首页|Large low-field reversible magnetocaloric effect in K3Gd(PO4)2 at sub-Kelvin temperature

Large low-field reversible magnetocaloric effect in K3Gd(PO4)2 at sub-Kelvin temperature

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We synthesized a potassium gadolinium phosphate K3Gd(PO4)2 with monoclinic structure(P21/m)by the high-temperature solid-state reaction method.Its lattice constants obtained by Rietveld refinements of XRD curve are a=0.7411 nm,b=0.5624 nm,and c=0.9433 nm.Magnetic and magnetocaloric properties of K3Gd(PO4)2 were investigated in detail.The magnetic phase transition temperature of K3Gd(PO4)2 was determined by ultra-low temperature testing to be 0.58 K.K3Gd(PO4)2 exhibits large magnetic entropy changes(-△SM).The maximum-△SM are 20.2 and 29.4 J/(kg·K)in the magnetic field variation(△H)of 1 and 2 T,respectively,which are larger than that of the commercial Gd3Ga5O12(GGG).The maximum adiabatic temperature change(△Tad)reaches 5.91 K under a magnetic field change(△H)of 1 T.K3Gd(PO4)2 is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

Ultra-low temperatureMagnetocaloric effectMagnetic entropy changeMagnetic refrigerationRare earths

Haojie Wang、Zhaojun Mo、Jianjian Gong、Heng Tu、Guochun Zhang、Jun Shen

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

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

Center for Crystal Research and Development,Key Laboratory of Functional Crystals and Laser Technology,Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China

Department of Energy and Power Engineering,School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081,China

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国家重点研发计划National Science Foundation for Excellent Young ScholarsNational Science Foundation for Distinguished Young Scholars国家自然科学基金

2022YFB3505102522221075192560552171195

2024

10.1016/j.jre.2023.04.013

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(6)
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