Properties of lift-off structured high T/sub c/ microbridges

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:6087639

Hauser, B; Klopman, B; Blank, D; Rogalla, H

Microbridges and dc-SQUIDs were fabricated in lift-off technique from rf sputtered YBaCuO films on MgO single crystal substrates. Microwave measurements at 9GHz on microbridges and the magnetic field dependence of their critical current reveal wide bridge behavior up to temperatures near the maximum operating temperature of the bridge. Mostly a linear dependence of the critical current on the temperature is found, which is connected to high intrinsic 1/f-nose if the bridge is constant current biased slightly above the critical current. In some bridges and dc-SQUIDs regimes with a temperature dependence proportional to (1-T/T)/sup 1.5/ are found. In this case the 1/f noise level is much smaller and SQUID modulation can be followed to about 65K.

• Research Organization: Univ. of Twente, Low Temperature Div., NL-7500 AE Enschede (NL)
• OSTI ID: 6087639
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
ELECTRONIC EQUIPMENT
EQUIPMENT
FABRICATION
FILMS
FLUXMETERS
FREQUENCY MODULATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC FIELDS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MODULATION
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
RF SYSTEMS
SPUTTERING
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES