skip to main content

Title: Table-like magnetocaloric effect in Gd{sub 56}Ni{sub 15}Al{sub 27}Zr{sub 2} alloy and its field independence feature

In order to obtain “table-like” magnetocaloric effect (MCE), multiple-phase Gd{sub 56}Ni{sub 15}Al{sub 27}Zr{sub 2} alloy was prepared by arc-melting followed by suck-casting method. Powder x-ray diffraction and calorimetric measurements reveal that the sample contains both glassy and crystalline phases. The fraction of the glassy phase is about 62%, estimated from the heat enthalpy of the crystallization. The crystalline phases, Gd{sub 2}Al and GdNiAl further broadened the relatively wider magnetic entropy change (−ΔS{sub M}) peak of the amorphous phase, which resulted in the table-like MCE over a maximum temperature range of 52.5 K to 77.5 K. The plateau feature of the MCE was found to be nearly independent of the applied magnetic field from 3 T to 5 T. The maximum −ΔS{sub M} value of the MCE platforms is 6.0 J/kg K under applied magnetic field change of 5 T. Below 3 T, the field independence of the table-like feature disappears. The relatively large constant values of −ΔS{sub M} for the respective applied magnetic fields have promising applications in magnetic refrigeration using regenerative Ericsson cycle.
Authors:
; ; ; ;  [1] ; ;  [2] ;  [3] ;  [4]
  1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054 (China)
  2. Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011 (United States)
  3. (United States)
  4. North Electronic Device Research Institute, Beijing 100141 (China)
Publication Date:
OSTI Identifier:
22492717
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALLOYS; AMORPHOUS STATE; CALORIMETRY; CASTING; CRYSTALLIZATION; ENTHALPY; ENTROPY; ERICSSON CYCLE; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MELTING; REFRIGERATION; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; X-RAY DIFFRACTION