Extended x-ray-absorption fine-structure experiment on the high-T/sub c/ superconductor YBa/sub 2/Cu/sub 3/O/sub 7/. sqrt. /sub delta/

Journal Article · Tue Mar 01 00:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.37.3375· OSTI ID:5355794

Zhang, K; Bunker, G B; Zhang, G; Zhao, Z X; Chen, L Q; Huang, Y Z

X-ray-absorption spectroscopy has been used to study the high-T/sub c/ superconductor YBa/sub 2/Cu/sub 3/O/sub 7/ on all three metal elements. The structure determined is consistent with diffraction results, except for some slight differences. Analysis of the yttrium K-edge x-ray-absorption fine-structure (EXAFS) experiment suggested that the Y-O distance split further into two distances at 80 K. The temperature dependence of the Cu-O bond strength indicated that the system below T/sub c/ is more disordered than an Einstein model predicted. The bond strengths determined by the temperature dependence of the EXAFS Debye-Waller factor showed clearly that the Cu(2) planes are strongly coupled with each other through yttrium-oxygen bonds, and are weakly coupled to the other planes

• Research Organization: Institute for Structural and Functional Studies, 3401 Market Street, Philadelphia, Pennsylvania 19104
• OSTI ID: 5355794
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 37:7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
ABSORPTION SPECTRA
CHEMICAL BONDS
X-RAY SPECTRA
COPPER OXIDES
YTTRIUM OXIDES
CRYSTAL STRUCTURE
SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
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360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
656100 - Condensed Matter Physics- Superconductivity