Quantitative magnetic information from reciprocal space maps in transmission electron microscopy

Abstract

One of the most challenging issues in the characterization of magnetic materials is to obtain quantitative analysis on the nanometer scale. Here we describe how electron magnetic circular dichroism (EMCD) measurements using the transmission electron microscope (TEM) can be used for that purpose, utilizing reciprocal space maps. Applying the EMCD sum rules, an orbital to spin moment ratio of $m_L/m_S=0.08\pm 0.01$ 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.

4 pages, 3 figures

References in corpus (4)

• First principles theory of chiral dichroism in electron microscopy applied to 3d ferromagnets
• Sum-rules for electron energy-loss near-edge spectra
• Experimental application of sum rules for electron energy loss magnetic chiral dichroism
• Magnetic circular dichroism in EELS: Towards 10 nm resolution

Cited by in corpus (8)

• Angular Momentum of Phonons and Einstein-de Haas Effect
• Is magnetic chiral dichroism feasible with electron vortices?
• Magnetic properties of single nanomagnets: EMCD on FePt nanoparticles
• Enabling atomic resolution in convergent beam EMCD measurements by the use of patterned apertures
• Convergent-Beam EMCD: Benefits, Pitfalls, and Applications
• Proposal for measuring magnetism with patterned apertures
• Quantitative analysis of magnetic spin and orbital moments from an oxidized iron (1 1 0) surface using electron magnetic circular dichroism
• Sub-10 nm Quantification of Spin and Orbital Magnetic Moment Across the Metamagnetic Phase Transition in FeRh Using EMCD