Tingwei Wan , Haojie Wang , Zuhua Chen , Yunhui Wang , Heng Tu , Zhenxing Li , Yanan Zhao , Jun Shen , Zhaojun Mo , Guochun Zhang
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引用次数: 0
Abstract
The gadolinium-rich phosphates, Gd8P2O17 and Gd3PO7, were successfully synthesized by the high-temperature solid-phase reaction method. Gd8P2O17 and Gd3PO7 crystallize in the monoclinic system. Their magnetic and magnetocaloric properties were systematically investigated by measuring magnetic susceptibility (χ) and magnetization (M). The phase transition temperatures for Gd3PO7 and Gd8P2O17 were observed to be below 2 K. The max magnetic entropy change () of Gd8P2O17 reaches 21.7 J·kg−1 K−1 at 2 K and 5 T, which is comparable to that of the commercial Gd3Ga5O12 under the same conditions. Gd3PO7 exhibits a of 10.3 J·kg−1 K−1 at 6 K and 5 T, similar to the value of LiDyP4O12 under the same conditions. Moreover, the relative cooling capacity (RCP) and refrigeration capacity (RC) values reach 165.05 and 123.94 J/kg for Gd3PO7 and 152.14 and 108.99 J/kg for Gd8P2O17 under the magnetic field changes of 5 T. These results indicate that Gd8P2O17 and Gd3PO7 may be promising candidates for ultra-low temperature magnetic refrigeration applications.
期刊介绍:
Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are:
- Applications of superconductivity: magnets, electronics, devices
- Superconductors and their properties
- Properties of materials: metals, alloys, composites, polymers, insulations
- New applications of cryogenic technology to processes, devices, machinery
- Refrigeration and liquefaction technology
- Thermodynamics
- Fluid properties and fluid mechanics
- Heat transfer
- Thermometry and measurement science
- Cryogenics in medicine
- Cryoelectronics