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

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.

SUBMITTER: Hierro-Rodriguez A

PROVIDER: S-EPMC7736288 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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

Hierro-Rodriguez A A Quirós C C Sorrentino A A Alvarez-Prado L M LM Martín J I JI Alameda J M JM McVitie S S Pereiro E E Vélez M M Ferrer S S

Nature communications 20201214 1

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 ha ...[more]

PMID: 33318487

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