XANES and EXAFS study of (Tl0.5Pb0.5)Sr2(Ca1-xGdx)Cu2Oz superconductors

被引：3

作者：

Zajac, D. A. ^{[1
]}

Woch, W. M. ^{[1
]}

Stepien, J. ^{[1
]}

Kapusta, Cz. ^{[1
]}

Kolodziejczyk, A. ^{[1
]}

Sudra, H. ^{[2
]}

Gritzner, G. ^{[2
]}

机构：

[1] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Dept Solid State Phys, PL-30059 Krakow, Poland

[2] Johannes Kepler Univ Linz, Inst Chem Technol Inorgan Mat, A-4040 Linz, Austria

来源：

RADIATION PHYSICS AND CHEMISTRY | 2013年 / 93卷

关键词：

XANES EXAFS thallium based superconductors; CRITICAL CURRENTS; ABSORPTION; TEMPERATURE;

D O I：

10.1016/j.radphyschem.2013.01.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Results of X-ray absorption spectroscopy study on Gd doped (Tl0.5Pb0.5)Sr-2(Ca1-x,Gd-x)Cu2Oz. (x=0.1, 0.2 and 0.3) superconductors are reported. The Gd L-3 absorption edges were studied in the XANES (near-edge) region and in the EXAFS (extended X-ray absorption) region. The}CANES spectra are typical for Gd in oxide compounds with the absorption edge followed by a strong "white line" peak which slightly decreases its intensity with increasing Gd content x. The Fourier transformed EXAFS spectra reveal two well resolved peaks corresponding to the oxygen nearest neighbours and the cation next neighbour shell, respectively. From simulations and of the EXAFS spectra to the structure of the host 1212 compound the location site of gadolinium is determined and its possible influence on the local structural environment of the site is analyzed. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：33 / 36

页数：4

共 16 条

[1] Thallium-based cuprate superconductors doped with rare earth oxides [J].