A phenomenological theory of giant magnetoelastic response in martensite

Abstract

The interrelation between the giant magnetoelastic response and the superelastic or/and rubber-like behavior of a martensitic alloy is substantiated. The equivalence principle for the mechanical and magnetoelastic stresses is formulated and then used for the quantitative theoretical description of the field-induced deformation of martensite. Two different orientations of the magnetic field with respect to the crystal axes are considered. The agreement between the theoretical and experimental field dependencies of the deformation is achieved.