Power and magnetic field-induced microwave absorption in Tl-based high T sub c superconducting films

Journal Article · Mon Jan 21 00:00:00 EST 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104670· OSTI ID:6193958

Portis, A M ^[1]; Cooke, D W; Gray, E R; Arendt, P N ^[2]; Bohn, C L; Delayen, J R; Roche, C T ^[3]; Hein, M; Klein, N; Mueller, G; Orbach, S; Piel, H ^[4]

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1. University of California at Berkeley, Berkeley, California 94720 (US)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US)
3. Argonne National Laboratory, Argonne, Illinois 60439 (US)
4. Bergische Universitaet Wuppertal, Wuppertal, Germany (DE)

The increase in the microwave surface resistance {ital R}{sub {ital s}} of high {ital T}{sub {ital c}} superconductors at elevated microwave power levels is reported for both oriented and unoriented Tl-based films as a function of rf magnetic field at 820 MHz and 18 GHz. The application of dc magnetic fields produces qualitatively similar increases in {ital R}{sub {ital s}} and in the surface reactance {ital X}{sub {ital s}}. The increase in {ital R}{sub {ital s}} with dc field is shown to arise from simple decoupling of grains by intergranular magnetic flux. The increase in {ital R}{sub {ital s}} with microwave power, on the other hand, is a consequence of hysteretic intergranular processes.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6193958
• Journal Information: Applied Physics Letters; (USA), Vol. 58:3; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
MAGNETIC PROPERTIES
OPTICAL PROPERTIES
CALCIUM OXIDES
COPPER OXIDES
TELLURIUM OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIC FLUX
MICROWAVE RADIATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTROMAGNETIC RADIATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SUPERCONDUCTORS
TELLURIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties