Minimizing Sensor-Sample Distances in Scanning Nitrogen-Vacancy Magnetometry.

ABSTRACT: Scanning magnetometry with nitrogen-vacancy (NV) centers in diamond has led to significant advances in the sensitive imaging of magnetic systems. The spatial resolution of the technique, however, remains limited to tens to hundreds of nanometers, even for probes where NV centers are engineered within 10 nm from the tip apex. Here, we present a correlated investigation of the crucial parameters that determine the spatial resolution: the mechanical and magnetic stand-off distances, as well as the subsurface NV center depth in diamond. We study their contributions using mechanical approach curves, photoluminescence measurements, magnetometry scans, and nuclear magnetic resonance (NMR) spectroscopy of surface adsorbates. We first show that the stand-off distance is mainly limited by features o

SUBMITTER: Xu Z 

PROVIDER: S-EPMC11887488 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature