標題: Magnetocaloric Properties of Melt-Spun Fe-Ni-Mn-Ga Ribbons
作者: Shih, C. W.
Zhao, X. G.
Chang, H. W.
Tseng, Y. C.
Chang, W. C.
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Heusler alloy;magnetocaloric properties;melt-spun ribbon
公開日期: 1-Jan-2014
摘要: The effects of Ni substitution for Fe on phase constitutions, Curie temperature T-C, and magnetocaloric properties of melt-spun Fe50-xNixMn25Ga25 (x =0, 1, 3, 5 and 7) ribbons have been investigated. X-ray diffraction results show that the main phase in the Fe50-xNixMn25Ga25 (x = 0-7) alloy changed with the increase of Ni content from FCC structure for x = 0 into B2 structure for x = 1-7. Besides, the magnetic phase exhibits phase transition of ferromagnetic into paramagnetic state with increasing temperature for the samples with B2-type structure. The Curie temperature T-C of these ribbons varies in the temperature range of 232-257 K. The peak values of the maximal magnetic entropy change, -Delta S-M(max), are about 1.4-1.6 Jkg/K for Ni-substituted ribbons at a maximum applied field of 30 kOe. On the other hand, the relatively broader temperature range at the half maximum of Delta S-M peak (similar to 90 K), low-cost and nontoxic elements make Fe-Ni-Mn-Ga-based ribbons the promising candidates for magnetic refrigeration applications close to room temperature.
URI: http://dx.doi.org/10.1109/TMAG.2013.2276091
http://hdl.handle.net/11536/23626
ISSN: 0018-9464
DOI: 10.1109/TMAG.2013.2276091
期刊: IEEE TRANSACTIONS ON MAGNETICS
Volume: 50
Issue: 1
結束頁: 
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