首页|Giant low-field cryogenic magnetocaloric effect in poly crystalline LiErF4 compound

Giant low-field cryogenic magnetocaloric effect in poly crystalline LiErF4 compound

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Antiferromagnetic LiErF4 has attracted extensive attention due to its dipolar interaction domination and quantum fluctuations action.In the present work,the crystal structure,cryogenic magnetic properties,and magnetocaloric effect(MCE)of polycrystalline LiErF4 compound are investigated.Crystallographic study shows that the compound crystallizes in the tetragonal scheelite structure with I41/a space group.It exhibits an antiferromagnetic(AFM)phase transition around 0.4 K,accompanied by a giant cryogenic MCE.At 1.3 K,the maximum values of magnetic entropy changes are 24.3 J/kg·K,33.1 J/kg·K,and 49.0 J/kg·K under the low magnetic field change of 0-0.6 T,0-1 T,and 0-2 T,respectively.The giant MCE observed above Neel temperature TN is probably due to the strong quantum fluctuations,which cause a large ratio of the unreleased magnetic entropy existing above the phase transition temperature.The outstanding low-field MCE below 2 K makes the LiErF4 compound an attractive candidate for the magnetic refrigeration at the ultra-low temperature.

LiErF4magnetocaloric effectultra-low temperature

Zhaojun Mo、Jianjian Gong、Huicai Xie、Lei Zhang、Qi Fu、Xinqiang Gao、Zhenxing Li、Jun Shen

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Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,China

School of Rare Earths,University of Science and Technology of China,Hefei 230026,China

Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China

National Science Fund for Distinguished Young Scholars of ChinaNational Natural Science Foundation of ChinaKey Research Program of the Chinese Academy of SciencesBasic Frontier Scientific Research Program of Chinese Academy of Sciences From 0 to 1 Original Innovation ProjectScientific Instrument Developing Project of Chinese Academy of Sciences

5192560552171195ZDRW-CN-2021-3ZDBS-LY-JSC017YJKYYQ20200042

2023

10.1088/1674-1056/ac65ef

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDCSCD北大核心EI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2023.32(2)
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