Supported by the National Natural Science Foundation of China under Grant No 50271002, and the New Century Programme for Excellent Talents of the Ministry of Education of China under Grant No 04-0165.
Giant magnetic field induced strain (MFIS) up to 6.2% is achieved in the Ni50Mn27.5Ga22.5 single crystals with 5 M martensitic structure at room temperature. The switching magnetic field was about 2.4 kOe for the ma...