Parallel mode differential phase contrast in transmission electron microscopy, I: theory and analysis

Paterson, G.W. , Macauley, G.M. , McVitie, S. and Togawa, Y. (2021) Parallel mode differential phase contrast in transmission electron microscopy, I: theory and analysis. Microscopy and Microanalysis, (Accepted for Publication)

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Publisher's URL: https://arxiv.org/abs/2104.06769

Abstract

In Part I of this diptych, we outline the parallel mode of differential phase contrast (TEM-DPC), which uses real-space distortion of Fresnel images arising from electrostatic or magnetostatic fields to quantify the phase gradient of samples with some degree of structural contrast. We present an analysis methodology and the associated software tools for the TEM-DPC method and, using them together with numerical simulations, compare the technique to the widely used method of phase recovery based on the transport-of-intensity equation (TIE), thereby highlighting the relative advantages and limitations of each. The TEM-DPC technique is particularly suitable for \textit{in-situ} studies of samples with significant structural contrast and, as such, complements the TIE method since structural contrast usually hinders the latter, but is an essential feature that enables the former. In Part II of this work, we apply the theory and methodology presented to the analysis of experimental data to gain insight into two-dimensional magnetic phase transitions.

Item Type:Articles
Status:Accepted for Publication
Refereed:Yes
Glasgow Author(s) Enlighten ID:Togawa, Dr Yoshihiko and Macauley, Mr Gavin and Paterson, Dr Gary and McVitie, Professor Stephen
Authors: Paterson, G.W., Macauley, G.M., McVitie, S., and Togawa, Y.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Microscopy and Microanalysis

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