Noise measurements in a composite niobium/YBCO SQUID and determination of the magnetic noise by direct measurement

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5921721

Harrop, S P; Keene, M N; Muirhead, C M; Gough, C E ^[1]

---

1. Superconductivity Research Group, Univ. of Birmingham, Birmingham B15 2TT (GB)

We have measured the noise performance of a composite niobium/YBCO point contact 2-hole SQUID, at 4.2 K in both rf and dc bias modes. The noise was measured by a technique which allowed the component which was flux noise to be measured. The flux noise was found to be the same in both bias modes. A direct measurement of the noise in a single hole in the same sample was made as a function of temperature and was found to display two peaks. Possible causes are discussed in this paper.

• OSTI ID: 5921721
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
SQUID DEVICES
FLUX QUANTIZATION
SUPERCONDUCTING COMPOSITES
BARIUM OXIDES
COPPER OXIDES
HOLES
MAGNETIC FLUX
NIOBIUM
NOISE
PERFORMANCE TESTING
SUPERCONDUCTIVITY
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUXMETERS
MATERIALS
MEASURING INSTRUMENTS
METALS
MICROWAVE EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTING DEVICES
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
665412* - Superconducting Devices- (1992-)
665411 - Basic Superconductivity Studies- (1992-)
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)