Convergent-Beam EMCD: Benefits, Pitfalls, and Applications
arXiv:1707.01579 · doi:10.1093/jmicro/dfx129
Abstract
Energy-loss magnetic chiral dichroism (EMCD) is a versatile method for studying magnetic properties on the nanoscale. However, the classical EMCD technique is notorious for its low signal to noise ratio (SNR). Here, we study the theoretical possibilities of using a convergent beam for EMCD. In particular, we study the influence of detector positioning as well as convergence and collection angles on the detectable EMCD signal. In addition, we analyze the expected SNR and give guidelines for achieving optimal EMCD results.
References in corpus (13)
- Atomic scale electron vortices for nanoresearch
- First principles theory of chiral dichroism in electron microscopy applied to 3d ferromagnets
- Sum-rules for electron energy-loss near-edge spectra
- Is magnetic chiral dichroism feasible with electron vortices?
- Boundaries for efficient use of electron vortex beams to measure magnetic properties
- Quantitative magnetic information from reciprocal space maps in transmission electron microscopy
- Achieving atomic resolution magnetic dichroism by controlling the phase symmetry of an electron probe
- Magnetic circular dichroism in EELS: Towards 10 nm resolution
- Scattering of electron vortex beams on a magnetic crystal: towards atomic resolution magnetic measurements
- Mapping spin-polarised transitions with atomic resolution
- A pure state decomposition approach of the mixed dynamic form factor for mapping atomic orbitals
- Electron vortices in crystals
- Transition probability functions for inelastic electron--electron scattering