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Related Experiment Video

Updated: Apr 27, 2026

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

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

Published on: July 20, 2022

AC driven magnetic domain quantification with 5 nm resolution.

Zhenghua Li¹, Xiang Li², Dapeng Dong¹

¹Liaoning Key Lab of Optoelectronic Films & Materials, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, 116600, China.

Scientific Reports

|July 12, 2014

Summary

This summary is machine-generated.

A new side-band magnetic force microscopy (MFM) technique allows observation of alternating magnetic fields at the nanoscale. This advancement enables precise measurement of magnetic moments and domain wall motion for next-generation data storage and biomedical applications.

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Area of Science:

Physics
Materials Science
Nanotechnology

Background:

Increasing magnetic storage density requires understanding dynamic magnetism at the nanoscale.
Conventional magnetic force microscopy (MFM) lacks atomic resolution and cannot characterize dynamic magnetism due to sensing static magnetic fields.

Purpose of the Study:

To develop a side-band MFM technique for observing alternating magnetic fields at nanometer length scales.
To enable local determination of magnetic moments and characterization of dynamic magnetic phenomena.

Main Methods:

Development of a side-band magnetic force microscopy (MFM) technique.
Operating at a close proximity of 1 nm between tip and sample.
Quantification of magnetic domain wall motion using micromagnetics.

Main Results:

Demonstrated observation of alternating magnetic fields and time-variable magnetic domain reversals.
Successfully quantified magnetic domain wall motion related to magnetization rotation.
Achieved local determination of magnetic moments within a 5-nanometer volume.

Conclusions:

Side-band MFM provides unprecedented nanoscale insight into dynamic magnetism.
The technique is applicable to diverse magnetic materials for investigating microscopic domain structures.
Opens avenues for advanced applications in data storage and biomedicine.