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Modeling MFM images of periodic magnetization patterns (abstract)

Magnetic force microscopy (MFM) is a powerful technique that has gained wide acceptance in the imaging of magnetization patterns. However, MFM images are ‘‘raw’’ images, and they are not necessarily identical to the original images of the magnetization patterns. In an attempt to investigate the relationship between the raw images and the magnetization patterns, we present a theoretical analysis of the MFM images through numerical computations. In this way, we show the dependence of the images on both the orientation of the probe’s magnetic moment and the interaction between the probe moment and the sample magnetic fields. For a pure sinusoidal magnetization pattern, a vertical orientation of the MFM probe’s magnetic moment will yield images that follow the magnetic charge density distribution, while a horizontal orientation of the probe will yield MFM images that follow the magnetization patterns themselves. We investigate the deviation from this correlation between the images and the magnetization distri...