Published 1992 | Version v1
Book Metadata-only

A low noise dc-SQUID based on Nb/Al-AlOx/Nb Josephson junctions

Creators

  • 1. Technical Research Centre of Finland, Semiconductor Lab., Espoo (Finland)
  • 2. Helsinki Univ. of Tech., Metrology Research Inst., Espoo (Finland)
  • 3. Technical Research Centre of Finland, Espoo (Finland)
  • 4. Physikalisch-Technische Bundesanstalt, Inst. Berlin (Germany)

Description

Low noise dc SQUIDs based on a Nb/Al-AlOx/Nb Josephson junction technology have been developed. The design has been optimized for improved control of the resonances. An eight-level process has been used for device fabrication. Flux noise levels of 2.8x10-7Φ0/√Hz at 1 kHz and 1.5x10-6Φ0/√Hz at 1 Hz have been measured for an integrated SQUID magnetometer having 3 μm2 junctions, a 12-turn input coil, and a dc SQUID inductance Ldc = 11 pH. (orig.)

Additional details

Publishing Information

Publisher
Springer.
Imprint Place
Berlin (Germany)
ISBN
3-540-55396-7
Imprint Title
Superconducting devices and their applications. Proceedings
Imprint Pagination
618 p.
Journal Volume
64
Series
Springer proceedings in physics.
Journal Page Range
p. 281-285.

Conference

Title
Superconducting devices and their applications.
Acronym
4. international conference on superconducting and quantum effect devices (SQUID-4)
Dates
18-21 Jun 1991.
Place
Berlin (Germany).

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
24025610
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ALUMINIUM; ALUMINIUM OXIDES; CRITICAL CURRENT; FABRICATION; JOSEPHSON JUNCTIONS; MAGNETIC FLUX; MAGNETOMETERS; NIOBIUM; NOISE; OPTIMIZATION; SPECTRAL DENSITY; SQUID DEVICES
Descriptors DEC
ALUMINIUM COMPOUNDS; CHALCOGENIDES; CURRENTS; ELECTRIC CURRENTS; ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; FLUXMETERS; FUNCTIONS; MEASURING INSTRUMENTS; METALS; MICROWAVE EQUIPMENT; OXIDES; OXYGEN COMPOUNDS; SEMICONDUCTOR JUNCTIONS; SPECTRAL FUNCTIONS; SUPERCONDUCTING DEVICES; TRANSITION ELEMENTS