High Tc superconducting magnetic multivibrators for fluxgate magnetic-field sensors

Conference · Fri Sep 01 04:00:00 EDT 1989 · IEEE (Institute of Electrical and Electronics Engineers) Transactions on Magnetics; (USA)

OSTI ID:5290081

Mohri, K; Uchiyama, T; Ozeki, A ^[1]

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1. Nagoya Univ. (Japan). Faculty of Engineering

Sensitive and quick-response nonlinear inductance characteristics are found for high Tc superconducting (YBa/sub 2/Cu/sub 3/O/sub 7-chi/) disk cores at 77K in which soft magnetic BH hysteresis loops are observed. Various quick response magnetic devices such as modulators, amplifiers and sensors are built using these cores. The magnetizing frequency can be set to more than 20 MHz, which is difficult for conventional ferromagnetic bulk materials such as Permalloy amorphous alloys and ferrite. New quick-response fluxgate type magnetic-field sensors are made using ac and dc voltage sources. The former is used for second-harmonic type sensors, while the latter is for voltage-output multivibrator type sensors. Stable and quick-response sensor characteristics were obtained for two-core type multivibrators.

• OSTI ID: 5290081
• Report Number(s): CONF-890309--
• Conference Information: Journal Name: IEEE (Institute of Electrical and Electronics Engineers) Transactions on Magnetics; (USA) Journal Volume: 25:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AMORPHOUS STATE
AMPLIFIERS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXGATE MAGNETOMETERS
HIGH TEMPERATURE
HYSTERESIS
IRON ALLOYS
MAGNETIC DISKS
MAGNETIC FIELDS
MAGNETIC STORAGE DEVICES
MAGNETOMETERS
MEASURING INSTRUMENTS
MEMORY DEVICES
MULTIVIBRATORS
NICKEL ALLOYS
NONLINEAR PROBLEMS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PERMALLOY
PHYSICAL PROPERTIES
PULSE CIRCUITS
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES