MFM Analysis
Magnetic Force Microscopy analysis: convert between MFM phase/force gradient and magnetic field quantities using Fourier-domain transfer functions. Equivalent to Gwyddion's mfm_*.c modules.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input MFM data (phase, force gradient, or field) |
Outputs
| Name |
Type |
Description |
| result |
DATA_FIELD |
Converted MFM quantity |
Controls
| Name |
Type |
Default |
Description |
| operation |
dropdown |
phase_to_force_gradient |
Conversion: phase_to_force_gradient, force_gradient_to_field, charge_density, magnetisation |
| lift_height |
FLOAT |
50e-9 |
Tip-sample separation in metres |
Notes
- phase_to_force_gradient: Convert MFM phase shift to force gradient using the cantilever spring constant relationship.
- force_gradient_to_field: Recover the magnetic field from force gradient data via Fourier-domain deconvolution. Output unit: A/m.
- charge_density: Compute effective magnetic charge density. Output unit: A/m².
- magnetisation: Recover magnetisation from field data.
- All operations use the lift height to set the correct spatial frequency transfer function.
