Martensitic transformation and magnetic properties in Mn_(49-x)Cu_(x)Ni_(41)Sn_(10)(x=0-2)  

作　　者：Meng-Zhe Zhao Hong-Mei Qiu Ze-Ya Zhu Yun-Li Xu Zhu-Hong Liu Li-Qing Pan 

机构地区：[1]Department of Applied Physics,University of Science and Technology Beijing,Beijing,100083,China [2]College of Science,China Three Gorges University,Yichang,443002,China

出　　处：《Rare Metals》2023年第7期2433-2438,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51371105)。

摘　　要：The crystal structure,phase transition,metamagnetic behavior and magnetic entropy change(ΔS_(M))of the Mn_(49-x)Cu_(x)Ni_(41)Sn_(10)(x=0-2)alloys were systematically studied.The results of experiment about crystal structure confirm that Mr_(49-x)Cu_(x)Ni_(41)Sn_(10)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(ΔS_(M))of all alloys were investigated near the martensitic transformation.When the applied magnetic field is 3 T,a worthwhile value ofΔS_(M)can reach up to 32.0 J·kg^(-1)·K^(-1)in Mn_(47)Cu_(2)Ni_(41)Sn_(10)alloy.

关 键 词：Heusler alloys Arc melting X-ray diffraction Magnetic properties 

分 类 号：TG139[一般工业技术—材料科学与工程]