Effect of twin microstructure changes on the magnetization behavior and magnetic forces in NiMnGa-based ferromagnetic shape memory alloys

 

Chem. Met. Alloys 6 (2013) 177-182

 

Alexander LIKHACHEV

 

The effect of twin microstructure changes on the magnetization behavior and magnetic forces in NiMnGa-based Ferromagnetic Shape Memory Alloys (FMSMAs) is discussed on the basis of the recently developed micromagnetic theory of magnetization processes in this new class of magnetostrictive materials. A comparison between theoretical results and experiments on the superelastic behavior of NiMnGa in an external magnetic field is also made.

 

 

Multiple twin and internal magnetic domain microstructure observed in a 5M NiMnGa martensite ferromagnetic shape memory alloy

 

Keywords

Magnetic shape memory / Magnetism / Twinning / Magnetic free energy / Magnetic driving force / Superelastic behavior