Melt-extracted Gd73.5Si13B13.5/GdB6 ferromagnetic/antiferromagnetic microwires with excellent magnetocaloric properties
Journal Article
·
· Journal of Alloys and Compounds
- Univ. of South Florida, Tampa, FL (United States); VNU Univ. of Science, Hanoi (Vietnam); Univ. of Danang (Vietnam); OSTI
- Univ. of South Florida, Tampa, FL (United States); Harbin Institute of Technology (China)
- Ubon Ratchathani Univ. (Thailand)
- VNU Univ. of Science, Hanoi (Vietnam)
- Harbin Institute of Technology (China)
- Univ. of South Florida, Tampa, FL (United States)
A novel class of magnetocaloric microwires composed of antiferromagnetic GdB6 nanocrystals embedded in an amorphous ferromagnetic Gd73.5Si13B13.5 matrix is reported. These composite microwires were created directly from a melt-extraction process. XRD, TEM, HRTEM and SAED confirm the formation of GdB6 nanocrystals (~10 nm) in the amorphous Gd73.5Si13B13.5 matrix. As a second-order magnetic material, the Gd73.5Si13B13.5/GdB6 microwires exhibit an excellent magnetocaloric response, with a large magnetic entropy change ΔSM ~6.4 J kg-1 K-1 at ~120 K, a large temperature interval δTFWHM ~130 K, and the large refrigerant capacity RC ~890 J kg-1 for a field change of 5 T. Such microwires are a promising candidate for active magnetic refrigeration in the temperature range of 10–200 K.
- Research Organization:
- Univ. of South Florida, Tampa, FL (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-07ER46438
- OSTI ID:
- 1800498
- Alternate ID(s):
- OSTI ID: 1579434
- Journal Information:
- Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 818; ISSN 0925-8388
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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