Quantitative magnetic information from reciprocal space maps in transmission electron microscopy.
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.
Lidbaum
Hans
H
Department of Engineering Sciences, Uppsala University, Box 534, S-751 21 Uppsala, Sweden.
Rusz
Ján
J
Liebig
Andreas
A
Hjörvarsson
Björgvin
B
Oppeneer
Peter M
PM
Coronel
Ernesto
E
Eriksson
Olle
O
Leifer
Klaus
K