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Magnetocaloric effect in RNi2 melt-spun ribbons (R=Dy, Tb).

Number: 1664

Author(s) : SÁNCHEZ LLAMAZARES J. L., IBARRA-GAYTÁN P. J., SÁNCHEZ-VALDÉS C. F., et al.

Summary

In this work we report the magnetocaloric behavior of rapidly solidified polycrystalline alloy ribbons of the RNi2 Laves phase (R = Dy, Tb). They crystallize in a C15 cubic MgCu2-type structure (space group Fd-3m) and a superstructure of the Laves phase (space group F-43m), respectively. For a magnetic field change of 2 T the intermetallic compound DyNi2 (TbNi2) shows a magnetic entropy change (?SM peak) of 13.5 J kg-1 K-1 (8.0 J kg-1 K-1) and a RC-1 of 209 J kg-1 (166 J kg-1). While the magnetocaloric response of TbNi2 ribbons is similar to that reported for bulk alloys, in the case of DyNi2 the anisotropic behavior of magnetization together with the crystallographic texture induced during the melt-spinning fabrication process combine favorably to improve |?SM peak| (25%) and RC-1 (49 %) for a magnetic field change of 2 T, with respect to data reported for bulk alloys.

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Details

  • Original title: Magnetocaloric effect in RNi2 melt-spun ribbons (R=Dy, Tb).
  • Record ID : 30012891
  • Languages: English
  • Source: 6th International Conference on Magnetic Refrigeration at Room Temperature (Thermag VI). Proceedings: Victoria, Canada, September 7-10, 2014.
  • Publication date: 2014/09/07

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