To study fluctuating two-level spin systems, which limit performance of nanodevices, MRFM (magnetic resonance force microscopy) is a technique with a high potential. MRFM detects spins by measuring...Show moreTo study fluctuating two-level spin systems, which limit performance of nanodevices, MRFM (magnetic resonance force microscopy) is a technique with a high potential. MRFM detects spins by measuring their coupling to a micrometer sized magnet at the tip of a soft cantilever, leading to a shift in resonance frequency and quality factor. In this thesis, we present easyMRFM, a probe-head design for a SQUID-detected MRFM, operating at cryogenic temperatures. We determine a coupling-free resonance frequency of f0 = 393.42134 Hz ± 0.06 mHz and a quality factor of Q = (3.50 ± 0.03) · 104, and determined the temperature dependence thereof. An experiment is proposed and set up to detect the temperature dependent shift in these parameters, induced by spin-magnet coupling to a copper sample, thus realising easyMFM (magnetic force microscopy). A lower and upper limit for the coupling of cantilever deflection to measured signal are experimentally determined at 0.022 mV/μm < dVsignal dx < 0.486 mV/μm.Show less
