X-ray-scattering study of finite-range order in Ba/sub 2/YCu/sub 3/O/sub 6. 7/

Journal Article · Sun May 01 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.37.7920· OSTI ID:5220948

Fleming, R M; Schneemeyer, L F; Gallagher, P K; Batlogg, B; Rupp, L W; Waszczak, J V

We have observed evidence of finite-range order in quenched crystals of nominal composition Ba/sub 2/YCu/sub 3/O/sub 6.7/. X-ray scattering shows diffuse peaks with a reduced wave vector of (12,0,0) in the oxygen-deficient compound but not in fully oxidized Ba/sub 2/YCu/sub 3/O/sub 7/. Although the crystals are twinned, we find that the diffuse satellites occur symmetrically around (h,0,0) peaks rather than (0,k,0) peaks indicating a doubling of the unit cell along the a axis (transverse to the Cu-O chains). The width of the diffuse peaks yields coherence lengths of 21, 16, and 9 A for the a/sub 0/, b/sub 0/, and c/sub 0/ directions, respectively

• Research Organization: ATandT Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 5220948
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:13; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENCE LENGTH
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
DIFFRACTION
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LENGTH
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUENCHING
SCATTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES