Theoretical description of the phase transitions in Ni-Mn-Ga shape memory alloys under an external stress along  axis
|Sergey V. Taskaev , Vasiliy D. Buchelnikov , Nikolay M. Didenko|
Chelyabinsk State University (ChelSU), Br. Kashirinykh Str, 129, Chelyabinsk 454021, Russian Federation
Cubic Heusler Ni-Mn-Ga shape memory alloys are of special attention, because of their structural and magnetic properties. In this kind of Heusler alloys martensitic phase transitions happen in the ferromagnetic state.
Here T is the dimensionless temperature, ξ, B is the dimensionless magnetostriction constants, K is the dimensionless magnetic anisotropy constant, σ is the dimensionless stress, е2 and е3 are the combinations of the strain tensor, θ and φ are the polar and azimuthal angles of magnetization. In this work we consider the case of B>0 and K>0.
Presentation: Oral at E-MRS Fall Meeting 2007, Symposium E, by Sergey V. Taskaev
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-11 10:51 Revised: 2009-06-07 00:44