Surface impedance measurements and calculations according to the Mattis Bardeen theory on high-T sub c superconductors

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5930374

Kataria, N D; Popel, R; Wolf, W; Sachse, H; Niemeyer, J ^[1]; Kuhlemann, T ^[2]

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1. Physikalisch-Technische Bundesanstalt, 3300 Braunschweig (DE)
2. Inst. fuer Hochfrequenztechnik, Technische Univ., 3300 Braunschweig (DE)

In this paper the surface impedance measurements made on YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} (YBCO) films are reported and compared with the exact solution of the Mattis Bardeen theory applied to strong coupling superconductors. Epitaxial films of YBCO were grown by the coevaporation of Y, BaF{sub 2} and Cu and ex-situ wet O{sub 2} annealing. The films were deposited at substrate temperatures T{sub s} ranging from 200{degrees} C to 820{degrees} C. X-ray diffraction shows that the films grown in the temperature range 720{degrees} C-780{degrees} C are epitaxial with the c-axis perpendicular to the substrate surface. Surface impedance of the samples were measured using a cylindrical copper cavity at 66.8 GHz.

• OSTI ID: 5930374
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
DATA
DEPOSITION
DIFFRACTION
EPITAXY
FILMS
HEAT TREATMENTS
IMPEDANCE
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SUBSTRATES
SUPERCONDUCTING FILMS
SURFACE PROPERTIES
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THEORETICAL DATA
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES