Open AccessThe effect of Pd on martensitic transformation and magnetic properties for Ni50Mn38−xPdxSn12Heusler alloys
Author(s) -
Chao Jing,
Dong Zheng,
Z. Li,
Linye Yu,
Y. L. Zhang,
Yan Liu,
Junkun Sun,
Chunyan Liu,
Dongmei Deng,
Wenyun Yang
Publication year - 2016
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4942953
Subject(s) - magnetic refrigeration , diffusionless transformation , materials science , shape memory alloy , martensite , crystallite , atom (system on chip) , condensed matter physics , thermodynamics , magnetic shape memory alloy , metallurgy , magnetic field , magnetization , microstructure , physics , magnetic anisotropy , quantum mechanics , computer science , embedded system
In the past decade, Mn rich Ni-Mn based alloys have attained considerable attention due to their abundant physics and potential application as multifunctional materials. In this paper, polycrystalline Ni50Mn38−xPdxSn12 (x = 0, 2, 4, 6) Heusler alloys have been prepared, and the martensitic phase transformation (MPT) together with the shape memory effect and the magnetocaloric effect has been investigated. The experimental result indicates that the MPT evidently shifts to a lower temperature with increase of Pd substitution for Mn atoms, which can be attributed to the weakness of the hybridization between the Ni atom and excess Mn on the Sn site rather than the electron concentration. The physics properties study focused on the sample of Ni50Mn34Pd4Sn12 shows a good two-way shape memory behavior, and the maximum value of strain Δ L/L reaches about 0.13% during the MPT. The small of both entropy change Δ ST and magnetostrain can be ascribed to the inconspicuous influence of magnetic field induced MPT
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