Quantitative Model of Large Magnetostrain Effect in Ferromagnetic Shape Memory Alloys

Details Quantitative Model of Large Magnetostrain Effect in Ferromagnetic Shape Memory Alloys Quantitative Model of Large Magnetostrain Effect in Ferromagnetic Shape Memory Alloys

1999-06-29

arxiv.org/abs/cond-mat/9906433v1

Physics

Condensed Matter

Materials Science

7 pages, 4 Postscript figures, submitted to EPJ

Scientific paper

10.1007/s100510050128

A quantitative model describing large magnetostrain effect observed in several ferromagnetic shape memory alloys such as Ni2MnGa is briefly reported.The paper contains an exact thermodynamic consideration of the mechanical and magnetic properties for a similar type materials. As a result, the basic mechanical state equation including magnetic field effect is directly derived from a general Poisson's rule. It is shown that the magnetic field induced deformation effect is directly connected with the strain dependence of magnetization. A simple model of magnetization and its dependence on the strain is considered and applied to explain the results of experimental study of large magnetostrain effects in Ni2MnGa.

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