Large low-field reversible magnetocaloric effect in K_(3)Gd(PO_(4))_(2) at sub-Kelvin temperature

作     者：Haojie Wang Zhaojun Mo Jianjian Gong Heng Tu Guochun Zhang Jun Shen Haojie Wang;Zhaojun Mo;Jianjian Gong;Heng Tu;Guochun Zhang;Jun Shen

作者机构：School of Rare EarthsUniversity of Science and Technology of ChinaHefei230026China Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou341119China Center for Crystal Research and DevelopmentKey Laboratory of Functional Crystals and Laser TechnologyKey Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Department of Energy and PowerEngineeringSchool of Mechanical EngineeringBeijing Institute of TechnologyBeijing100081China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2024年第42卷第6期

页      面：1087-1092,I0003页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Project supported by the National Key Research and Development Program of China(2022YFB3505102) the National Science Foundation for Excellent Young Scholars(52222107) the National Science Foundation for Distinguished Young Scholars(51925605) the National Natural Science Foundation of China(52171195) 

主　　题：Ultra-low temperature Magnetocaloric effect Magnetic entropy change Magnetic refrigeration Rare earths 

摘      要：We synthesized a potassium gadolinium phosphate K3Gd(PO_(4))_(2)with monoclinic structure(P2_(1/m))by the high-temperature solid-state reaction *** lattice constants obtained by Rietveld refinements of XRD curve are a=0.7411 nm,b=0.5624 nm,and c=0.9433 *** and magnetocaloric properties of K_(3)Gd(PO_(4))_(2)were investigated in *** magnetic phase transition temperature of K3Gd(PO_(4))2 was determined by ultra-low temperature testing to be 0.58 K.K_(3)Gd(PO_(4))2 exhibits large magnetic entropy changes(-ΔSM).The maximum-ΔSM are 20.2 and 29.4 J/(kg·K)in the magnetic field variation(ΔH)of 1 and 2 T,respectively,which are larger than that of the commercial Gd_(3)Ga_(5)O_(12)(GGG).The maximum adiabatic temperature change(ΔT_(ad))reaches 5.91 K under a magnetic field change(ΔH)of 1 T.K_(3)Gd(PO_(4))_(2)is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.