Magnetic flux noise in thin-film rings of YBa2Cu3O/sub 7-//sub δ/
Creators
- 1. Department of Physics, University of California, Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720
Description
The low-frequency magnetic flux noise in thin-film rings of YBa2Cu3O/sub 7-//sub δ/ (YBCO) is measured over the temperature range 1.3--125 K by means of a dc superconducting quantum interference device (SQUID) maintained at liquid-helium temperatures. Below the transition temperature T/sub c/ of the YBCO, the spectral density of the noise scales as 1/f, where f is the frequency, and generally increases with increasing temperature. The magnitude of the noise depends strongly on the microstructure of the film, and is lowest for a sample which is predominantly oriented with its c axis perpendicular to the substrate. These results imply that SQUID's and flux transformers of YBCO must be fabricated from highly oriented films to produce good resolution at low frequencies
Additional details
Publishing Information
- Journal Title
- Appl. Phys. Lett.
- Journal Volume
- 53
- Journal Issue
- 8
- Series
- Appl. Phys. Lett.
- Journal Page Range
- 695-697
- ISSN
- 0003-6951
- CODEN
- APPLA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19104322
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; EXPERIMENTAL DATA; FABRICATION; MAGNETIC FLUX; MICROSTRUCTURE; NOISE; PEROVSKITE; RESOLUTION; SQUID DEVICES; SUPERCONDUCTORS; THIN FILMS; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL STRUCTURE; DATA; ELECTRONIC EQUIPMENT; EQUIPMENT; FILMS; FLUXMETERS; INFORMATION; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; MINERALS; NUMERICAL DATA; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; SUPERCONDUCTING DEVICES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS