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Tunable excitation x-ray-fluorescence spectroscopy in phase-analysis of high-Tc superconductors
Mid Sweden University.
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1994 (English)In: Journal of physics-condensed matter, ISSN 0953-8984, Vol. 6, no 43, 9267-9274 p.Article in journal (Refereed) Published
Abstract [en]

O Kalpha x-ray fluorescence of YBa2Cu3O7-delta and Sr0.85Nd0.15CuO2 samples containing CO3(2-) impurities, as well as pure BaCO3, have been studied using tunable monochromatic synchrotron radiation excitation. When the excitation energy is set to the most intense features in the O 1s absorption edge of cuprates and to bound states above this edge the O Kalpha spectra recorded are very similar to those of pure BaCO3 even if the admixture of CO3(2-) is small. The observed changes in the O Kalpha profiles of multi-phase YBa2Cu3O7-delta and Sr0.85Nd0.15CuO2 samples are discussed in terms of different x-ray absorption cross sections for O in the main phase and in the CO3(2-) fraction.

Place, publisher, year, edition, pages
1994. Vol. 6, no 43, 9267-9274 p.
Keyword [en]
ELECTRONIC-STRUCTURE, GRAIN-BOUNDARY, YBA2CU3O7-DELTA, EDGE
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-1567Local ID: 1101OAI: oai:DiVA.org:miun-1567DiVA: diva2:26599
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved

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