TUTCRIS - Tampereen teknillinen yliopisto


Theoretical studies of structural properties of the high-Tc superconductor Y1Ba2Cu3O7-x



JulkaisuPhysica C: Superconductivity and its Applications
NumeroPART 1
DOI - pysyväislinkit
TilaJulkaistu - 1 tammikuuta 1989
Julkaistu ulkoisestiKyllä
OKM-julkaisutyyppiEi OKM-tyyppiä


Structural properties of the high temperature oxide superconductor Y1Ba2Cu3O7-gc have been studied by static lattice simulation methods. Empirical (ionic) potentials, derived on the basis of experimental data, are used to describe the basic structural properties of the superconductive oxides. Several potential models, with different location of the extra charge for the O7 compound, have been tested with respect to experimental lattice parameters. Fair parametrizations have been found in almost all cases, but they are usually valid only for a specific oxygen content. However, potential models, consistent both for O6 and O7, have been found. We present the best of our ionic models, where, in O7, two thirds of the holes are distributed in the sheet-site oxygens and one third in oxygens between the sheet and chain planes.