Martensitic transformation and magnetic properties in Mn49-xCuxNi41Sn10(x =0-2)

作者：Zhao, Meng-Zhe; Qiu, Hong-Mei^*; Zhu, Ze-Ya; Xu, Yun-Li; Liu, Zhu-Hong; Pan, Li-Qing

来源：RARE METALS, 2023, 42(7): 2433-2438.

DOI：10.1007/s12598-018-1117-8

• Heusler alloys
• Arc melting
• X-ray diffraction
• Magnetic properties

The crystal structure, phase transition, metamagnetic behavior and magnetic entropy change (& UDelta;S-M) of the Mn49-xCuxNi41Sn10(x = 0-2) alloys were systematically studied. The results of experiment about crystal structure confirm that Mn49-xCuxNi41Sn10 alloys have a highly ordered cubic L2(1) Heusler structure. With Cu element improving, all samples have a martensitic transformation and inverse martensitic transformation by analyzing the result of magnetic measurement. The saturation magnetization of samples decreases gradually, the martensitic transformation temperature (T-M) of as-annealed samples increases to a high-temperature area, and the Curie temperature (T-C) of samples moves to a low-temperature area with the content of Cu element increasing from x = 0 to x = 2. The positive values of magnetic entropy change (& UDelta;S-M) of all alloys were investigated near the martensitic transformation. When the applied magnetic field is 3 T, a worthwhile value of & UDelta;S-M can reach up to 32.0 J & BULL;kg(-1)& BULL;K-1 in Mn47Cu2Ni41Sn10 alloy.

• 单位
  北京科技大学