Structural investigation of solid solution in Nd1-xBa2-xCu3Oy

被引：7

作者：

Giovannelli, F

Ferretti, M

Bardeau, JF

Hervieu, M

Monot-Laffez, I

机构：

[1] CNRS, CRISMAT Lab, UMR 6508, F-14050 Caen, France

[2] INFM, LAMIA, I-16146 Genoa, Italy

[3] Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy

[4] Univ Maine, LPEC Lab, UMR 6087, F-72085 Le Mans 09, France

[5] CEA, CNRS, LEMA, UMR 6157, F-41029 Blois, France

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2004年 / 17卷 / 01期

关键词：

D O I：

10.1088/0953-2048/17/1/002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nd1+xBa2-xCu3Oy phases have been investigated with x = 0.05, 0.2, 0.4, 0.6 and 0.8. A micro-Raman study has been performed on the entire solid solution range and Nd1.6Ba1.4Cu3Oy composition has been observed by TEM. We have shown two structural transitions since the structure is orthorhombic for x = 0.05, tetragonal for 0.2 < x < 0.6 and orthorhombic for x = 0.8. The solid solution changes the vibration of the lattice significantly. An oxygen ordering is observed at x = 0.6 whereas there is no cation ordering in the structure in Raman spectrometry and TEM analysis. No spinodal decomposition is present in Nd1.6Ba1.4Cu3Oy even if an Ar annealing is performed on the powder. The cation ordering appears at x = 0.8 leading to the structural transition.

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页码：8 / 15

页数：8

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