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(Color online) (a) Experimental setup comprising a FeCoSiB-coated tipless cantilever placed in a commercial AFM unit. The oscillation is read out via the LASER deflection method. (b) SEM image of tipless Si-cantilever coated with 500 nm FeCoSiB.
rms of the modulation of the oscillation amplitude with respect to an AC magnetic field (). Inset: modulated amplitude of the cantilever oscillation without external field and with , respectively. A biasing magnetic DC-field is applied during the measurement.
Fourier transforms of the modulated amplitude with magnetic test fields of and .
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