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Related Experiment Video

Updated: Feb 8, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

Hexapod Hall scanner for high-resolution large area magnetic imaging.

G K Perkins¹, M Kustov¹, E Lovell¹

¹Blackett Laboratory, Department of Physics, Imperial College, Prince Consort Road, South Kensington, London SW7 2AZ, United Kingdom.

The Review of Scientific Instruments

|July 2, 2018

Summary

A novel six-axis scanning imaging apparatus utilizes piezo bending actuators for precise control of planar sensors. This system minimizes sensor-to-sample distance, enhancing magnetic imaging quality and reducing Hall signal offset.

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Area of Science:

Instrumentation and Measurement
Materials Science
Applied Physics

Background:

Accurate magnetic field mapping requires precise control over sensor positioning and orientation.
Planar sensors like Hall devices are sensitive to their distance and tilt relative to the sample surface.
Existing scanning systems may lack the dexterity for optimal sensor alignment.

Purpose of the Study:

To develop and demonstrate a six-axis scanning imaging apparatus with a large scan range.
To enable in situ correction of probe tilt angle for minimizing sensor-to-sample distance.
To improve the quality of magnetic imaging data acquired by planar sensors.

Main Methods:

Utilizing piezo bending actuators for six degrees of freedom motion control.
Integrating a coupling mechanism with a translation stage for comprehensive scanning.
Employing an indium antimonide (InSb) Hall sensor and a magnetic sample for data acquisition.
Implementing a synchronous commutation setup to reduce Hall signal offset.

Main Results:

The six-axis apparatus provides complete control over sensor position and orientation.
In situ probe tilt correction minimizes the sensor distance to the sample surface.
Alignment optimization significantly impacts the quality of measured magnetic data.
Synchronous commutation effectively reduces Hall signal offset, enhancing image clarity.

Conclusions:

The demonstrated six-axis scanning imaging apparatus offers superior control for high-resolution magnetic imaging.
In situ alignment capabilities are crucial for maximizing data quality with planar sensors.
The synchronous commutation technique provides a significant enhancement for magnetic imaging applications.