期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 47, 期 10, 页码 2455-2458出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2011.2160156
关键词
Electrical properties; Heusler alloys; magnetocaloric properties; martensitic phase
The magnetocaloric and electrical properties in annealed Si-doped Ni48Mn39In13-xSix Heusler alloy ribbons with x = 0-3 have been investigated. These ribbons crystallize in a partially ordered B2 phase structure. It was observed that both the martensitic structural transition T-M and the Curie temperature T-C of austenitic phase decrease with increasing Si contents. The small amount of Si in the In position modifies the peak value of positive magnetic entropy change Delta S-M for a magnetic field change H = 50 kOe, which vary from 20.2 J . kg(-1) . K-1 for x = 0 to 23.1 J . kg(-1) . K-1 for x = 1, and then decrease to 10.1 J . kg(-1) . K-1 for x = 3. Meanwhile, the magnetoresistance associated with the martensitic transformation was found to be -45% for x = 2 at T = 192 K for a magnetic field change of 50 kOe.
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