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文章研究了Cu替代部分Ni对铁磁性形状记忆合金Ni_(50)Mn_(36)In_(14)相变和磁性的影响规律.研究表明,在Ni_(50-x)Cu_xMn_(36)In_(14)中,随着Cu含量的增加,相变温度逐渐降低.Cu含量低于5%时,奥氏体的磁性强于马氏体的磁性,母相和马氏体相的饱和磁化强度的差值△M随着Cu含量的增加而增大.当Cu含量x=4.5时,△M迅速增加到80 emu/g,并在该材料中观察到了磁场驱动的马氏体到奥氏体的转变,显示了该材料作为磁驱动磁电阻材料的潜在应用前景.当Cu含量高于5%时,奥氏体保持铁磁状态,马氏体相由反铁磁状态变为铁磁状态,马氏体的磁性强于奥氏体的磁性,△M大大削弱,磁场驱动性质消失.
In this paper, the effect of substitution of Cu on the phase transformation and magnetic properties of Ni_ (50) Mn_ (36) In_ (14) ferromagnetic shape memory alloys was investigated. It is found that the Ni_ (50- ), The phase transformation temperature decreases gradually with the increase of Cu content.When the Cu content is less than 5%, the magnetic properties of austenite are stronger than that of martensite, the difference of saturation magnetization of the matrix phase and martensite phase The value of ΔM increases with the increase of Cu content. When Cu content x = 4.5, ΔM rapidly increases to 80 emu / g, and magnetic field-driven martensitic transformation to austenite is observed in this material , Showing the potential application of the material as a magnetically driven magnetoresistance material.When the Cu content is higher than 5%, the austenite maintains the ferromagnetic state, the martensite phase changes from the antiferromagnetic state to the ferromagnetic state, and the Markov Magnetic body stronger than the austenitic magnetic, △ M significantly weakened, the nature of the magnetic field-driven disappear.