Microstructural observations of RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Gd, Y, and Tm) superconductor thin crystals between 15 and 1000 K
Small crushed crystals of the new superconductor materials of the type RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Gd, Y, and Tm) were studied by conventional transmission electron microscopy between 15 and 1000 K. Between 15 and 300 K a He-liquid cold stage was used, while temperatures between 300 and 1000 K were obtained by focusing the electron beam. The thin-edge areas unambiguously show the formation of the classical orthorhombic structure. The orthorhombic-tetragonal transition, in the course of the cooling, was not observed. Electron diffraction results show the presence of various unknown structures and the BaCuO/sub 2/ compound. The crystals present few defects: Only some twins and dislocations have been observed.
- Research Organization:
- Centre de Spectrometrie Nucleaire et Spectrometrie de Masse, Bat. 108, 91406 Orsay Cedex, France
- OSTI ID:
- 5978221
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 62:12
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM OXIDES
MICROSTRUCTURE
COPPER OXIDES
GADOLINIUM OXIDES
PEROVSKITES
THULIUM OXIDES
TYPE-II SUPERCONDUCTORS
YTTRIUM OXIDES
DISLOCATIONS
EXPERIMENTAL DATA
HIGH TEMPERATURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
ORTHORHOMBIC LATTICES
TRANSMISSION ELECTRON MICROSCOPY
TWINNING
ULTRALOW TEMPERATURE
VERY HIGH TEMPERATURE
VERY LOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
ELECTRON MICROSCOPY
GADOLINIUM COMPOUNDS
INFORMATION
LINE DEFECTS
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
THULIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies