A single-crystal samples of near-stoichiometric Ni 2 MnGa alloys with large magnetic field induced strain (MSM effect) at room temperature have been investigated.It was found that there is a reversible reorientation of easy magnetization direction and magnetic domain structure under applied magnetic field.By means of x-ray Laue diffraction method and difractometric analysis it was ascertained that these phenomena are connected with the growth of martensitic twin variant with the short crystallographic axis (c-axis) directed along the applied magnetic field.Furthermore, by means magneto-optical investigations we have found the correlation between martensitic microstructure and magnetic domain structure.The field-induced reorientation of martensite was able to change the dimensional lengths of the samples more than 4.5 %.
No takes yet. Share an insight, caveat, or question.
Sozinov et al. (2001) studied this question.