Sensitive magnetic resonance force imaging of low-γ nuclei

A sensitive magnetic double-resonance method for magnetic resonance force microscopy is presented. Rare nuclei with low gyromagnetic ratio are imaged with enhanced sensitivity via abundant high-gamma spins using a frequency-swept cross-depolarization technique. One-dimensional experimental images with micrometer resolution are presented, and application as a contrast method for magnetic resonance force microscopy imaging of high-gamma spins is described.