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Magnetocaloric effect and critical behavior in melt-extracted Gd60Co15Al25microwires
- Source :
- physica status solidi (a). 212:1905-1910
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- High-quality Gd60Co15Al25 microwires with an average diameter of 40 µm were successfully fabricated by the melt-extraction method. The as-cast microwires undergo a second-order paramagnetic to ferromagnetic (PM–FM) transition at ∼100 K. Large values of the magnetic entropy change (−ΔSM ∼9.73 J kg−1 K−1) and the refrigerant capacity (RC ∼732 J kg−1) are achieved for a field change of 5 T. A careful analysis of critical exponents near the PM–FM transition indicates the significant effects of structural disorder on the long-range ferromagnetic interaction and the magnetocaloric response of the microwires. The excellent magnetocaloric properties make the Gd60Co15Al25 microwires very promising for use in magnetic refrigerators operating in the liquid nitrogen temperature range.
- Subjects :
- Materials science
Condensed matter physics
Average diameter
Surfaces and Interfaces
Liquid nitrogen
Condensed Matter Physics
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Refrigerant
Paramagnetism
Ferromagnetism
Materials Chemistry
Magnetic refrigeration
Electrical and Electronic Engineering
Science, technology and society
Critical exponent
Subjects
Details
- ISSN :
- 18626300
- Volume :
- 212
- Database :
- OpenAIRE
- Journal :
- physica status solidi (a)
- Accession number :
- edsair.doi...........ecd947625f6e6a7fada4910e5f7f593d