Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1995-03-29
1996-08-20
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
324248, 505162, 505220, 505705, H01F 722, H01L 3924, G01R 33035
Patent
active
055482627
ABSTRACT:
A flux transformer comprises a pickup coil 1, an input coil 2 and a pair of lines 3, 4. The line 4 contains a bridge part 4a intersecting the input coil 2. The pickup coil 1, input coil 2 and a pair of lines 3, 4 are formed of a first and a second oxide superconducting thin films 11, 13. Furthermore, the flux transformer comprises a non-superconducting thin film 12. The non-superconducting thin film 12 is disposed between the first and the second oxide superconducting thin films 11, 13 and is located in a domain wherein the line 4 intersects the input coil 2. A pattern of the first oxide superconducting thin film 11 corresponds to the pickup coil 1, the input coil 2 and the lines 3,4 except the bridge part 4a. The pattern of the second oxide superconducting thin film 13 corresponds to the input coil 2 except the domain where the non-superconducting thin film exits, the pickup coil 1 and the lines 3,4. Except in the domain where the non-superconducting thin film 12 exists, the second oxide superconducting thin film 13 are piled up directly atop the first oxide superconducting thin film 11 in all domains.
REFERENCES:
Oh, et al., "Multilevel YbaCuO flux transformers with high T.sub.c SQUIDs: A prototype high T.sub.c SQUID magnetrometer working at 77 K", Appl. Phys. Lett. 59(1), 1 Jul. 1991, pp. 123-125.
Miklich, et al., "Sensitive YBa.sub.2 Cu.sub.3 O.sub.7-x thin-film magnetometer", Appl. Phys. Lett. 59(8), 19 Aug. 1991, pp. 988-990.
Welistood, et al., "Superconducting thin-firm multiturn coils of YBa.sub.2 Cu.sub.3 O.sub.7-x ", Appl. Phys. Lett. 56(23), 4 Jun. 1990, pp. 2336-2338.
Husemann, et al. "Spatially resolved electrical characterization of a YBa.sub.2 CU.sub.3 O.sub.7-.delta. flux", Appl. Phys. Lett. 62(22), 31 May 1993, pp. 2871-2873.
Kugai Hirokazu
Nagaishi Tatsuoki
Barrera Ramon M.
Picard Leo P.
Sumitomo Electric Industries Ltd.
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