Optimising multi-frame ADF-STEM for high-precision atomic-resolution strain mapping
Ultramicroscopy(2017)
摘要
•ADF-STEM strain-measurement precision is limited by scanning distortions.•Multi-frame imaging and non-rigid registration can correct scanning-distortions.•Experiment design was tuned for maximum strain precision using a fixed total dose.•Optimised approach was used to study strain fields around aluminium precipitates.•Measured strain fields agree favourably with DFT simulation and HRTEM measurement.
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关键词
ADF-STEM,Experiment design,Strain in crystals/solids,Aluminium alloys,Density functional calculations
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