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Influence d'un champ magnétique appliqué aux transitions structurelles dans des composés de RCo(2) (R = Dy, Ho, Er).

Influence of an applied magnetic field on the structural transitions in RCo(2) (R= Dy, Ho, Er) compounds.

Auteurs : MUDRYK Y., PECHARSKY V. K., GSCHNEIDNER K. A. Jr

Résumé

Application of an external magnetic field decreases the degree of lattice distortions in RCo(2) compounds (R= Dy, Ho, Er) promoting the formation of the cubic phase. The unit-cell volume changes are sharper in HoCo(2) and ErCo(2) than in DyCo(2) where the transition becomes of a second-order in magnetic fields higher than 4 T in agreement with reported DSC and heat capacity results. The apparent change of the transition order in applied magnetic field does not have much effect on the magnetocaloric properties; however, the size of the volume change in zero magnetic field is an important characteristic of the material with respect to its magnetocaloric properties.

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Pages : 2009-3

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Détails

  • Titre original : Influence of an applied magnetic field on the structural transitions in RCo(2) (R= Dy, Ho, Er) compounds.
  • Identifiant de la fiche : 2009-1591
  • Langues : Anglais
  • Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
  • Date d'édition : 11/05/2009

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