Abstract
The precise magnetic-field-induced strain (MFIS) and magnetization of the martensite metallic compound Fe3Pt in a martensitic phase were studied in a pulsed magnetic field using the capacitance method at low temperatures down to 4.2 K, which is much lower than the martensitic transformation temperature TM=85 K. After zero field cooling, a pulsed magnetic field with a maximum frequency of 160 Hz was applied parallel to the [001]p axis. A large MFIS was measured. The value of the MFIS is ΔL/L=-1.7%. When the magnetic field was decreased, the recovery of the strain was observed. In the second applied field, a strain of about 0.6% was observed. This means that MFIS occurs even in short-pulse magnetic fields. MFIS was observed below 70 K. The largest strain was observed at 20 K. These results are almost the same as the MFIS in a steady magnetic field using a superconducting magnet.
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