Brilliant cryogenic magnetic refrigerant with excellent magnetocaloric effect and refrigeration performances  

作　　者：Zhao-Jun Mo Hui-Cai Xie Yan Li Jia-Xin Jiang Zhen-Xing Li Xin-Qiang Gao Feng-Xia Hu Jun Shen Bao-Gen Shen 

机构地区：[1]Key Laboratory of Rare Earths,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,China [2]Jiangxi University of Science and Technology,Ganzhou 341000,China [3]School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China [4]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Journal of Advanced Ceramics》2024年第12期1996-2003,共8页先进陶瓷(英文)

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFB3501204);the National Science Foundation for Excellent Young Scholars(Grant No.52222107);the National Natural Science Foundation of China(Grant No.52171195).

摘　　要：There is an urgent demand for the development of new resource-saving and high-efficiency cryogenic refrigeration technologies against the historical backdrop of increasing scarcity of resources and energy.Magnetic refrigeration technology based on the magnetocaloric effect(MCE)of magnetic materials is a promising approach to address helium resource constraints and improve energy efficiency.Here,a brilliant cryogenic magnetic refrigerant with a large low-field MCE and excellent refrigeration performance is presented.Benefiting from the enhanced ferromagnetism and low saturation magnetic field,the peaks of magnetic entropy change,refrigeration capacity,and adiabatic temperature change of Eu(Ti,Nb,Zr)O_(3) compounds reach 19.6 J·kg^(−1)·K^(−1),87.6 J·kg^(−1),and 5.5 K,respectively,for a field change of 0−1 T.Magnetic refrigeration experiments on a Gifford‒McMahon(GM)/magnetic hybrid refrigerator further demonstrated that EuTi_(0.8375)Nb_(0.0625)Zr_(0.1)O_(3) is an excellent magnetic refrigerant operating near the liquid helium temperature.An appropriate amount of this magnetic refrigerant can significantly improve the refrigeration performance of the hybrid refrigerator.The cooling power in hybrid refrigeration mode is improved by a maximum of 52%over that in pure GM/HoCu_(2) mode at 4.2 K and 0.5 Hz.In addition,the cooling efficiency at 4.2 K is more than 40%greater than that of the pure GM/HoCu_(2) refrigerator.

关 键 词：magnetic refrigerant magnetocaloric effect(MCE) cryogenic refrigeration Gifford‒McMahon(GM)/magnetic hybrid refrigerator 

分 类 号：TB6[一般工业技术—制冷工程]