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A nominally nonmagnetic Si cantilever (Ref. 13). Quality factor plotted as a function of magnetic field pointing perpendicular (i) and parallel (ii) to the lever’s angular rotation vector.
(a) Experimental apparatus. Current flows in the microwire (red) along while the lever displacement is along . Inset (b) shows an SEM image of a Si cantilever with a polystyrene sample, and (c) shows a SEM of a microwire rf source with an integrated FeCo tip.
spin signal in a polystyrene sample as a function of rf carrier frequency. Points are experimental data while solid lines are simulations. The insets depict the positions of the sample (colored circles) for each resonance curve relative to the FeCo tip (magnetized along the white arrow). The dashed lines mark the resonance frequencies of spins at .
Cross section through the center of the FeCo tip with resonant slices in the xz-plane (surfaces of constant ). White arrow shows the magnetization direction of FeCo.
Spin nutation at . Force signal is measured as a function of pulse length. A of 12 mT is extracted from a decaying sinusoidal fit of the Rabi oscillations shown in red.
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