Thin film BiPbSrCaCuO dc-SQUIDs operating at 78 K
- 1. Inst. of Semiconductors, Academia Sinica, Beijing (China)
- 2. National Inst. of Metrology, Beijing (China)
- 3. Inst. of Electronics, Academia Sinica, Beijing (China)
Description
Dc SQUIDs (Superconducting Quantum Interference Devices) have been successfully fabricated by using Pb doped BiSrCaCuO superconducting thin film made by mixed evaporation from a single source with resistance heater. The dc SQUID comprises a square-washer with a small hole. These SQUIDs show perfectly periodic voltage-flux characteristics without magnetic shield, typically, the flux noise and the energy resolution at a frequency range from DC to 1 Hz and at 78K are 1.7x10-3 Φ0/√Hz and 3.6x10-26 J/Hz, respectively. Meanwhile, we have found that one of our SQUIDs operated on flux-locked mode produces a voltage-flux second harmonic under no bias currents in the measuring circuit. This phenomenon is not well understood, but it is most probably related to the I-V (current-voltage) characteristic of the dc SQUID. (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. 155-161.
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
- 24025588
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; CRITICAL CURRENT; DOPED MATERIALS; ENERGY RESOLUTION; EVAPORATION; FABRICATION; HIGH-TC SUPERCONDUCTORS; JOSEPHSON JUNCTIONS; LEAD ADDITIONS; MAGNETIC FIELDS; NOISE; SQUID DEVICES; STRONTIUM OXIDES; SUPERCONDUCTING FILMS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; THIN FILMS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CURRENTS; ELECTRIC CURRENTS; ELECTRONIC EQUIPMENT; EQUIPMENT; FILMS; FLUXMETERS; MATERIALS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; RESOLUTION; SEMICONDUCTOR JUNCTIONS; STRONTIUM COMPOUNDS; SUPERCONDUCTING DEVICES; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS