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High-resolution scanning SQUID microscope
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1995
Year
EngineeringMicroscopyQuantum SensingDetector PhysicsSuper-resolution MicroscopyMagnetic SensorMagnetismMicroscopy MethodSuperconductivityQuantum MaterialsComputational ImagingInstrumentationSuperconducting DevicesBiophysicsQuantum SciencePhysicsMagnetic MeasurementSuper-resolutionSquid MicroscopeAbsolute CalibrationScanning Probe MicroscopyBiomedical ImagingApplied PhysicsNovel Low TemperatureElectron MicroscopeQuantum DevicesMagnetic DeviceMedicine
We have combined a novel low temperature positioning mechanism with a single-chip miniature superconducting quantum interference device (SQUID) magnetometer to form an extremely sensitive new magnetic microscope, with a demonstrated spatial resolution of ∼10 μm. The design and operation of this scanning SQUID microscope will be described. The absolute calibration of this instrument with an ideal point source, a single vortex trapped in a superconducting film, will be presented, and a representative application will be discussed.