|Author||Hwang, D. M. ♦ Nazar, L. ♦ Venkatesan, T. ♦ Wu, X. D.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||MATERIALS SCIENCE ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ BARIUM OXIDES ♦ CRYSTAL STRUCTURE ♦ SUPERCONDUCTIVITY ♦ TRANSITION TEMPERATURE ♦ COPPER OXIDES ♦ YTTRIUM OXIDES ♦ AMORPHOUS STATE ♦ ELECTRIC CONDUCTIVITY ♦ EXPERIMENTAL DATA ♦ GRAIN BOUNDARIES ♦ GRAIN SIZE ♦ INTERFACES ♦ LASER RADIATION ♦ LATTICE PARAMETERS ♦ MICROSTRUCTURE ♦ POLYCRYSTALS ♦ STRONTIUM TITANATES ♦ SUPERCONDUCTING FILMS ♦ SURFACE COATING ♦ THICKNESS ♦ THIN FILMS ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ ALKALINE EARTH METAL COMPOUNDS ♦ BARIUM COMPOUNDS ♦ CHALCOGENIDES ♦ COPPER COMPOUNDS ♦ CRYSTALS ♦ DATA ♦ DEPOSITION ♦ DIMENSIONS ♦ ELECTRICAL PROPERTIES ♦ ELECTROMAGNETIC RADIATION ♦ ELECTRON MICROSCOPY ♦ FILMS ♦ INFORMATION ♦ MICROSCOPY ♦ NUMERICAL DATA ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ PHYSICAL PROPERTIES ♦ RADIATIONS ♦ SIZE ♦ STRONTIUM COMPOUNDS ♦ THERMODYNAMIC PROPERTIES ♦ TITANATES ♦ TITANIUM COMPOUNDS ♦ TRANSITION ELEMENT COMPOUNDS ♦ YTTRIUM COMPOUNDS 360202* -- Ceramics, Cermets, & Refractories-- Structure & Phase Studies ♦ Condensed Matter PhysicsSuperconductivity|
|Abstract||The polycrystalline structure of pulsed-laser deposited Y-Ba-Cu-O thin films was studied using transmission electron microscopy. Many grains of the superconducting films on (001) SrTiO/sub 3/ substrates had the c axis normal to the surface, while grains on (110) facets had their c axis oriented preferentially along the interface. Observation of an amorphous layer of thickness approx.6 nm at some oriented grain-substrate interfaces suggests that the amorphous layer is formed subsequent to the formation of the crystalline structures. Surface ridges were found to facilitate the formation of triple points where the grain boundaries between nonepitaxial grains were pinned.|
|Learning Resource Type||Article|
|Publisher Department||Bell Communications Research, Red Bank, New Jersey 07701|
|Publisher Place||United States|
|Journal||Appl. Phys. Lett.|
|Organization||Bell Communications Research, Red Bank, New Jersey 07701|
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