Dresden 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 7: Poster Magnetism I

MA 7.77: Poster

Montag, 9. März 2026, 09:30–12:30, P2

Height Calibration of Nitrogen Vacancy Diamond Tips Using Current-Carrying Wires — Robin Abram, •Ricarda Reuter, Alexander Fernández Scarioni, Sibylle Sievers, and Hans Werner Schumacher — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

Scanning Nitrogen Vacancy Microscopy (SNVM) is a measurement technique capable of resolving the spatial distribution of magnetic stray fields with nanometer and microtesla resolution, respectively. It combines optical field detection with a scanning probe-like approach, where the key component is a diamond scanning tip containing a single NV center. While magnetic field measurements are quantum-calibrated with respect to the position of the NV center, precise knowledge of the distance to the sample is required to also consider the height dependence. The latter can currently only be estimated with an uncertainty of up to several nanometers, most commonly by calibration with a known stray field, e.g. using ferromagnetic microstructures. We established an improved height calibration based on SNVM studies of the current-induced Oersted field in Pt wires by Lee et al.. The out of plane field component is extracted from the raw data taken along the NV spin axis, following the approach first introduced by Schendel et al. and later applied to SNVM by Dovzhenko et al., and fitted to an analytical model. Using this approach, we realized a height calibration with an uncertainty of 10 nanometers for both 100 and 111 cut diamond tips. We also found that the nominally expected NV height underestimates the calibration result by about 30 nanometers.

Keywords: Nitrogen Vacancy Center / NV Center; Stray Field Detection; Height Calibration; Magnetic Field Decomposition; Scanning Nitrogen Vacancy Microscopy (SNVM)