Surface-wave characterization of high-Tc superconductors. Final report, 30 September 1984-30 September 1989

Technical Report · Sun Mar 25 23:00:00 EST 1990

OSTI ID:7056306

High Tc superconducting controlling elements for frequency tunable surface acoustic wave SAW filters and dispersion lines in the 0.5 to 4 GHz range have been proposed and designed. Ultrasonic attenuation and velocity measurements in sinter forged YBa2Cu3O7 indicate that the sound waves are interacting with excitations which are confined to the CuO planes. Proximity SAW coupling to a two-dimensional electron gas 2 DEG has placed limits on the localization lengths of the 2 DEG. A new phase transition has been ultrasonically discovered in the mixed state of the heavy Fermion superconductor UPt3. An anomalous increase in attenuation in the superconducting state of the reentrant superconductor system Er(1-x)Ho(x)Rh(4)B4 implies a novel interaction mechanism in this system. SAW measurements on granular superconducting films demonstrate that SAW measure the sheet resistivity of these films on a length scale comparable to the SAW wavelength.

• Research Organization: Wisconsin Univ., Milwaukee, WI (USA). Dept. of Physics
• OSTI ID: 7056306
• Report Number(s): AD-A-221077/1/XAB
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE ALLOYS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ATTENUATION
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DIMENSIONS
DOCUMENT TYPES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON GAS
FILMS
FLUIDS
GASES
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
LENGTH
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLUTONIUM ALLOYS
PROGRESS REPORT
SOUND WAVES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TYPE-II SUPERCONDUCTORS
ULTRASONIC WAVES
URANIUM ALLOYS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES