You are here: Experiment Guide > Imaging Modes > Interleave Scanning and LiftMode > MFM Amplitude Detection

Amplitude Detection

Set the controls as follows:
- Channel 3 Image Data Type: Amplitude
- Z range: 1 nm
- Line direction: Retrace.
Change Interleave Mode to Lift to invoke LiftMode.
Set the Channel 3 Scan Line to Interleave to display the interleaved data.

NOTE: This can only be done after Interleave mode is enabled. A magnetic force gradient image similar to that shown on the right of figure 1 (below) should appear as the Channel 3 image. The alternating dark and light stripes represent the recorded magnetic information, signifying a varying resonant frequency and magnetic force gradient on the tip.

Figure 1: Topographic (left) and Magnetic Force Gradient (right) AFM images of metal-evaporated video tape.

HINT: Keep the Setpoint as large as possible while maintaining image quality. Wider scans (> 25 µm) will reveal separate tracks in which the magnetic stripes are at different angles.

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