期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 582, 期 -, 页码 369-373出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.08.053
关键词
Ferromagnetic shape memory alloy; Martensitic transition; Magnetocaloric effect; High-Mn content
This paper investigates the effects of Ge addition on the martensitic transition (MT) and magnetic properties in the Mn-rich ferromagnetic shape memory alloys of Mn2Ni1.6Sn0.4-xGex. The increase of Ge content leads to a rapid increase of the MT temperature but a gradual decrease of the Curie temperature of austenitic phase. Field-induced metamagnetic phase transition was confirmed and the MT temperatures decreased by about 7 K under the magnetic field of 30 kOe for x = 0.02. Large magnetic entropy changes were observed around MT temperatures, which would be ascribed to the temperature-and field-induced MT in Mn2Ni1.6Sn0.4-xGex alloys. The hysteresis losses and effective refrigerant capacities for these alloys were discussed in this paper. (c) 2013 Elsevier B.V. All rights reserved.
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