A new method for obtaining the magnetic shape anisotropy directly from electron tomography images

Cristian Radu; Ioana D Vlaicu; Andrei C Kuncser

doi:10.3762/bjnano.13.51

A new method for obtaining the magnetic shape anisotropy directly from electron tomography images

Beilstein J Nanotechnol. 2022 Jul 5:13:590-598. doi: 10.3762/bjnano.13.51. eCollection 2022.

Authors

Cristian Radu^{1

2}, Ioana D Vlaicu¹, Andrei C Kuncser¹

Affiliations

¹ National Institute of Materials Physics, Magurele, Romania.
² Faculty of Physics, University of Bucharest, Bucharest, Romania.

Abstract

A new methodology to obtain magnetic information on magnetic nanoparticle (MNP) systems via electron tomography techniques is reported in this work. The new methodology is implemented in an under-development software package called Magn3t, written in Python and C++. A novel image-filtering technique that reduces the highly undesired diffraction effects in the tomography tilt-series has been also developed in order to increase the reliability of the correlations between morphology and magnetism. Using the Magn3t software, the magnetic shape anisotropy magnitude and direction of magnetite nanoparticles has been extracted for the first time directly from transmission electron tomography.

Keywords: Python; electron tomography; magnetite; shape anisotropy.

Grants and funding

The authors acknowledge the financial support of the Romanian Ministry of Research and Innovation through the Core Program PN030101-21N/2019 and project PN-III-P1-1.1-TE-2021-0273, contract TE 86/2022.