Characterization of high T/sub c/ superconductor by luminescence methods

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:5916914

Fujiwara, Y; Kobayashi, T

High T/sub c/ superconductors have been systematically investigated by photo- (PL) and x-ray excited thermally stimulated luminescence (TSL) techniques. In PL measurements, characteristic PLs have been observed in the infrared region of the Er-Ba-Cu-O and Nd-Ba-Cu-O systems, which are tentatively assigned to electronic transitions between weakly crystal-field split spin-orbit levels of trivalent Er and Nd ions. The spectral shapes and/or peak positions are significantly dependent on the crystal arrangement surrounding the rare-earth ion. Such PLs have never been obtained in the Eu-Ba-Cu-O and Yb-Ba-Cu-O systems, which might reflect their band structures. TSL measurements have been performed with particular emphasis on the Gd-Ba-Cu-O system. Characteristic TSLs have been observed in this system, depending on the composition, preparation conditions and cumulative x-ray irradiation time. The activation energy of the related traps range from 0.1 eV to 0.3 eV. Characteristic TSLs have also been observed in the Ho-Ba-Cu-O and new high T/sub c/ superconducting systems including no rare-earth elements, e.g., Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O.

• Research Organization: 4969400
• OSTI ID: 5916914
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ENERGY
ERBIUM COMPOUNDS
ERBIUM IONS
ERBIUM OXIDES
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
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HIGH TEMPERATURE
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
IONS
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NEODYMIUM IONS
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ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
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