Temperature-dependent x-ray studies of the high- superconductor
- 1 May 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (13), 7140-7141
- https://doi.org/10.1103/physrevb.35.7140
Abstract
Simultaneous x-ray diffraction and four-probe electrical resistance measurements have been performed as a function of temperature on a polycrystalline sample of the high- material . Comparisons of the diffraction spectra between 290 and 18 K show no evidence of any gross structural distortions. Least-squares refinements of the tetragonal unit-cell parameters at several temperatures indicate smooth monotonic thermal expansions of about 0.10±0.05% along the a axis and about 0.35±0.10% along the c axis over this temperature range.
Keywords
This publication has 5 references indexed in Scilit:
- Superconducting phase transitions in the La-M-Cu-O layered perovskite system,M=La, Ba, Sr, and PbPhysical Review B, 1987
- Lattice instability and high- superconductivity inPhysical Review Letters, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986
- Energy-dispersive x-ray diffraction with synchrotron radiation at cryogenic temperaturesReview of Scientific Instruments, 1984
- The structure of La2CuO4 and LaSrVO4Journal of Solid State Chemistry, 1973