Quantitative characterization of nanoscale polycrystalline magnets with electron magnetic circular dichroism

Shunsuke Muto (), Ján Rusz, Kazuyoshi Tatsumi, Roman Adam, Shigeo Arai, Vancho Kocevski, Peter M. Oppeneer, Daniel E. Bürgler and Claus M. Schneider
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Shunsuke Muto: EcoTopia Science Institute, Nagoya University, Chikusa-ku
Ján Rusz: Uppsala University, Box 516, Uppsala S-75120, Sweden
Kazuyoshi Tatsumi: EcoTopia Science Institute, Nagoya University, Chikusa-ku
Roman Adam: Peter Grünberg Institut, Forschungszentrum Jülich GmbH
Shigeo Arai: EcoTopia Science Institute, Nagoya University, Chikusa-ku
Vancho Kocevski: Uppsala University, Box 516, Uppsala S-75120, Sweden
Peter M. Oppeneer: Uppsala University, Box 516, Uppsala S-75120, Sweden
Daniel E. Bürgler: Peter Grünberg Institut, Forschungszentrum Jülich GmbH
Claus M. Schneider: Peter Grünberg Institut, Forschungszentrum Jülich GmbH

Nature Communications, 2014, vol. 5, issue 1, 1-7

Abstract: Abstract Electron magnetic circular dichroism (EMCD) allows the quantitative, element-selective determination of spin and orbital magnetic moments, similar to its well-established X-ray counterpart, X-ray magnetic circular dichroism (XMCD). As an advantage over XMCD, EMCD measurements are made using transmission electron microscopes, which are routinely operated at sub-nanometre resolution, thereby potentially allowing nanometre magnetic characterization. However, because of the low intensity of the EMCD signal, it has not yet been possible to obtain quantitative information from EMCD signals at the nanoscale. Here we demonstrate a new approach to EMCD measurements that considerably enhances the outreach of the technique. The statistical analysis introduced here yields robust quantitative EMCD signals. Moreover, we demonstrate that quantitative magnetic information can be routinely obtained using electron beams of only a few nanometres in diameter without imposing any restriction regarding the crystalline order of the specimen.

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4138

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DOI: 10.1038/ncomms4138

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