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...

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Autores principales:	Hasan Ali, Jan Rusz, Tobias Warnatz, Björgvin Hjörvarsson, Klaus Leifer
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cc0962a05b6040e78e8a11fc43ba27f8
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spelling	oai:doaj.org-article:cc0962a05b6040e78e8a11fc43ba27f82021-12-02T14:16:48ZSimultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope10.1038/s41598-021-81071-42045-2322https://doaj.org/article/cc0962a05b6040e78e8a11fc43ba27f82021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81071-4https://doaj.org/toc/2045-2322Abstract 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.Hasan AliJan RuszTobias WarnatzBjörgvin HjörvarssonKlaus LeiferNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hasan Ali Jan Rusz Tobias Warnatz Björgvin Hjörvarsson Klaus Leifer Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope
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.
format	article
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
title	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_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_sort	simultaneous mapping of emcd signals and crystal orientations in a transmission electron microscope
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/cc0962a05b6040e78e8a11fc43ba27f8
work_keys_str_mv	AT hasanali simultaneousmappingofemcdsignalsandcrystalorientationsinatransmissionelectronmicroscope AT janrusz simultaneousmappingofemcdsignalsandcrystalorientationsinatransmissionelectronmicroscope AT tobiaswarnatz simultaneousmappingofemcdsignalsandcrystalorientationsinatransmissionelectronmicroscope AT bjorgvinhjorvarsson simultaneousmappingofemcdsignalsandcrystalorientationsinatransmissionelectronmicroscope AT klausleifer simultaneousmappingofemcdsignalsandcrystalorientationsinatransmissionelectronmicroscope
_version_	1718391693338738688

Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope

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