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Published on: June 23, 2023
A method for estimating magnetic field of TEM objective lens
D A Tatarskiy1, N S Gusev1, S A Gusev2
1Institute for Physics of Microstructures RAS, Department of Magnetic Nanostructures, Afonino, Akademicheskaya st.7, Nizhny Novgorod, 603087, Russia; Lobachevsky State University of Nizhny Novgorod, Gagarina ave. 23, Nizhny Novgorod, 603950, Russia.
Abstract:
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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