Spatial resolution in atom probe tomography.

Journal article

This article addresses gaps in definitions and a lack of standard measurement techniques to assess the spatial resolution in atom probe tomography. This resolution is known to be anisotropic, being better in-depth than laterally. Generally the presence of atomic planes in the tomographic reconstruction is considered as being a sufficient proof of the quality of the spatial resolution of the instrument. Based on advanced spatial distribution maps, an analysis methodology that interrogates the local neighborhood of the atoms within the tomographic reconstruction, it is shown how both the in-depth and the lateral resolution can be quantified. The influences of the crystallography and the temperature are investigated, and models are proposed to explain the observed results. We demonstrate that the absolute value of resolution is specimen specific.

Authors: Gault, B; Moody, M; De Geuser, F; La Fontaine, A; Stephenson, LT

• Publication status: Published
• Journal: Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
• Volume: 16
• Issue: 1
• Pages: 99-110
• Publication date: 2010-02-01
• DOI: 10.1017/s1431927609991267
• EISSN: 1435-8115
• ISSN: 1431-9276
• Language: English
• Keywords: spatial distribution maps; trajectory aberration; resolution; atom probe tomography; tomographic reconstruction