Fig. 3: Reconstructed atom map and resolution assessment for APT.

a, APT atom map from the AN500 sample, calibrated at the (111) pole; the inset confirms sufficient resolution to visually discern the {111} planes. b–e, Determination of in-depth resolution parameters. b, Two-dimensional density map from the CoCrNi MEA (AN500 condition) experimental APT reconstruction across the x–y plane—a (111) pole is observed. The diagram below shows the annular regions of interest in red, green and blue from which the in-depth spatial resolution was measured in the corresponding reconstruction. Panels c–e show the SDMs for the three regions at different distances from the (111) pole shown in b.