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(Invited) Linking magnetic properties to nanoscale spectral and spatial features
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Materials in Medicine)ORCID iD: 0000-0002-0999-3569
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Division of Energz Science, EcoTopia Science Institute, Nagoya University, Japan.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Electron Microscopy and Nanoengineering)
2015 (English)In: 79. Jahrestagung der DPG und DPG-Frühjahrstagung, 2015Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The fundamental questions posed by the field of nanomagnetism demand characterization techniques that are both quantitative and capable of resolving nanoscale features.  Electron Magnetic Circular Dichroism (EMCD) in the Transmission Electron Microscope (TEM) is a relatively young technique that promises to meet both of these criteria, and it has already demonstrated quantitative results with a spatial resolution superior to what can be achieved with x-rays.  An additional advantage of EMCD is that the scattering geometry in the TEM permits the acquisition of an EMCD signal in parallel to a multitude of additional properties, such as composition, valence, strain, and crystallographic structure.    In this talk, we describe an EMCD experimental design that enables these disparate property domains to be directly linked to magnetic behavior on the nanoscale.  This allows us to quantitatively map the magnetic spin to orbital ratio in real space and correlate it to nanoscale features such as interfaces and the presence of oxide.  We also present our progress into the spectral segregation of overlapping EMCD signals from similar materials using blind-source separation techniques.

Place, publisher, year, edition, pages
2015.
Keyword [en]
EMCD, Magnetism, Magnetite, TEM, EELS, XMCD, nanoscale
National Category
Condensed Matter Physics Nano Technology
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics; Engineering Science with specialization in Materials Analysis; Engineering Science with specialization in Nanotechnology and Functional Materials; Engineering Science with specialization in Materials Science
Identifiers
URN: urn:nbn:se:uu:diva-248019OAI: oai:DiVA.org:uu-248019DiVA: diva2:798267
Conference
79. Jahrestagung der DPG und DPG-Frühjahrstagung
Funder
The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), 1G2009-2017Göran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology
Available from: 2015-03-26 Created: 2015-03-26 Last updated: 2017-01-25

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Thersleff, ThomasRusz, JanLeifer, Klaus

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