Texture-induced enhancement of the magnetocaloric response in melt-spun DyNi2 ribbons

The magnetocaloric properties of melt-spun ribbons of the Laves phase DyNi2 have been investigated. The as-quenched ribbons crystallize in a single-phase MgCu2-type crystal structure (C15; space group Fd3¯m) exhibiting a saturation magnetization and Curie temperature of MS = 157 ± 2 A m2 kg−1 and TC...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2013-10, Vol.103 (15)
Main Authors: Ibarra-Gaytan, P. J., Sánchez-Valdes, C. F., Sánchez Llamazares, J. L., Álvarez-Alonso, Pablo, Gorria, Pedro, Blanco, J. A.
Format: Article
Language:English
Subjects:
Curie temperature
Entropy
Magnetic fields
Melt spinning
Refrigerants
Reinforced concrete
Ribbons
Saturation (magnetic)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The magnetocaloric properties of melt-spun ribbons of the Laves phase DyNi2 have been investigated. The as-quenched ribbons crystallize in a single-phase MgCu2-type crystal structure (C15; space group Fd3¯m) exhibiting a saturation magnetization and Curie temperature of MS = 157 ± 2 A m2 kg−1 and TC = 21.5 ± 1 K, respectively. For a magnetic field change of 2 T, ribbons show a maximum value of the isothermal magnetic entropy change |ΔSMpeak| = 13.5 J kg−1 K−1, and a refrigerant capacity RC = 209 J kg−1. Both values are superior to those found for bulk polycrystalline DyNi2 alloys (25% and 49%, respectively). In particular, the RC is comparable or larger than that reported for other potential magnetic refrigerants operating at low temperatures, making DyNi2 ribbons promising materials for use in low-temperature magnetic refrigeration applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4824073