Title :
DC SQUID in YBaCuO ceramics operating at 77 K
Author :
Sing, M. L Chok ; Robbes, D. ; Monfort, Y. ; Bloyet, D. ; Provost, J. ; Raveau, B.
Author_Institution :
ISMRa, Caen, France
fDate :
3/1/1989 12:00:00 AM
Abstract :
Constrictions with typical cross-sectional areas of 10-8-10-7 m2 engraved in bulk YBa2 Cu3O7-d ceramics operate as DC SQUIDs (superconducting quantum interference devices) at 77 K. These sensors have a magnetic field sensitivity of 1 to 20 pT/√Hz, a flux sensitivity of 6×10-6 to 3×10-5 φ 0/√Hz, and a corresponding energy resolution in the 10 -30-10-29 J/Hz range around 20 kHz. The noise spectral density of the device clearly exhibits low-frequency 1/f noise, which scales throughout the whole investigated range of frequencies. The noise spectra at 1 Hz varies between 5×10-27 and 2×10-26 J/Hz
Keywords :
SQUIDs; barium compounds; electric sensing devices; electron device noise; high-temperature superconductors; magnetic field measurement; random noise; yttrium compounds; 77 K; DC SQUIDs; YBa2Cu3O7-d; ceramics; cross-sectional areas; energy resolution; flux sensitivity; high temperature superconductor; low-frequency 1/f noise; magnetic field sensitivity; noise spectra; noise spectral density; Ceramics; Energy resolution; Frequency; Interference; Low-frequency noise; Magnetic sensors; SQUIDs; Superconducting device noise; Superconducting devices; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
