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Etude d'alliages de Gd-Y pour l'utilisation dans un cycle de régénération magnétique active.

Study of Gd-Y alloys for use in cycle of active magnetic regeneration.

Auteurs : KITO S., NAKAGOME H., KOBAYASHI T., et al.

Résumé

Until now, gadolinium (Gd) has been used as a magnetic refrigerant in room temperature magnetic refrigeration studies based on the active magnetic regeneration (AMR) cycle. However, with this material, the working temperature region is restricted by the value of magnetic entropy change, which shows a sharp peak near the Curie temperature (TC). In order to expand the working temperature region of Gd, it may be possible to use layered structures of magnetic refrigerants with different TC so as to achieve a broader region of magnetic entropy change. In this study, the authors analyzed the TC and magnetic entropy change of Gd-Y alloys to identify suitable magnetic refrigerants for use in a layered structure. Details are presented which show that the TC of Gd-Y alloys is easily controllable, and that the refrigerating capacity of Gd-Y alloys is almost equivalent to that of Gd.

Détails

  • Titre original : Study of Gd-Y alloys for use in cycle of active magnetic regeneration.
  • Identifiant de la fiche : 2008-1051
  • Langues : Anglais
  • Date d'édition : 14/06/2006
  • Source : Source : Proc. 14th int. Cryocooler Conf., Annapolis, MD
    549-553; fig.; 7 ref.

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