High temperature superconductor dc-SQUID microscope with a soft magnetic flux guide
Creators
- 1. Institut fuer Festkoerperforschung, Forschungszentrum Juelich GmbH, 52425 Juelich (Germany)
- 2. Zentrallabor fuer Elektronik, Forschungszentrum Juelich GmbH, 52425 Juelich (Germany)
- 3. Fraunhofer-Institut fuer Lasertechnik ILT, 52074 Aachen (Germany)
- 4. Zentralabteilung Technologie, Forschungszentrum Juelich GmbH, 52425 Juelich (Germany)
Description
A scanning SQUID microscope based on high-temperature superconductor (HTS) dc-SQUIDs was developed. An extremely soft magnetic amorphous foil was used to guide the flux from room temperature samples to the liquid-nitrogen-cooled SQUID sensor and back. The flux guide passes through the pick-up loop of the HTS SQUID, providing an improved coupling of magnetic flux of the object to the SQUID. The device measures the z component (direction perpendicular to the sample surface) of the stray field of the sample, which is rastered with submicron precision in the x-y direction by a motorized computer-controlled scanning stage. A lateral resolution better than 10 μm, with a field resolution of about 0.6 nT Hz-1/2 was achieved for the determination of the position of the current carrying thin wires. The presence of the soft magnetic foil did not significantly increase the flux noise of the SQUID
Availability note (English)
Available online at http://stacks.iop.org/0953-2048/17/S191/sust4_5_020.pdf or at the Web site for the journal Superconductor Science and Technology (ISSN 1361-6668) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-2048/17/S191/sust4_5_020.pdf; http://www.iop.org/;
- DOI
- 10.1088/0953-2048/17/5/020;
- PII
- S0953-2048(04)73501-0;
Publishing Information
- Journal Title
- Superconductor Science and Technology
- Journal Volume
- 17
- Journal Issue
- 5
- Journal Page Range
- p. S191-S195
- ISSN
- 0953-2048
- CODEN
- SUSTEF
Conference
- Title
- 6. European conference on applied superconductivity
- Acronym
- EUCAS 2003
- Dates
- 14-18 Sep 2003
- Place
- Sorrento (Italy)
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35069327
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ACCURACY; COUPLING; FOILS; LIQUIDS; MAGNETIC FLUX; MICROSCOPES; NITROGEN; SQUID DEVICES
- Descriptors DEC
- ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; FLUIDS; FLUXMETERS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; NONMETALS; SUPERCONDUCTING DEVICES