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Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods
Measuring magnetic moments in ferromagnetic materials at atomic resolution is theoretically possible using the electron magnetic circular dichroism (EMCD) technique in a (scanning) transmission electron microscope ((S)TEM). However, experimental and data processing hurdles currently hamper the reali...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6890689/ https://www.ncbi.nlm.nih.gov/pubmed/31796786 http://dx.doi.org/10.1038/s41598-019-53373-1 |
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author | Thersleff, Thomas Schönström, Linus Tai, Cheuk-Wai Adam, Roman Bürgler, Daniel E. Schneider, Claus M. Muto, Shunsuke Rusz, Ján |
author_facet | Thersleff, Thomas Schönström, Linus Tai, Cheuk-Wai Adam, Roman Bürgler, Daniel E. Schneider, Claus M. Muto, Shunsuke Rusz, Ján |
author_sort | Thersleff, Thomas |
collection | PubMed |
description | Measuring magnetic moments in ferromagnetic materials at atomic resolution is theoretically possible using the electron magnetic circular dichroism (EMCD) technique in a (scanning) transmission electron microscope ((S)TEM). However, experimental and data processing hurdles currently hamper the realization of this goal. Experimentally, the sample must be tilted to a zone-axis orientation, yielding a complex distribution of magnetic scattering intensity, and the same sample region must be scanned multiple times with sub-atomic spatial registration necessary at each pass. Furthermore, the weak nature of the EMCD signal requires advanced data processing techniques to reliably detect and quantify the result. In this manuscript, we detail our experimental and data processing progress towards achieving single-pass zone-axis EMCD using a patterned aperture. First, we provide a comprehensive data acquisition and analysis strategy for this and other EMCD experiments that should scale down to atomic resolution experiments. Second, we demonstrate that, at low spatial resolution, promising EMCD candidate signals can be extracted, and that these are sensitive to both crystallographic orientation and momentum transfer. |
format | Online Article Text |
id | pubmed-6890689 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-68906892019-12-10 Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods Thersleff, Thomas Schönström, Linus Tai, Cheuk-Wai Adam, Roman Bürgler, Daniel E. Schneider, Claus M. Muto, Shunsuke Rusz, Ján Sci Rep Article Measuring magnetic moments in ferromagnetic materials at atomic resolution is theoretically possible using the electron magnetic circular dichroism (EMCD) technique in a (scanning) transmission electron microscope ((S)TEM). However, experimental and data processing hurdles currently hamper the realization of this goal. Experimentally, the sample must be tilted to a zone-axis orientation, yielding a complex distribution of magnetic scattering intensity, and the same sample region must be scanned multiple times with sub-atomic spatial registration necessary at each pass. Furthermore, the weak nature of the EMCD signal requires advanced data processing techniques to reliably detect and quantify the result. In this manuscript, we detail our experimental and data processing progress towards achieving single-pass zone-axis EMCD using a patterned aperture. First, we provide a comprehensive data acquisition and analysis strategy for this and other EMCD experiments that should scale down to atomic resolution experiments. Second, we demonstrate that, at low spatial resolution, promising EMCD candidate signals can be extracted, and that these are sensitive to both crystallographic orientation and momentum transfer. Nature Publishing Group UK 2019-12-03 /pmc/articles/PMC6890689/ /pubmed/31796786 http://dx.doi.org/10.1038/s41598-019-53373-1 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Thersleff, Thomas Schönström, Linus Tai, Cheuk-Wai Adam, Roman Bürgler, Daniel E. Schneider, Claus M. Muto, Shunsuke Rusz, Ján Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
title | Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
title_full | Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
title_fullStr | Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
title_full_unstemmed | Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
title_short | Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
title_sort | single-pass stem-emcd on a zone axis using a patterned aperture: progress in experimental and data treatment methods |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6890689/ https://www.ncbi.nlm.nih.gov/pubmed/31796786 http://dx.doi.org/10.1038/s41598-019-53373-1 |
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