Scanning nonlinear magnetic microscopy (SNMM) is introduced as a new microscopic techniquefor measurement of the distribution of magnetization. The technique is based on the detection of inductance variation in a magnetic material under application of an external alternating magnetic field. The measured inductance thus reflects the nonlinear magnetic response of the material, giving the nonlinear magnetic permeability ((mu)_(333)) and the direction and magnitude of magnetization. SNMM is demonstrated in application to measurement of the magnetization distribution of a floppy disk.
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