Millimeter wave surface resistance of RBa sub 2 Cu sub 3 O sub 7-. delta. (R = Y, Eu, Dy, Sm, Er) superconductors
The measurements are reported of the millimeter wave surface resistance R(sub s) at 58.6 GHz of bulk samples of RBa{sub 2}Cu{sub 3}O(7-delta) (R = Y,Eu,Dy,Sm,Er) and of YBa{sub 2}Cu{sub 3}O(7-delta) superconducting films, in the temperature range from 20 to 300 K. The bulk samples were prepared by cold pressing the powders of RBa{sub 2}Cu{sub 3}O(7-delta) into one in. disks. The powders were prepared by several sinterings in one atmosphere of oxygen at 925 C, with grindings between sinterings, to obtain the superconducting phase. The thin films were deposited on SrTiO{sub 3} and LaGaO{sub 3} substrates by pulsed laser ablation. Each sample was measured by replacing the end wall of a gold-plated Te{sub 013} circular mode copper cavity with the sample and determining the cavity quality factor . From the difference in the Q-factor of the cavity, with and without the sample, the R{sub s} of the sample was determined.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 6739284
- Report Number(s):
- N-90-20886; NASA-TM--102571; E--5395; NAS--1.15:102571; CONF-900384--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COLD PRESSING
COPPER COMPOUNDS
COPPER OXIDES
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ERBIUM COMPOUNDS
ERBIUM OXIDES
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
FABRICATION
FILMS
HIGH-TC SUPERCONDUCTORS
MATERIALS WORKING
MICROWAVE RADIATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDERS
PRESSING
QUALITY FACTOR
RADIATIONS
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
SAMARIUM OXIDES
SUBSTRATES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SURFACE PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES