Crystal structure, magnetic property and cryogenic magnetocaloric effect of Gd4Al2O9 aluminate

被引：7

作者：

Zhang, Zhenqian ^{[1
]}

Na, Yingzhe ^{[1
]}

Lin, Junli ^{[1
]}

Ye, Xinyue ^{[1
]}

机构：

[1] Hangzhou Dianzi Univ, Inst Adv Magnet Mat, Key Lab Novel Mat Sensor Zhejiang Prov, Hangzhou 310012, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2024年 / 610卷

基金：

中国国家自然科学基金;

关键词：

Magnetocaloric effect (MCE); Rare earth-based compound; Magnetic refrigeration; Magnetic property; RE; HO; HEAT; GD; DY;

D O I：

10.1016/j.jmmm.2024.172532

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Developing magnetic materials with excellent magnetocaloric effect (MCE) is a vital prerequisite for practical magnetic refrigeration (MR) applications. Herein, a single-phased polycrystalline Gd4Al2O9 compound was fabricated using the co-precipitation method, and its structure, magnetic property together with magnetocaloric performance were investigated. The Gd4Al2O9 compound was found to crystallize in the monoclinic structure space group P2(1)/c with lattice parameters a = 7.4852 & Aring;, b = 10.5561 & Aring;, c = 11.1774 & Aring;, beta = 108.95 degrees and V=835.3107 & Aring;(3), and the constituent elementals had valence states of Gd3+, Al3+ and O2-. Excellent comprehensive MCE performance was observed for the Gd4Al2O9 compound in low-temperature regions. The obtained values of maximal magnetic entropy change, temperature-averaged entropy change (3 K) and relative cooling power under the magnetic flux density change of 0-7 T are 26.31 J/kg<middle dot>K, 25.09 J/kg<middle dot>K and 317.05 J/kg. The Gd4Al2O9 compound shows impressive comprehensive MCE performances compared with some recently reported rare earth-based MR materials with prominent performances, meaning that it is a suitable candidate material for low-temperature MR applications.

引用

页数：7

共 51 条

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