Penetration depth and microwave loss measurements with a YBa sub 2 Cu sub 3 O sub 7 minus. delta. /LaAlO sub 3 /YBa sub 2 Cu sub 3 O sub 7 minus. delta. trilayer transmission line
- Naval Research Laboratory, Washington, DC (USA)
A trilayer YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}/LaAlO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} transmission line was fabricated to measure the penetration depth of the high-temperature superconducting layers, to determine the microwave losses, and to demonstrate the potential for practical high-temperature superconductor multilayer microwave circuits. All layers were deposited onto a (100) MgO substrate by pulsed laser deposition. The superconducting films are {ital c}-axis oriented with critical temperatures of 89 K. From the phase velocity measurements, the penetration depth was found to be consistent with weak-coupled BCS theory in the local limit with a zero-temperature value of 135 nm. A simple phenomenological temperature dependence for the penetration depth is also presented. This successful trilayer fabrication process, besides allowing the determination of the penetration depth and microwave loss, also expands the possible applications of the high-temperature superconductors.
- OSTI ID:
- 6183019
- Journal Information:
- Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:23; ISSN APPLA; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER
ELEMENTS
FABRICATION
HIGH-TC SUPERCONDUCTORS
JUNCTIONS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALS
MICROWAVE POWER TRANSMISSION
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PHYSICAL PROPERTIES
POWER TRANSMISSION
RARE EARTH COMPOUNDS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES