摘要
We investigate the influence of Sb-doping on the martensitic transformation and magnetocaloric effect in Mn（50）Ni（40）Sn（10-x）Sbx（x = 1, 2, 3, and 4） alloys. All the prepared samples exhibit a B2-type structure with the space group F m3 m at room temperature. The substitution of Sb increases the valence electron concentration and decreases the unit cell volume. As a result, the magnetostructural transformation shifts rapidly towards higher temperatures as x increases.The changes in magnetic entropy under different magnetic field variations are explored around this transformation. The isothermal magnetization curves exhibit typical metamagnetic behavior, indicating that the magnetostructural transformation can be induced by a magnetic field. The tunable martensitic transformation and magnetic entropy changes suggest that Mn（50）Ni（40）Sn（10-x）Sbx alloys are attractive candidates for applications in solid-state refrigeration.
We investigate the influence of Sb-doping on the martensitic transformation and magnetocaloric effect in Mn（50）Ni（40）Sn（10-x）Sbx（x = 1, 2, 3, and 4） alloys. All the prepared samples exhibit a B2-type structure with the space group F m3 m at room temperature. The substitution of Sb increases the valence electron concentration and decreases the unit cell volume. As a result, the magnetostructural transformation shifts rapidly towards higher temperatures as x increases.The changes in magnetic entropy under different magnetic field variations are explored around this transformation. The isothermal magnetization curves exhibit typical metamagnetic behavior, indicating that the magnetostructural transformation can be induced by a magnetic field. The tunable martensitic transformation and magnetic entropy changes suggest that Mn（50）Ni（40）Sn（10-x）Sbx alloys are attractive candidates for applications in solid-state refrigeration.
作者
Ishfaq Ahmad Shah
Najam ul Hassan
刘俊
龚元元
徐桂舟
徐锋
Ishfaq Ahmad Shah Najam ul Hassan Jun Liu Yuanyuan Gong Guizhou Xu Feng Xu(Jiangsu Key Laboratory of Advanced Micro ＆ Nano Materials and Technology, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.51271093,51571121,11604148,and 51601092)
the Fundamental Research Funds for the Central Universities,China(Grant Nos.30920140111010,30916011344,and 30916011345)
Jiangsu Natural Science Foundation for Distinguished Young Scholars,China(Grant No.BK20140035)
China Postdoctoral Science Foundation(Grant No.2016M591851)
the Natural Science Foundation of Jiangsu Province,China(Grant Nos.BK20160833 and BK20160829)
Qing Lan Project,Six Talent Peaks Project in Jiangsu Province,China
the Priority Academic Program Development of Jiangsu Higher Education Institutions,China
