科研之友
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摘要
The Ni50Mn37Sb13 ribbons were prepared by melt-spinning technique to overcome the brittleness of bulk. A single phase austenite with L2(1) structure was confirmed in the as-spun and annealed ribbons at room temperature similar to bulk. We observe increments in the martensite transformation temperature (T-M) from 238 K to 252 K and in Curie temperature of austenite phase (T-C(A)) from 336 K to 342 K after annealing the as-spun ribbon. The exchange bias, magnetic entropy change (Delta S-M), and magnetoresistance are found to increase from 380 Oe to 415 Oe, 1 J/kg-K to 3 J/kg-K (Delta H = 50 kOe), and -4% to -13% (Delta H = 50 kOe), respectively, after annealing the as-spun ribbon. The possible reasons for observed behaviour are discussed.
- 出版日期2013-9-28
