Lattice Anomalies in the Oxygen Deficient NdFeAsO Superconductor

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	Lattice Anomalies in the Oxygen Deficient NdFeAsO Superconductor
	Calamiotou, M ; Margiolaki, I ; Ren, ZA ; Zhao, ZX ; Siranidi, E ; Liarokapis, E
刊名	JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
	2011
卷号	24 期号:3 页码:1181
ISSN号	1557-1939
通讯作者	Liarokapis, E: Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece.
中文摘要	We compare the results of high-resolution synchrotron X-ray powder diffraction with low-temperature spectroscopic studies on the oxygen deficient NdFeAsO(0.85) superconductor. IR results indicate that a certain mode related to vibrations of the As ions softens at low temperatures. By employing a dense temperature sampling we have managed to reveal unnoticed structural modifications that start around similar to 180 K, as the anomaly of the IR mode, and disappear at the transition temperature. The data show smaller structural changes in the Nd-O charge reservoir layer, while in the superconducting layer the FeAs(4) tetrahedron shows gradual modifications below similar to 180 K, which peak around 140 K and then suddenly disappear at T(C). The observed lattice anomalies are not connected with a structural phase transition or an AF ordering; they are more evident in the superconducting Fe-As planes, and disappear across T(C), pointing to a connection to superconductivity.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40725]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Calamiotou, M,Margiolaki, I,Ren, ZA,et al. Lattice Anomalies in the Oxygen Deficient NdFeAsO Superconductor[J]. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,2011,24(3):1181.
APA	Calamiotou, M,Margiolaki, I,Ren, ZA,Zhao, ZX,Siranidi, E,&Liarokapis, E.(2011).Lattice Anomalies in the Oxygen Deficient NdFeAsO Superconductor.JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,24(3),1181.
MLA	Calamiotou, M,et al."Lattice Anomalies in the Oxygen Deficient NdFeAsO Superconductor".JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 24.3(2011):1181.