Magnetic field-induced reverse martensitic transformation in NiMnGaCu alloy

The reverse martensitic transformation was monitored by testing the x-ray diffraction patterns with increasing temperatures in an Ni₄₆Mn ₃₃Ga₁₇Cu₄ alloy. A large magnetization change from a weak-magnetic martensite phase to a ferromagnetic austenite phase has been found on the M-T curves of heating cycle in this alloy. The reverse martensitic transformation temperatures have been lowered by 7 K under the magnetic field of 90 kOe. The magnetic field-induced reverse martensitic transformation has been confirmed at a fixed temperature in this alloy, demonstrating that another alloy performing the MFIRMT is discovered: NiMnGaCu alloy.