Circular dichroism in the electron microscope: Progress and applications (invited)
- Institute of Solid State Physics, Vienna University of Technology, A-1040 Vienna (Austria)
- Service Centre for Electron Microscopy, Vienna University of Technology, A-1040 Vienna (Austria)
- EMAT, University of Antwerp, B-2020 Antwerp (Belgium)
According to theory, x-ray magnetic circular dichroism in a synchrotron is equivalent to energy loss magnetic chiral dichroism (EMCD) in a transmission electron microscope (TEM). After a synopsis of the development of EMCD, the theoretical background is reviewed and recent results are presented, focusing on the study of magnetic nanoparticles for ferrofluids and Heusler alloys for spintronic devices. Simulated maps of the dichroic strength as a function of atom position in the crystal allow evaluating the influence of specimen thickness and sample tilt on the experimental EMCD signal. Finally, the possibility of direct observation of chiral electronic transitions with atomic resolution in a TEM is discussed.
- OSTI ID:
- 21476217
- Journal Information:
- Journal of Applied Physics, Vol. 107, Issue 9; Conference: 11. joint MMM-Intermag conference, Washington, DC (United States), 18-22 Jan 2010; Other Information: DOI: 10.1063/1.3365517; (c) 2010 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COMPUTERIZED SIMULATION
CRYSTALS
ENERGY LOSSES
HEUSLER ALLOYS
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MATERIALS
NANOSTRUCTURES
PARTICLES
RESOLUTION
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
ALUMINIUM ALLOYS
COPPER ALLOYS
COPPER BASE ALLOYS
CORROSION RESISTANT ALLOYS
DICHROISM
ELECTRON MICROSCOPY
LOSSES
MANGANESE ALLOYS
MATERIALS
MICROSCOPY
SIMULATION
TRANSITION ELEMENT ALLOYS