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The influence of Al substitution on the phase transitions and magnetocaloric effect in Ni43Mn46Sn11−xAlx alloys |
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| Authors: | Jie ChenZhida Han Bin Qian Ping ZhangDunhui Wang Youwei Du |
| Affiliation: | a Department of Physics, Changshu Institute of Technology, Changshu 215500, People’s Republic of China b Jiangsu Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu 215500, People’s Republic of China c Department of Physics, Nanjing University, Nanjing 210093, People’s Republic of China |
| Abstract: | The effects of Al substitution on the phase transitions and magnetocaloric effect of Ni43Mn46Sn11−xAlx (x=0-2) ferromagnetic shape memory alloys were investigated by X-ray diffraction and magnetization measurements. With the increase of Al content, the cell volume decreases due to the smaller radius of Al, and the martensitic transformation temperature increases rapidly, while the Curie temperature of austenitic phase shows a small increase. A large positive and a negative magnetic entropy change were observed near the first-order martensitic transition and the second-order magnetic transition, respectively. The magnetic entropy changes, hysteresis behavior, and refrigerant capacity near the two transitions are compared. |
| Keywords: | Ferromagnetic shape memory alloy Martensitic transformation Magnetocaloric effect |
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