Large magnetization change and magnetoresistance associated with martensitic transformation in Mn2Ni1.36Sn0.32Co0.32 alloy

Z.H. Liu, Z.G. Wu, X.Q. Ma, W.H. Wang, Yinong Liu, G.H. Wu

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In this paper we report on the realization of magnetic field-induced martensitic phase transformation in Mn-rich Heusler alloy Mn2Ni1.36Sn0.32Co0.32. The saturation magnetization of the austenite reached 111 emu/g at 70 kOe, which decreased rapidly to 8 emu/g upon transforming to martensite. This is attributed to the crystallographic distortion from cubic structure to tetragonal structure with c/a > 1, turning the Mn moments at B sites and D sites from parallel alignment to antiparallel alignment. A large magnetoresistance of 40% was observed through the field-induced transformation. The increase of conduction electrons accompanying this field-induced martensitic transformation is estimated to be 67%. These intriguing properties render the alloy a good candidate for applications in smart devices. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3607311]
Original languageEnglish
Pages (from-to)013916-1 - 013916-4
JournalJournal of Applied Physics
Volume110
DOIs
Publication statusPublished - 2011

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