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Document IIF

Structure cristalline et transformation de la phase structurelle dans du Gd(5)Si(1,8)Ge(1,8)Sn(0,4).

The crystal structure and structural phase transformation in Gd(5)Si(1.8)Ge(1.8)Sn(0.4).

Auteurs : TANG Y. B., ZHANG T. B., CHEN Y. G., et al.

Résumé

This MCE alloy was prepared by the arc-melt method. Based on the step-scanned high resolution powder X-ray diffraction data, the crystal structure of this alloy has been determined with the help of Rietveld refinement. the structure analysis indicates the T-T bond connecting Gd5T4 (T: Si, Ge, Sn) in this alloy is a little longer comparing with that of the Gd5Si2Ge2 alloy. Temperature dependent XRD indicates that Gd(5)Si(1.8)Ge(1.8)Sn(0.4) performs monoclinic-orthorhombic structural transition accompanying the magnetic transition near curie temperature. It is believed the first order magnetic-crystallographic transition could be triggered easily and the large magnetocaloric effect at a low magnetic field change is obtained in this alloy with Gd5Si2Ge2-type crystal structure.

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Pages : 2010-4

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Détails

  • Titre original : The crystal structure and structural phase transformation in Gd(5)Si(1.8)Ge(1.8)Sn(0.4).
  • Identifiant de la fiche : 2011-0181
  • Langues : Anglais
  • Source : 4th International Conference on Magnetic Refrigeration at Room Temperature (Thermag IV). Proceedings: Baotou, China, August 23-27, 2010.
  • Date d'édition : 23/08/2010

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