Physics – Condensed Matter – Materials Science
Scientific paper
2011-03-09
IEEE Transactions on Magnetics, 2011, 47(10): 4041-4043
Physics
Condensed Matter
Materials Science
3 pages and 4 figures
Scientific paper
10.1109/TMAG.2011.2159964
The martensitic and magnetic phase transformations in MnNiGe1-xSnx (0 \leq x \leq 0.200) alloys were investigated using X-ray diffraction (XRD), differential thermal analysis (DTA) and magnetization measurements. Results indicate that the increasing Sn substitution in MnNiGe1-xSnx results in (i) decrease of martensitic transformation temperature from 460 to 100 K and (ii) conversion of AFM spiral to antiparallel AFM strcuture in martensite. Based on these, the remarkable magnetic-field-induced PM/spiral-AFM and FM/AFM magnetostructural transformations and, large positive and negative magnetocaloric effects are obtained. The magnetoresponsive effects of MnNiGe1-xSnx alloys are enhanced by Sn substitution. A structural and magnetic phase diagram of MnNiGe1-xSnx alloys has been proposed.
Chen Jinglan
Du Yin
Liu Enke
Wang Wenhong
Wu Guangheng
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