Phase evolution and magnetocaloric effect of melt-spun Mn{sub 3}Sn{sub 2-xM{sub x}} (M = B, C; x = 0-0.5) ribbons
- Department of Physics, National Chung Cheng University, Ming Hsiung, Chia-Yi 62102, Taiwan (China)
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, and International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016 (China)
The effects of B and C substitution for Sn on phase components, Curie temperature T{sub C}, and magnetocaloric effect of melt-spun Mn{sub 3}Sn{sub 2-x}M{sub x} (M B, C; x = 0-0.5) ribbons have been investigated. X-ray diffraction (XRD) results show that the main phase in the as-spun Mn{sub 3}Sn{sub 2-xM{sub x}} (M = B, C; x 0-0.5) ribbons is Mn{sub 3}Sn{sub 2} of Ni{sub 3}Sn{sub 2}-type (Pnma). Minor Mn{sub 2}B (when x {>=} 0.1) or Mn{sub 5}C{sub 2} (when x > 0.1) secondary phase is formed, and their amounts increase with increasing B and C concentration, respectively. The Curie temperature T{sub C} of these ribbons varies in the temperature range of 240-250 K. The peak values of the maximal magnetic entropy change, -{Delta}S{sub M}{sup max}, are about 13.6-18.3 mJ/cm{sup 3} K for B-substituted ribbons and 13.6-17.5 mJ/cm{sup 3} K for C-substituted ribbons, respectively, at a maximum applied field of 50 kOe. These values are about one fifth that of Gd (81.4 mJ/cm{sup 3} K). However, the relatively broader temperature range of the half maximum of {Delta}S{sub M} peak ({approx}100 K), low-cost and nontoxic elements still make Mn{sub 3}Sn{sub 2}-based ribbons the promising candidates for magnetic refrigeration applications close to room temperature.
- OSTI ID:
- 22036850
- Journal Information:
- Journal of Applied Physics, Vol. 111, Issue 7; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
CONCENTRATION RATIO
CURIE POINT
ENTROPY
INTERMETALLIC COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE
MANGANESE BORIDES
MANGANESE CARBIDES
ORTHORHOMBIC LATTICES
TEMPERATURE RANGE 0273-0400 K
TIN
X-RAY DIFFRACTION