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Modelling of the oxygen ordering in YBa2Cu3O7 − xby line group technique

✍ Scribed by Cs. Mészáros; Á. BÁlint; I. Kirschner; R. Laiho; E. Lähderanta; J. Bánkuti

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
197 KB
Volume
21
Category
Article
ISSN
0749-6036

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✦ Synopsis

A symmetry analysis based on line-group formalism is given for the YBa 2 Cu 3 O 7-x high temperature superconductor with 7-x = 6.55, which gives rise to a superlattice phase. The diffuse x-ray scattering intensity curves are calculated for each allowed supersymmetry. An analysis is given for comparison of the experimental and theoretical intensity profiles.

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The thermal conductivities κ(T ) of Ag-doped YBa 2 Cu 3 O 7 sintered materials were measured for various Ag fractions up to f Ag = 0.67. By analyzing the κ(T ) data based on a proposed phenomenological model, the purity of doped Ag in YBa 2 Cu 3 O 7 could be determined.