Magnetic Field-Induced Strain of Ni–Co–Mn–In Alloy in Pulsed Magnetic Field

The experimental investigations of a magnetic field-induced strain has been carried out in the Heusler alloy Ni 45 Co 5 Mn 36.7 In 13.3 by a capacitance method in a single-shot pulse magnetic field with a frequency of 200 Hz. A 3% deformation has been observed on the application of a maximum pulse field of 70 kOe at 300 K. This indicates an almost complete recovery of the original shape of the alloy. Magnetization shows a clear metamagnetic transition and a large hysteresis at around 300 K, indicating a magnetic field-induced transition from an antiferromagnetic or paramagnetic martensitic state to a ferromagnetic parent phase.