The effect of Pd on martensitic transformation and magnetic properties for Ni50Mn38−xPdxSn12Heusler alloys
C. Jing,
D. Zheng,
Z. Li,
L. J. Yu,
Y. L. Zhang,
Y. Liu,
J. K. Sun,
C. Q. Liu,
D. M. Deng,
W. T. Yang
Affiliations
C. Jing
Department of Physics, Shanghai University, Shanghai 200444, China
D. Zheng
Department of Physics, Shanghai University, Shanghai 200444, China
Z. Li
College of Physics and Electronic Engineering, Key Laboratory for Advanced Functional and Low Dimensional Materials of Yunnan Higher Education Institutes, Qujing Normal University, Qujing 655011, China
L. J. Yu
Department of Physics, Shanghai University, Shanghai 200444, China
Y. L. Zhang
Department of Physics, Shanghai University, Shanghai 200444, China
Y. Liu
Department of Physics, Shanghai University, Shanghai 200444, China
J. K. Sun
Department of Physics, Shanghai University, Shanghai 200444, China
C. Q. Liu
Department of Physics, Shanghai University, Shanghai 200444, China
D. M. Deng
Department of Physics, Shanghai University, Shanghai 200444, China
W. T. Yang
Shanghai Key Laboratory of High Temperature Superconductors, Shanghai 200444, China
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.
