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Journal of Materials Science
Published in: Journal of Materials Science 4/2016

01-02-2016 | Original Paper

Magnetic and magnetocaloric properties of GdNi x Al2−x (0.35 ≤ x ≤ 0.70) alloys with multiphase structure

Authors: Z. Ma, Y. F. Shang, E. A. Balfour, Y. H. Wu, H. Fu, Y. Luo, S. F. Wang, B. H. Teng, M. G. Han

Published in: Journal of Materials Science | Issue 4/2016

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Abstract

The multiphase GdNi x Al2−x (0.35 ≤ x ≤ 0.70) compounds were synthesized, and the relationship between the composition and magnetic and magnetocaloric properties of the as-cast alloys was subsequently established in this work. For the alloys with composition close to the GdNiAl-end, large magnetic entropy changes occur. Decreasing ratio of Ni to Al induces considerable refrigerant capacity due to the large broadening of temperature range of the phase transitions. In particular, a plateau-shaped magnetocaloric feature was found in the fully crystalline GdNi0.40Al1.60 alloy composed of three ferromagnetic phases. The maximum magnetic entropy change and refrigerant capacity of the as-cast GdNi0.40Al1.60 alloy are 8.8 J/kg K and 567 J/kg, respectively, for magnetic field change of 50 kOe. The good “table-like” magnetocaloric response makes it a promising refrigerant candidate for Ericsson cycle-based magnetic refrigeration at low temperatures. Furthermore, this type of material promises to provide a cost-effective strategy for the search of efficient magnetic refrigerants with table-like magnetocaloric feature, beneficial for Ericsson cycle.
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Metadata
Title
Magnetic and magnetocaloric properties of GdNi x Al2−x (0.35 ≤ x ≤ 0.70) alloys with multiphase structure
Authors
Z. Ma
Y. F. Shang
E. A. Balfour
Y. H. Wu
H. Fu
Y. Luo
S. F. Wang
B. H. Teng
M. G. Han
Publication date
01-02-2016
Publisher
Springer US
Published in
Journal of Materials Science / Issue 4/2016
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-015-9523-x

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