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Lorentz Stem: A Digital Approach to an old

Published online by Cambridge University Press:  02 July 2020

Nestor J. Zaluzec
Nestor J. Zaluzec*
Affiliation:
Materials Science Div., Argonne National Lab, Argonne, IL, USA
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Abstract

The study of magnetic materials using electron column instruments has been a fruitful area of research for microscopists/microanalysts for nearly 4 decades. A number of techniques have been developed for both the SEM and TEM which enable visualization of magnetic fields ranging from Fresnel imaging (Fuller and Hale, Silcox), Differential Phase Contrast (Chapman), through to Electron Holography (Tonomura). The latter are generally qualitative, while the former quantitative, albeit at the price of significant complexity. The advent of microprocessor control of modern instruments, CCD detectors, and experimental diligence allows us to revisit and in fact revitalize this area of measurement.

The experimental work reported here is being carried out in the ANL AAEM HB603Z 300 kV FEG instrument. in this instrument, the electron optical column was operated in a zero field mode (figure 1), where the objective lens is turned off and the probe forming lens functions were reallocated to the C1, C2, and C3 lenses.

Type
Quantitative Stem: Imaging and Eels Analysis Honoring the Contributions of John Silcox (Organized by P. Batson, C. Chen and D. Muller)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 222 - 223
Copyright
Copyright © Microscopy Society of America 2001

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References

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8.)This work was supported in part by the U.S. DoE under BES-MS W-31-109-Eng-38 at ANL.Google Scholar