铁磁性Heusler型合金Ni2MnGa是近年来开发的新型磁控制功能材料,但其马氏体相变温度通常远远低于室温,不利于实际应用.本文研究了多晶Ni48Mn33Ga19合金的马氏体相变特征,发现该合金的马氏体相变温度已提高到室温以上.在室温下,分别测量了不同条件下制备的试样的磁场诱发应变,提出了增大材料磁致应变的有效方法.
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