Quantitative magnetic information from reciprocal space maps in Transmission Electron Microscopy

0340584 - FZÚ 2010 RIV US eng J - Journal Article
Lidbaum, H. - Rusz, Ján - Liebig, A. - Hjörvarsson, B. - Oppeneer, P.M. - Coronel, E. - Eriksson, O. - Leifer, K.
Quantitative magnetic information from reciprocal space maps in Transmission Electron Microscopy.
Physical Review Letters. Roč. 102, č. 3 (2009), 037201/1-037201/4. ISSN 0031-9007. E-ISSN 1079-7114
Institutional research plan: CEZ:AV0Z10100520
Keywords : transmission electron microscope * dichroism * sum rules * magnetic moment * EMCD * ELNES
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 7.328, year: 2009
http://prl.aps.org/abstract/PRL/v102/i3/e037201

One of the most challenging issues in the characterization of magnetic materials is to obtain a quantitative analysis on the nanometer scale. Here we describe how electron magnetic circular dichroism (EMCD) measurements using the transmission electron microscope can be used for that purpose, utilizing reciprocal space maps. Applying the EMCD sum rules, an orbital to spin moment ratio of mL/mS=0.08±0.01 is obtained for Fe, which is consistent with the commonly accepted value. Hence, we establish EMCD as a quantitative element-specific technique for magnetic studies, using a widely available instrument with superior spatial resolution.
Permanent Link: http://hdl.handle.net/11104/0183796