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Integrated high-<i>T</i> <i>c</i> multiloop magnetometer
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1995
Year
MagnetismMagnetic PropertiesYbco TubeEngineeringThin-film Multiloop MagnetometersSensorsPhysicsNatural SciencesSuperconductivityMagnetic ResonanceApplied PhysicsMagnetic MeasurementFractional Turn SquidsMagnetic Thin FilmsInstrumentationMagnetic DeviceMagnetic MaterialsMagnetic Sensor
Two integrated, thin-film multiloop magnetometers (fractional turn SQUIDs) have been fabricated using a YBa2Cu3O7−x-SrTiO3-YBa2Cu3O7−x multilayer process. The magnetometers have 16 parallel loops, an outer diameter of 7 mm and effective areas of 1.84 and 1.89 mm2, respectively. The magnetic field noise of the better device, measured in a YBCO tube at 77 K with a bias reversal scheme, was 37 fT Hz−1/2 at 1 Hz and 18 fT Hz−1/2 at 1 kHz.