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Phase stability and magnetic-field-induced martensitic transformation in Mn-rich NiMnSn alloys

Author(s): Q. Tao | Z. D. Han | J. J. Wang | B. Qian | P. Zhang | X. F. Jiang | D. H. Wang | Y. W. Du

Journal: AIP Advances
ISSN 2158-3226

Volume: 2;
Issue: 4;
Start page: 042181;
Date: 2012;
Original page

A series of Ni50-xMn41+xSn9 (x = 0–19) alloys from Ni-rich to Mn-rich composition were prepared, and the composition dependence of phase transitions and magnetic properties were investigated. No γ-phase can be observed until x = 17. Martensitic transformation from ferromagnetic austenite to weak-magnetic or ferromagnetic martensite was observed in alloys with Mn content between 52 and 58, and magnetic-field-induced transformation was confirmed. A large magnetization change of 44 Am2/kg across the martensitic transformation is observed in Ni37Mn54Sn9. Our results indicate that Mn-rich Ni-Mn-Sn alloys show promise as metamagnetic shape memory alloys.
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