High‐Performance Magnetic Refrigerant Featuring One‐Dimensional Gd‐O Chains and O‐Gd3 Triangles,Chemistry - An Asian Journal

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High‐Performance Magnetic Refrigerant Featuring One‐Dimensional Gd‐O Chains and O‐Gd3 Triangles
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2018-09-03 , DOI: 10.1002/asia.201801127
Ce Tao _{1,

2} , Rukang Li _{1,

2}

Affiliation

Magnetic cooling at low temperature has attracted intensive interest in cryogenics research, which may become important as cooling medium for long‐wave photon detectors to support space exploration. Here, we report a Gd‐based quaternary magnetic refrigerant material, Gd₅BSi₂O₁₃, containing chains of face‐shared GdO₉ polyhedra and geometrically frustrated OGd₃ triangles. Magnetic measurements indicate that Gd₅BSi₂O₁₃ exhibits a large magnetocaloric effect (MCE) about 1.74 times that of the practical magnetic refrigerant GGG (−ΔS_m=67.0 J kg⁻¹ K⁻¹). We analyzed the origin of the large MCE by comparing Gd^III‐containing compounds with different structures and concentrations of Gd^III.

中文翻译：

具有一维Gd-O链和O-Gd3三角形的高性能磁性制冷剂

低温下的磁冷却引起了低温研究的浓厚兴趣，这可能成为长波光子探测器支持太空探索的冷却介质的重要性。在这里，我们报告了一种基于Gd的四元磁性制冷剂材料Gd ₅ BSi ₂ O ₁₃，其中包含面共享的GdO ₉多面体链和几何受挫的OGd ₃三角形链。磁性测量表明，钆₅生物硅_2所ö ₁₃呈现有关的实际磁制冷剂GGG的1.74倍大磁热效应（MCE）（-Δ小号_米= 67.0Ĵ千克^-1 ķ ^-1）。通过比较具有不同结构和浓度的Gd ^III的含Gd ^III的化合物，我们分析了大型MCE的起源。

更新日期：2018-09-03

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