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Variation induite par l'hydrogénation dans la structure cristalline et la capacité thermique d'Er3Ni, un matériau magnétique régénératif.

Hydrogenation-induced variation in crystal structure and heat capacity of magnetic regenerative material Er3Ni.

Auteurs : JIN T., LI C. H., TANG K., et al.

Type d'article : Article

Résumé

In order to analyze the influence of hydrogenation on magnetic regenerative material Er3Ni, the structures of Er3Ni and its hydrides Er3NiHx are tested by X-ray diffraction, and their magnetic properties and heat capacities are measured by a magnetic property measurement system and by a physical property measurement system, respectively. The results show that different crystal structures can be formed by the hydrogenation at 293 K, while the Er3NiHx does not go through magnetic transition above 2 K. The Er3NiHx exhibits different specific heat features with that of original compound Er3Ni, which could be attributed to the absence of magnetic transition and other effects caused by hydrogenation. The insertion of hydrogen atoms can lead to a larger specific heat than that of Er3Ni in some certain temperature range. [Reprinted with permission from Elsevier. Copyright, 2011].

Détails

  • Titre original : Hydrogenation-induced variation in crystal structure and heat capacity of magnetic regenerative material Er3Ni.
  • Identifiant de la fiche : 30001993
  • Langues : Anglais
  • Source : Cryogenics - vol. 51 - n. 5
  • Date d'édition : 05/2011
  • DOI : http://dx.doi.org/10.1016/j.cryogenics.2011.03.002

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