Low-pressure-induced large barocaloric effect in MnAs_(0.94)Sb_(0.06) alloy around room temperature  

作　　者：Peng-Tao Cheng Zhao Zhang Xu-Cai Kan Cheng-Liang Zhang Zheng-Ming Zhang Bing Li Dun-Hui Wang 

机构地区：[1]Division of Microelectronic Materials and Devices,Hangzhou Dianzi University,Hangzhou 310018,China [2]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China [3]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [4]School of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China [5]School of Materials Science and Engineering,Anhui University,Hefei 230601,China [6]Engineering Technology Research Center of Magnetic Materials,School of Physics and Materials Science,Anhui University,Hefei 230601,China

出　　处：《Rare Metals》2023年第12期3977-3984,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.U22A20117);the National Natural Science Foundation of China (No.52271175)。

摘　　要：The barocaloric effect(BCE)is a promising alternative to traditional vapor compressing refrigeration because of its environmentally friendly impact and high energy efficiency.However,the driving hydrostatic pressure for most BCE materials is relatively high,which is not conducive to practical application.In this paper,we report that the large barocaloric entropy change of MnAs_(0.94)Sb_(0.06)alloy can be induced by low hydrostatic pressures.Its phase transition temperature is strongly sensitive to the applied pressure,resulting in a large barocaloric coefficient of 134 K·GPa^(-1)on cooling and 126 K·GPa^(-1)on heating.The maximum barocaloric entropy change and adiabatic temperaturechange resulted from hydrostatic pressure of 40 MPa reach up to 26.3 J·kg^(-1)·K^(-1)and 14.4 K,respectively,showing an excellent barocaloric performance.The results demonstrate that the MnAs_(0.94)Sb_(0.06)alloy is a promising alternative for BCE refrigeration.

关 键 词：ALLOY HYDROSTATIC 

分 类 号：TG132[一般工业技术—材料科学与工程]