摘要
Rare-earth(R)-based materials with large reversible magnetocaloric effect(MCE)are attracting much attention as the promising candidates for low temperature magnetic refrigeration.In the present work,the magnetic properties and MCE of DyNiGa compound with TiNiSi-type orthorhombic structure are studied systematically.The DyNiGa undergoes a magnetic transition from antiferromagnetic(AFM)to paramagnetic state with Néel temperature TN=17 K.Meanwhile,it does not show thermal and magnetic hysteresis,revealing the perfect thermal and magnetic reversibility.Moreover,the AFM state can be induced into a ferromagnetic state by a relatively low field,and thus leading to a large reversible MCE,e.g.,a maximum magnetic entropy change(-ΔSM)of 10 J/kg·K is obtained at 18 K under a magnetic field change of 5 T.Consequently,the large MCE without thermal or magnetic hysteresis makes the DyNiGa a competitive candidate for magnetic refrigeration of hydrogen liquefaction.
作者
Yan-Hong Ding
Fan-Zhen Meng
Li-Chen Wang
Ruo-Shui Liu
Jun Shen
丁燕红;孟凡振;王利晨;刘若水;沈俊(School of Electrical and Electronic Engineering,Tianjin Key Laboratory of Film Electronic and Communication Devices,Tianjin University of Technology,Tianjin 300384,China;Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Department of Physics,Capital Normal University,Beijing 100048,China;University of Chinese Academy of Sciences,Beijing 100049,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.51701130 and 51925605)
the Natural Science Foundation of Tianjin,China(Grant Nos.18ZXCLGX00040 and 15JCZDJC38700)
the National Key Research and Development Program of China(Grant Nos.2019YFA0704900,2019YFA0705000,2019YFA0705100,2019YFA0705200,and 2019YFA0705300).
