Faculté des sciences

Fingerprinting substitution sites in Pb,Dy-Bi2Sr2Ca1Cu2O8+δ using X-ray Photoelectron Diffraction

Popovic, D. ; Bovet, M. ; Berger, H. ; Aebi, Philipp

In: European Physical Journal of Applied Physics (The), 2005, vol. 30, p. 171-174

The substitution sites of Pb and Dy dopants in the cuprate-type high temperature superconductor Bi2Sr2Ca1Cu2O8+δ 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... Plus

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    Summary
    The substitution sites of Pb and Dy dopants in the cuprate-type high temperature superconductor Bi2Sr2Ca1Cu2O8+δ 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.