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- Title
Effect of Ni/Sn ratio on martensitic transformation and magnetic properties in high-Mn content Mn<sub>2</sub>Ni<sub>1.64− x</sub>Sn<sub>0.36+ x</sub> ferromagnetic shape memory alloys.
- Authors
Xuan, H. C.; Zhang, Y. Q.; Li, H.; Han, P. D.; Wang, D. H.; Du, Y. W.
- Abstract
The effect of variation in Ni/Sn ratio on martensitic transformation (MT) and magnetic properties was investigated in high-Mn content Mn2Ni1.64− xSn0.36+ x alloys. With the increase of Sn content, the MT temperature shifts substantially towards lower temperature, while the Curie temperature of austenite remains almost unchanged. The reverse MT temperature decreases from 268 to around 80 K for Mn2Ni1.64− xSn0.36+ x alloys as x increases from 0.02 to 0.08. Under the low field of 1.2 T, the peak values of magnetic entropy changes are 9.8 J/kg K, 10.1 J/kg K, 10.3 J/kg K, and 6.1 J/kg K for x = 0.02, 0.04, 0.06, and 0.08, respectively. The abrupt changes in magnetization around MT temperatures and the field-induced metamagnetism should account for the large magnetic entropy changes. Incorporating the advantages of inexpensive and non-toxic raw materials, these high-Mn content alloys exhibit very promising prospects for the applications in magnetic refrigeration.
- Subjects
MARTENSITIC transformations; MAGNETIC properties; METAMAGNETISM; MAGNETISM; MATERIALS science
- Publication
Physica Status Solidi. A: Applications & Materials Science, 2015, Vol 212, Issue 3, p680
- ISSN
1862-6300
- Publication type
Article
- DOI
10.1002/pssa.201431507