中国物理B ›› 2021, Vol. 30 ›› Issue (7): 77501-077501.doi: 10.1088/1674-1056/abf916
Magnetism and giant magnetocaloric effect in rare-earth-based compounds R3BWO9 (R = Gd, Dy, Ho)
Lu-Ling Li(李炉领)1, Xiao-Yu Yue(岳小宇)1,†, Wen-Jing Zhang(张文静)1, Hu Bao(鲍虎)3, Dan-Dan Wu(吴丹丹)1, Hui Liang(梁慧)1, Yi-Yan Wang(王义炎)1, Yan Sun(孙燕)1, Qiu-Ju Li(李秋菊)3, and Xue-Feng Sun(孙学峰)2,1,‡
- 1 Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
2 Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, and Key Laboratory of Strongly-Coupled Quantum Matter Physics(CAS), University of Science and Technology of China, Hefei 230026, China;
3 School of Physics & Material Science, Anhui University, Hefei 230039, China
Magnetism and giant magnetocaloric effect in rare-earth-based compounds R3BWO9 (R = Gd, Dy, Ho)
Lu-Ling Li(李炉领)1, Xiao-Yu Yue(岳小宇)1,†, Wen-Jing Zhang(张文静)1, Hu Bao(鲍虎)3, Dan-Dan Wu(吴丹丹)1, Hui Liang(梁慧)1, Yi-Yan Wang(王义炎)1, Yan Sun(孙燕)1, Qiu-Ju Li(李秋菊)3, and Xue-Feng Sun(孙学峰)2,1,‡
- 1 Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
2 Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, and Key Laboratory of Strongly-Coupled Quantum Matter Physics(CAS), University of Science and Technology of China, Hefei 230026, China;
3 School of Physics & Material Science, Anhui University, Hefei 230039, China
摘要： The magnetism and magnetocaloric effect (MCE) of rare-earth-based tungstate compounds $R_{3}$BWO$_{9 }$ ($R = {\rm Gd}$, Dy, Ho) have been studied by magnetic susceptibility, isothermal magnetization, and specific heat measurements. No obvious long-range magnetic ordering can be found down to 2 K. The Curie-Weiss fitting and magnetic susceptibilities under different applied fields reveal the existence of weak short-range antiferromagnetic couplings at low temperature in these systems. The calculations of isothermal magnetization exhibit a giant MCE with the maximum changes of magnetic entropy being 54.80 J/kg$\cdot$K at 2 K for Gd$_{3}$BWO$_{9}$, 28.5 J/kg$\cdot$K at 6 K for Dy$_{3}$BWO$_{9}$, and 29.76 J/kg$\cdot$K at 4 K for Ho$_{3}$BWO$_{9}$, respectively, under a field change of 0-7 T. Especially for Gd$_{3}$BWO$_{9}$, the maximum value of magnetic entropy change ($-\Delta S_{M}^{\max}$) and adiabatic temperature change ($ - \Delta T_{\rm ad}^{\max}$) are 36.75 J/kg$\cdot$K and 5.56 K for a low field change of 0-3 T, indicating a promising application for low temperature magnetic refrigeration.
中图分类号: (Magnetocaloric effect, magnetic cooling)
- 75.30.Sg