Tunable excitation x-ray-fluorescence spectroscopy in phase-analysis of high-Tc superconductors

Guo, J.H. (author)

Wassdahl, N (author)

Bray, G (author)

Glans, Peter (author)

Wiell, T (author)

Duda, L.C. (author)

Nordgren, J (author)

Lundström, T (author)

Klauda, M (author)

Markl, J (author)

Fink, C (author)

Saemannischenko, G (author)

(creator_code:org_t)

1994
1994
English.
In: Journal of physics-condensed matter. - 0953-8984. ; 6:43, s. 9267-9274

Abstract Subject headings

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.

By the author/editor: Butorin, S.M; Guo, J.H.; Wassdahl, N; Bray, G; Glans, Peter; Wiell, T; show more...; Duda, L.C.; Nordgren, J; Lundström, T; Klauda, M; Markl, J; Fink, C; Saemannischenko, ...; show less...

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