X-ray and neutron diffracton study of La1Ba2Cu3O9-δ: Influence of the Cu-O structure on Tc
Abstract
X-ray and neutron diffraction studies on La1Ba2Cu3O9-δ demonstrate that the structure of this compound closely resembles that of Y1Ba2Cu3O9-δ. The importance of oxygen ordering on the outer Cu planes for high-Tc superconductivity is stressed. Broadening in the diffraction peaks as Tc is decreased is indicative of greater disorder in the La or Ba sites and/or the oxygen configuration. Evidence for the existence of octahedral Cu-O configurations between unit cells, possibly associated with a Ba-doped La3-xBa3+xCu6O14+y (x=1) phase, is minimal.
- Publication:
-
Physical Review B
- Pub Date:
- January 1988
- DOI:
- 10.1103/PhysRevB.37.607
- Bibcode:
- 1988PhRvB..37..607S