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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

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Published on: July 20, 2022

Multisensor Magnetic Scanning Microscope for Remanent Magnetic Field Measurements.

João F Chaves¹, Leosdan F Noris¹, Elder Yokoyama²

¹Department of Physics, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22451-900, Brazil.

Sensors (Basel, Switzerland)

|April 13, 2024

Summary

This summary is machine-generated.

This study enhanced Magnetic Scanning Microscopy (MSM) for visualizing magnetic fields. The improved system accurately maps material magnetization, proving useful for geological and material science applications.

Keywords:

Delta-Mode Hall sensor Magnetic Scanning Microscopy Magnetoresistance sensor remanent fields

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Area of Science:

Materials Science
Geophysics
Biomedicine

Background:

Magnetic Scanning Microscopy (MSM) is valuable for visualizing magnetic fields in diverse fields like geology, biomedicine, and materials science.
Analyzing remanent fields requires specialized equipment for accurate magnetic field visualization.
Existing MSM systems can be improved for enhanced sensitivity and robustness.

Purpose of the Study:

To modify and enhance a Magnetic Scanning Microscopy (MSM) system for improved visualization of magnetic fields.
To adapt the MSM for analyzing remanent fields using a μ-metal magnetic shielding structure.
To evaluate and integrate specific sensors (HQ-0811 and STJ-010) and instrumentation for robust data acquisition.

Main Methods:

Modified the MSM reading system with a μ-metal magnetic shielding structure.
Integrated HQ-0811 and STJ-010 sensors, standardizing HQ-0811 on PCBs.
Utilized piezoelectric stepper motors for sample manipulation and Keithley instruments for data acquisition.

Main Results:

Developed a robust MSM system capable of analyzing remanent fields with selected sensors.
A MATLAB program was created for image analysis and magnetization extraction.
Successfully mapped a rock sample from the Parnaíba Basin, demonstrating system capabilities.

Conclusions:

The enhanced MSM system provides effective visualization of magnetic fields and material magnetization.
The modifications increase system robustness and facilitate handling.
The system is suitable for applications in geology, materials characterization, and potentially biomedicine.