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Fingerprinting substitution sites in Pb,Dy-Bi2 Sr2 Ca1 Cu2 O8+δ using X-ray Photoelectron Diffraction

Published online by Cambridge University Press:  14 April 2005

D. Popović ,
M. Bovet ,
H. Berger  and
P. Aebi
D. Popović*
Affiliation:
FR 7.2 Experimentalphysik, Universität des Saarlandes, 66123 Saarbrücken, Germany
M. Bovet
Affiliation:
Institut de Physique, Université de Neuchâtel, 2000 Neuchâtel, Switzerland
H. Berger
Affiliation:
Institut de Physique Appliquée, EPF, 1015 Lausanne, Switzerland
P. Aebi
Affiliation:
Institut de Physique, Université de Neuchâtel, 2000 Neuchâtel, Switzerland
*
d.popovic@mx.uni-saarland.de
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Abstract

The substitution sites of Pb and Dy dopants in the cuprate-type high temperature superconductor Bi2Sr2Ca1Cu2O $_{8+\delta}$ are determined by a direct comparison of the angle-scanned X-ray photoelectron diffraction (XPD) patterns. We demonstrate the power of XPD as a fingerprinting tool and conclude that Pb occupies Bi sites and Dy the Ca sites. The presence of the incommensurate lattice modulation is not visible in XPD, probably due to a Pb-induced, reduced modulation amplitude.

Keywords

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Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 30 , Issue 3 , June 2005 , pp. 171 - 174
Copyright
© EDP Sciences, 2005

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