  The model calculations of the magnetization curves for the internally twinned
NiMnGa ferromagnetic shape memory alloy are performed at the different volume
fractions of twin variants. The method is based on the direct minimization of
our new micromagnetic free energy model of FMSMAs taking into account both the
magnetic anisotropy energy and the magnetostatic energy contributions
associated with the laminated twin microstructure. The effect of the
magnetostatic energy is discussed in comparison with some early models, where
the magnetostatic energy was completely ignored.
