A free energy model for magneto-mechanically coupled NiMnGa single crystals P. Morrison, S. Seelecke, B. Krevet and M. Kohl Eur. Phys. J. Special Topics, 158 (2008) 213-220 Published online: 01 May 2008 DOI: 10.1140/epjst/e2008-00678-x