Published September 2, 1991
| Version v1
Journal article
Suppression of magnetic-flux noise in YBa2Cu3O7-x by a supercurrent
- 1. Center for Advanced Materials, Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California (USA)
- 2. Department of Physics, University of California, Berkeley, California (USA)
Description
The magnetic-flux noise generated by a patterned film of YBa2Cu3O7-x is reversibly suppressed by the application of a supercurrent. The total noise power decreases by an order of magnitude, in quantitative agreement with a model involving thermally activated vortex hopping between pairs of pinning sites of nearly equal pinning energy. The model yields a force constant of 6x10-5 N/m for a vortex at a typical pinning site, and a hopping distance which increases with temperature from 13 nm at 4.2 K to 64 nm at 60 K. The number density of vortices is at least 0.02 μm-2, even in a magnetic field of less than 1 μT
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 67
- Journal Issue
- 10
- Series
- Phys. Rev. Lett.
- Journal Page Range
- 1346-1349
- ISSN
- 0031-9007
- CODEN
- PRLTA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 23004596
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; CUPRATES; HIGH-TC SUPERCONDUCTORS; MAGNETIC FIELDS; NOISE; QUATERNARY COMPOUNDS; VORTICES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; AMINES; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS