TY - JOUR
T1 - Superlattice structures between YBa2Cu3O7-δ and (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ high-Tc cuprates
AU - Hu, Shu-Fen
AU - Liu, R. S.
AU - Jefferson, D. A.
PY - 2000/12/1
Y1 - 2000/12/1
N2 - A solid solution range exists between the systems YBa2Cu3O7-δ and (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ has been successfully synthesized. The microstructures across the solid solution are complicated by the presence of an incommensurate or commensurate modulation. However, the studies indicate unambiguously that the structural modulation is neither a necessary nor sufficient condition for superconductivity among the composition across the solid solution. The modulation may be controlling the cation/oxygen positions in the charge reservoir layers, originating from the different oxygen positions in the perovskite-type (123-type) YBa2Cu3O7-δ and the rock salt-type (1212-type) (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ. The discovery of the superlattice structures between YBa2Cu3O7-δ and (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ adds yet a further chemical dimension to these systems, and may extend the possible avenues of research not only for superconductivity but also for structural chemistry.
AB - A solid solution range exists between the systems YBa2Cu3O7-δ and (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ has been successfully synthesized. The microstructures across the solid solution are complicated by the presence of an incommensurate or commensurate modulation. However, the studies indicate unambiguously that the structural modulation is neither a necessary nor sufficient condition for superconductivity among the composition across the solid solution. The modulation may be controlling the cation/oxygen positions in the charge reservoir layers, originating from the different oxygen positions in the perovskite-type (123-type) YBa2Cu3O7-δ and the rock salt-type (1212-type) (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ. The discovery of the superlattice structures between YBa2Cu3O7-δ and (Pb,Cu)Sr2(Ca,Y)Cu2O7-δ adds yet a further chemical dimension to these systems, and may extend the possible avenues of research not only for superconductivity but also for structural chemistry.
KW - A. Oxides
KW - C. Electron diffraction
KW - D. Microstructure
KW - Electron microscopy
KW - Superconductors
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U2 - 10.1016/S1466-6049(00)00054-4
DO - 10.1016/S1466-6049(00)00054-4
M3 - Article
AN - SCOPUS:0034528679
VL - 2
SP - 645
EP - 649
JO - International Journal of Inorganic Materials
JF - International Journal of Inorganic Materials
SN - 1466-6049
IS - 6
ER -