Microstructure of epitaxially oriented superconducting YBa/sub 2/Cu/sub 3/O/sub 7/minus//ital x// films grown on (100) MgO by metalorganic decomposition

Journal Article · Mon Jul 17 04:00:00 EDT 1989 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.102406· OSTI ID:6012277

Lee, S; Chen, S; Hung, L S; Braunstein, G

The microstructure in epitaxially oriented thin films of YBa/sub 2/Cu/sub 3/O/sub 7/minus//ital x// grown on (100) MgO by metalorganic decomposition has been studied by transmission electron microscopy and ion channeling. The as-prepared films consisted of single-crystal platelets lying flat on the MgO surface. The majority of the crystallites showed perfect alignment of their /ital c/ axis with the (100) axis of MgO, while some crystallites were found to have a misorientation of up to 7.5/degree/. Images of the interfacial regions showed good epitaxial growth to within one lattice spacing of the MgO substrate. He/sup ++/ channeling measurements as a function of energy from 1 to 4.5 MeV indicated a 0.51/degree/ spread in crystallite orientation. Extrapolation of the channeling measurements to the limit of zero crystallite spread gave a minimum yield of 0.20 for bulk YBa/sub 2/Cu/sub 3/O/sub 7/minus//ital x// , which is much larger than the value reported for single crystals. The large backscattering yield is attributed to the grain boundaries in the film. A relatively strain-free interface was indicated by channeling results.

• Research Organization: Corporate Research Laboratories, Eastman Kodak Company, Rochester, New York 14650 (US)
• OSTI ID: 6012277
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 55:3; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALIGNMENT
ALKALINE EARTH METAL COMPOUNDS
BACKSCATTERING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHANNELING
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DATA
ENERGY RANGE
EPITAXY
EXPERIMENTAL DATA
FILMS
HELIUM IONS
INFORMATION
INTERFACES
ION CHANNELING
IONS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MEV RANGE
MEV RANGE 01-10
MICROSTRUCTURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRAINS
SUPERCONDUCTING FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES