Direct measurements of the adiabatic temperature change delta-T in these alloys revealed similar tendency. The observed experimental results are attributed to the fact that with increasing Ni excess x, simultaneous decrease in magnetization saturation and in the lattice entropy change at martensitic transformation temperature is observed.

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 : Compositional dependence of magnetic entropy change in Ni(2+x)Mn(1-x)Ga with coupled magnetostructural phase transition.
  • Identifiant de la fiche : 2007-1592
  • 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