New type of magnetocaloric effect: Implications on low-temperature magnetic refrigeration using an Ericsson cycle
- Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020 (United States)
The low-temperature, high magnetic field heat capacity (1.5 to 70 K and 0 to 9.85 T), dc and ac magnetic behaviors of the compound (Gd[sub 0.54]Er[sub 0.46])AlNi show that field-induced magnetic entropy change is significant and almost constant over the temperature region of [similar to]15 to [similar to]45 K. The resulting temperature dependence of the magnetocaloric effect, nearly constant over a 30+ K temperature range, is unprecedented (most magnetic materials have a caretlike shape temperature dependence). These data show that (Gd[sub 0.54]Er[sub 0.46])AlNi can be used as an effective active magnetic regenerator material for an Ericsson-cycle magnetic refrigerator, and could substitute for complex composite layered materials suggested earlier.
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 7274371
- Journal Information:
- Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 64:20; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
661210 -- Cryogenics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
ENTROPY
ERBIUM ALLOYS
FLUIDS
GADOLINIUM ALLOYS
MAGNETIC FIELDS
MAGNETIC REFRIGERATORS
MAGNETO-THERMAL EFFECTS
NICKEL ALLOYS
PHYSICAL PROPERTIES
QUATERNARY ALLOY SYSTEMS
RARE EARTH ALLOYS
REFRIGERANTS
REFRIGERATORS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
THERMODYNAMIC PROPERTIES
WORKING FLUIDS