Published August 1, 1975 | Version v1
Journal article Metadata-only

Thin-film dc SQUID with low noise and drift

Creators

  • 1. Department of Physics, University of California

Description

We describe the fabrication and operation of thin-film dc SQUID's of cylindrical geometry that make use of shunted Nb-NbO/subx/-Pb tunnel junctions. A typical noise power spectrum is shown. At frequencies between 2times10-2 Hz and the electronic roll-off frequency, the flux resolution is 3.5times10-5 phi0/(Hz)1/2, corresponding to a magnetic field resolution of 10-10 G/(Hz)1/2. This resolution appears to be set by intrinsic sensor noise. Below 2times10-2 Hz, the spectrum is approximately 1/f. A 20-h plot of SQUID output as a function of time demonstrates an average drift of less than 2times10-5 phi0/h

Additional details

Identifiers

DOI
10.1063/1.88391;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
27
Journal Issue
3
Series
Appl. Phys. Lett.
Journal Page Range
155-156
ISSN
0003-6951

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
6215472
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
CRITICAL CURRENT; FABRICATION; FILMS; LEAD; MAGNETIC FIELDS; MAGNETIC FLUX; NIOBIUM; NIOBIUM OXIDES; SQUID DEVICES; SUPERCONDUCTING JUNCTIONS; TEMPERATURE DEPENDENCE; TEMPERATURE NOISE; TUNNEL EFFECT
Descriptors DEC
CHALCOGENIDES; CURRENTS; ELECTRIC CURRENTS; ELECTRONIC EQUIPMENT; ELEMENTS; FLUXMETERS; MEASURING INSTRUMENTS; METALS; MICROWAVE EQUIPMENT; NIOBIUM COMPOUNDS; NOISE; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS

Optional Information

Notes
Updated automatically by Metadata and Full-Text Enrichment Agent