Revealing 3D magnetization of thin films with soft X-ray tomography: magnetic singularities and topological charges

A. Hierro-Rodriguez (), C. Quirós, A. Sorrentino, L. M. Alvarez-Prado, J. I. Martín, J. M. Alameda, S. McVitie, E. Pereiro, M. Vélez () and S. Ferrer ()
Additional contact information
A. Hierro-Rodriguez: SUPA, School of Physics and Astronomy, University of Glasgow
C. Quirós: Depto. Física, Universidad de Oviedo
A. Sorrentino: ALBA Synchrotron
L. M. Alvarez-Prado: Depto. Física, Universidad de Oviedo
J. I. Martín: Depto. Física, Universidad de Oviedo
J. M. Alameda: Depto. Física, Universidad de Oviedo
S. McVitie: SUPA, School of Physics and Astronomy, University of Glasgow
E. Pereiro: ALBA Synchrotron
M. Vélez: Depto. Física, Universidad de Oviedo
S. Ferrer: ALBA Synchrotron

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract The knowledge of how magnetization looks inside a ferromagnet is often hindered by the limitations of the available experimental methods which are sensitive only to the surface regions or limited in spatial resolution. Here we report a vector tomographic reconstruction based on soft X-ray transmission microscopy and magnetic dichroism data, which has allowed visualizing the three-dimensional magnetization in a ferromagnetic thin film heterostructure. Different non-trivial topological textures have been resolved and the determination of their topological charge has allowed us to identify a Bloch point and a meron-like texture. Our method relies only on experimental data and might be of wide application and interest in 3D nanomagnetism.

Date: 2020
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DOI: 10.1038/s41467-020-20119-x

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