1,720,987 research outputs found
Synthesis, single crystal growth and structural determination of new copper oxycarbonates A4CuM(CO3)2O4, A = Sr, Ba, M = Li, Na, Ca
No full textAtomic Local Coordinations and Multivalent States in YBa2Cu3O9-δ Superconductors
No full textEXAFS and XANES spectra at the edges of Cu and Y have been measured in the YBa2Cu3O9-δ(δ 2) superconductor. The oxygen coordination around the two metals is found to generally agree with the model suggested by diffraction experiments, especially as the occurrence of two distinct distances between Cu and O along the perovskite structure c-axis is concerned. Conversely, some evidence is found for a partial occupation of the oxygen sites in the yttrium plane, a result excluded by diffraction experiments. This is better supported by EXAFS spectra at the Y-edge. The XANES spectra of the superconductor are remarkably different from those of Cu oxides suggesting the presence of both divalent and trivalent Cu, in agreement with EXAFS and diffraction results
Synthesis, crystal growth and structural characterisation of barium-copper oxycarbonates Ba2MxCu2−x−y(CO3)yO2+δ (M Cu, Cd, Ca; 0.05 < x < 0.25)
No full text
"Roughness Increase and Dimensional Transitions during the Growth of GdBa2Cu3O7-x Films on NdGaO3"
No full text
H-MODULATED X-BAND MICROWAVE-ABSORPTION IN BI2SR2CACU2OZ POWDER - DEPENDENCE ON THE MAGNETIC-FIELD
No full text- …
