Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope
Abstract When magnetic properties are analysed in a transmission electron microscope using the technique of electron magnetic circular dichroism (EMCD), one of the critical parameters is the sample orientation. Since small orientation changes can have a strong impact on the measurement of the EMCD s...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-81071-4 |
| _version_ | 1818570852825825280 |
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| author | Hasan Ali Jan Rusz Tobias Warnatz Björgvin Hjörvarsson Klaus Leifer |
| author_facet | Hasan Ali Jan Rusz Tobias Warnatz Björgvin Hjörvarsson Klaus Leifer |
| author_sort | Hasan Ali |
| collection | DOAJ |
| description | Abstract When magnetic properties are analysed in a transmission electron microscope using the technique of electron magnetic circular dichroism (EMCD), one of the critical parameters is the sample orientation. Since small orientation changes can have a strong impact on the measurement of the EMCD signal and such measurements need two separate measurements of conjugate EELS spectra, it is experimentally non-trivial to measure the EMCD signal as a function of sample orientation. Here, we have developed a methodology to simultaneously map the quantitative EMCD signals and the local orientation of the crystal. We analyse, both experimentally and by simulations, how the measured magnetic signals evolve with a change in the crystal tilt. Based on this analysis, we establish an accurate relationship between the crystal orientations and the EMCD signals. Our results demonstrate that a small variation in crystal tilt can significantly alter the strength of the EMCD signal. From an optimisation of the crystal orientation, we obtain quantitative EMCD measurements. |
| first_indexed | 2024-12-14T13:47:24Z |
| format | Article |
| id | doaj.art-cc0962a05b6040e78e8a11fc43ba27f8 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-14T13:47:24Z |
| publishDate | 2021-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-cc0962a05b6040e78e8a11fc43ba27f82022-12-21T22:59:15ZengNature PortfolioScientific Reports2045-23222021-01-0111111010.1038/s41598-021-81071-4Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscopeHasan Ali0Jan Rusz1Tobias Warnatz2Björgvin Hjörvarsson3Klaus Leifer4Applied Materials Science, Department of Materials Science and Engineering, Uppsala UniversityDepartment of Physics and Astronomy, Uppsala UniversityDepartment of Physics and Astronomy, Uppsala UniversityDepartment of Physics and Astronomy, Uppsala UniversityApplied Materials Science, Department of Materials Science and Engineering, Uppsala UniversityAbstract When magnetic properties are analysed in a transmission electron microscope using the technique of electron magnetic circular dichroism (EMCD), one of the critical parameters is the sample orientation. Since small orientation changes can have a strong impact on the measurement of the EMCD signal and such measurements need two separate measurements of conjugate EELS spectra, it is experimentally non-trivial to measure the EMCD signal as a function of sample orientation. Here, we have developed a methodology to simultaneously map the quantitative EMCD signals and the local orientation of the crystal. We analyse, both experimentally and by simulations, how the measured magnetic signals evolve with a change in the crystal tilt. Based on this analysis, we establish an accurate relationship between the crystal orientations and the EMCD signals. Our results demonstrate that a small variation in crystal tilt can significantly alter the strength of the EMCD signal. From an optimisation of the crystal orientation, we obtain quantitative EMCD measurements.https://doi.org/10.1038/s41598-021-81071-4 |
| spellingShingle | Hasan Ali Jan Rusz Tobias Warnatz Björgvin Hjörvarsson Klaus Leifer Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope Scientific Reports |
| title | Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope |
| title_full | Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope |
| title_fullStr | Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope |
| title_full_unstemmed | Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope |
| title_short | Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope |
| title_sort | simultaneous mapping of emcd signals and crystal orientations in a transmission electron microscope |
| url | https://doi.org/10.1038/s41598-021-81071-4 |
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