Superconductor Science and Technology · 1993 · 20 citations · 9 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsSolid State PhysicsThin FilmsMagnetic Properties Of SolidsMicrowave MaterialsSuperconducting MaterialsSuperconducting Thin FilmsThin Film Electrical PropertiesCrystallographic OrientationCrystallographic Orientation AnalysisHigh-temperature Superconducting FilmsRaman ScatteringStatic Magnetic FieldSurface Crystallographic OrientationSurface ResistanceYttrium Barium Copper Oxide Films
The structure and crystallographic orientation of YBa2Cu3O7- delta films on BaxSr1-xTiO3/MgO heteroepitaxial layers were investigated by the conventional methods of electron diffraction, electron microscopy and by specific methods of Raman scattering of light and backscattering of middle-energy ions. A film of over 350 nm thick may consist of an inner highly-oriented layer and an outer disoriented one. Measurements of the microwave surface resistance Rs at 60 GHz and 4.2 K have confirmed a complicated character of the film structure. It has been shown that the microwave response of two-layer films in a static magnetic field is determined by the losses in the outer disoriented or granular layer and that the dependence Rs(H-) appeals in the field H- starting from approximately 10 Oe.
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Millimeter wave surface resistance of epitaxially grown YBa2Cu3O7−<i>x</i> thin films
N. Klein, G. Müller, H. Piel et al. · Applied Physics Letters · 1989 · 191 citations
Microstructure of epitaxial YBa2Cu3O7−<i>x</i> thin films
C. W. Nieh, Laurence Anthony, Jack Y. Josefowicz et al. · Applied Physics Letters · 1990 · 76 citations
O. Meyer, F. Weschenfelder, X. X. Xi et al. · Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms · 1988 · 34 citations