Characteriziation of $Ni_2MnGa$ Ferromagnetic Shape Memory Alloy nanowires*

Heusler type $Ni_2MnGa$ ferromagnetic shape memory alloy has been extensively studied in thin films and in bulk. The structural transition to martinsitic phase occurs thermodynamically reversibly within the ferromagnetic region.. For the technological application, magnetic field is used to induce the motion of twin boundaries in martinsite phase. $Ni_2MnGa$ nanowires were grown for the first time using electrospinning method. Structrual characterization were done using XRD and EDX. Nanowires exhibit tetragonal structure with a = b = 5.85 \AA and c/a = 0.96. Magnetic measurements show the pre- martinsite transformation. Curie temperature of nanowires is about 360 K.