Random Spin Signal in Magnetic Resonance Force Microscopy

Details Random Spin Signal in Magnetic Resonance Force Microscopy Random Spin Signal in Magnetic Resonance Force Microscopy

2003-06-11

arxiv.org/abs/cond-mat/0306292v1

Physics

Condensed Matter

15 pages

Scientific paper

We study a random magnetic resonance force microscopy (MRFM) signal caused by the thermal vibrations of high frequency cantilever modes in the oscillating cantilever-driven adiabatic reversals (OSCAR) technique. We show that the regular MRFM signal with a characteristic decay time, $\tau_m$, is followed by a non-dissipative random signal with a characteristic time $\tau_r$. We present the estimates for the values of $\tau_m$ and $\tau_r$. We argue that this random MRFM signal can be used for spin detection. It has a ``signature'' of a sharp peak in its Fourier spectrum.

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