Published January 4, 1993 | Version v1
Journal article Metadata-only

SQUID milliattovoltometry of YBa2Cu3O7-x thin films: Dissipation in low magnetic fields

Creators

  • 1. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111 (United States)
  • 2. AT ampersand T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
  • 3. Department of Physics, University of California, and Materials Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)

Description

The observation of magnetic flux noise in superconducting thin-film flux transformers of YBa2Cu3O7-x enables us to measure a very small, frequency-dependent resistance Rv(f) in the films, caused by vortex motion. In static magnetic fields below 10-6 T and at voltages down to 10-20 V Hz-1/2,Rv is proportional to the frequency f at which the measurement is made, is approximately independent of temperature, and decreases with increasing static current in the transformer. This behavior cannot be explained by certain currently accepted models of dissipation arising from vortex motion, but is consistent with a model in which independent vortices hop between two potential wells in a confined region

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
70
Journal Issue
1
Journal Page Range
p. 89-92.
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
24035420
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BARIUM OXIDES; COPPER OXIDES; DAMPING; DYNAMICS; ELECTRIC CONDUCTIVITY; FREQUENCY DEPENDENCE; HIGH-TC SUPERCONDUCTORS; MOTION; SUPERCONDUCTIVITY; THIN FILMS; TYPE-II SUPERCONDUCTORS; VORTICES; YTTRIUM OXIDES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELECTRICAL PROPERTIES; FILMS; MECHANICS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS