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Training of the Ni-Mn-Fe-Ga ferromagnetic shape-memory alloys by cycling in a high magnetic field

A. A. Cherechukin·V. V. Khovailo·R. V. Koposov·E. P. Krasnoperov·T. Takagi·J. Tani
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Abstract

The temperature and magnetic field dependencies of Ni-Mn-Ga polycrystals deformation are investigated. Ingots were prepared by arc-melting in argon atmosphere and further annealing. A training procedure (cycling across the martensitic transition point) for the two-way shape-memory effect was performed with Ni$_{2.16}$Fe$_{0.04}$Mn$_{0.80}$Ga samples. Changes in sample deformations were noticed with changing the magnetic field at a constant temperature. The first cycle deformation increment as compared with the initial value (in the austenitic state at zero field) in the course of the martensitic transition was 0.29%, and 0.41% and 0.48% for the second and third cycles, respectively.

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A. A. Cherechukin, V. V. Khovailo, R. V. Koposov, E. P. Krasnoperov, T. Takagi, J. Tani. 2003-04-18. Training of the Ni-Mn-Fe-Ga ferromagnetic shape-memory alloys by cycling in a high magnetic field. https://doi.org/10.1016/s0304-8853(02)01064-8

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