Solid-state STRAFI NMR probe for material imaging of quadrupolar nuclei

► Broadband STRAFI probe sweeps large frequency range for materials imaging. ► Step-size, excitation bandwidth and pulse shape all influence the 1D profile. ► With 7Li STRAFI experiments, able to achieve 15 μm resolution in a 72 T/m gradient. ► Resolved images of <100 μm thick materials is easily attained and show fine details.