Rotation of electron beams in the presence of localised, longitudinal magnetic fields
- 1. EMAT, University of Antwerp
- 2. University of Glasgow School of Physics and Astronomy, Glasgow, United Kingdom
Description
Electron Bessel beams have been generated by inserting an annular aperture in the illumination system of a TEM.
These beams have passed through a localised magnetic field.
As a result a low amount of image rotation (which is expected to be proportional to the longitudinal component of the magnetic field) is observed in the far field.
A measure of this rotation should give access to the magneti field.
The two datasets have been acquired in a FEI Titan3 microscope, operated at 300kV.
The file focal_series.tif contains a series of images acquired varying the magnetic field through the objective lens.
The file line_profile.ser contains a series of images acquired by scanning the beam over a sample with several magnetised nanopillars.
For reference, check the associated publication:
Giulio Guzzinati, Armand Béché, Damien McGrouther and Jo Verbeeck, Prospects for out-of-plane magnetic field measurements through interference of electron vortex modes in the TEM, Journal of Optics 21 124002 (2019)
Files
focal_series.tif
Files
(1.7 GB)
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Additional details
Related works
- Is documented by
- Journal article: 10.1088/2040-8986/ab51fc (DOI)
References
- Giulio Guzzinati et al 2019 J. Opt. 21 124002