NMR Force Microscopy on Co/Cu interface

We present our recent NMR Force Microscopy experiments, where we demonstrate the first detection of 63Cu and 65Cu NMR using Magnetic Resonance Force Microscopy (MRFM). The signals were detected at T = 5 K using a commercial Si3N4 cantilever with a spherical NdFeB probe magnet. We demonstrate MRFM detection sensitivity of 1.0e5 nuclear spins. We report measurements of the relaxation time, signal lifetime, and the results of nutation experiments. We also discuss the application of NMRFM for spatially resolved mapping of the local hyperfine field variation in the vicinity of a buried Co/Cu interface arising from the RKKY interaction.