A method for estimating magnetic field of TEM objective lens.

Ultramicroscopy

Institute for Physics of Microstructures RAS, Department of Magnetic Nanostructures, Afonino, Akademicheskaya st.7, Nizhny Novgorod, 603087, Russia.

Published: November 2023

We propose a method for calibration of magnetic field in the objective lens of transmission electron microscope. The calibration process is based on classical Fresnel imaging of Permalloy disks and measuring the displacement of the magnetic vortex core when the sample is tilted at various excitations of the objective lens. We adopted the Carl Zeiss LIBRA 200 MC transmission electron microscope for Lorentz electron microscopy using this method. The objective lens magnetic field evaluation is tested on the Co/Pt multilayered films with known magnetic properties.

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Source
http://dx.doi.org/10.1016/j.ultramic.2023.113822DOI Listing

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