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Simultaneous mappin...
Simultaneous mapping of EMCD signals and crystal orientations in a transmission electron microscope
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- Ali, Hasan, 1985- (författare)
- Uppsala universitet,Tillämpad materialvetenskap,Mirpur Univ Sci & Technol MUST, Dept Elect Engn, Mirpur 10250, Ajk, Pakistan.;Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden.,ELMiN
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- Rusz, Jan, 1979- (författare)
- Uppsala universitet,Materialteori
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- Warnatz, Tobias (författare)
- Uppsala universitet,Materialfysik
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- Hjörvarsson, Björgvin (författare)
- Uppsala universitet,Materialfysik
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- Leifer, Klaus, 1965- (författare)
- Uppsala universitet,Tillämpad materialvetenskap
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(creator_code:org_t)
- 2021-01-26
- 2021
- Engelska.
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Ingår i: Scientific Reports. - : Springer Nature. - 2045-2322. ; 11
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://www.nature.c...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
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