Microscale Localized Spectroscopy with a Magnetic Resonance Force Microscope

Abstract

Magnetic resonance force microscopy is combined with spin-echo spectroscopy to obtain spatially and spectrally resolved NMR signals of micrometer-scale objects. The experimental spatial resolution for the demonstration experiment on a sample consisting of $\mathrm{Ba}({\mathrm{ClO}}_3{)}_2·{\mathrm{H}}_2\mathrm{O}$ and $({\mathrm{NH}}_4{)}_2{\mathrm{SO}}_4$ single crystals is $3.4\mu \mathrm{m}$. The spectral resolution of 3.4 kHz is sample limited. Improvements in resolution and extensions of the method to more than one spatial dimension and to multidimensional spectroscopy are possible.