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, 27(5), pp. 1113-1122. (doi: 10.1017/S1431927621012551)
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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 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 |
|---|---|
| Additional Information: | The authors acknowledge support from the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom (Grant Number EP/M024423/1); Grants-in-Aid for Scientific Research on Innovative Areas “Quantum Liquid Crystals” (KAKENHI Grant No. JP19H05826) from JSPS of Japan; Grants-in-Aid for Scientific Research (KAKENHI Grant Nos. 17H02767 and 17H02923) from JSPS of Japan; and the Carnegie Trust for the Universities of Scotland. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | McVitie, Professor Stephen and Macauley, Mr Gavin and Paterson, Dr Gary and Togawa, Dr Yoshihiko |
| 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 |
| Publisher: | Cambridge University Press |
| ISSN: | 1431-9276 |
| ISSN (Online): | 1435-8115 |
| Published Online: | 20 September 2021 |
| Copyright Holders: | Copyright © 2021 The Authors |
| First Published: | First published in Microscopy and Microanalysis 27(5): 1113-1122 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Related URLs: | |
| Data DOI: | 10.5525/gla.researchdata.1172 |
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