Magnetic Double Resonance in Force Microscopy

Abstract

Magnetic-resonance force microscopy is combined with cross-polarization and spin-decoupling NMR techniques to obtain double-resonance NMR signals of micrometer-scaled objects. The effective one-dimensional spatial resolution obtained in our experiments performed on a ${\mathrm{KPF}}_6$ single crystal sample is $\sim 0.5\mu \mathrm{m}$. The spectral linewidth of 900 Hz is sample limited. The described double-resonance techniques can introduce new chemical specificity to the magnetic-force sensor.