Strontium hexaferrite platelets: a comprehensive soft X-ray absorption and Mössbauer spectroscopy study.

Author(s) Soria, G.D.; Jenus, P.; Marco, J.F.; Mandziak, A.; Sanchez-Arenillas, M.; Moutinho, F.; Prieto, J.E.; Prieto, P.; Cerdá, J.; Tejera-Centeno, C.; Gallego, S.; Foerster, M.; Aballe, L.; Valvidares, M.; Vasili, H.B.; Pereiro, E.; Quesada, A.; de la Figuera, J.
Journal Sci Rep
Date Published 2019 Aug 13
Abstract

Platelets of strontium hexaferrite (SrFeO, SFO), up to several micrometers in width, and tens of nanometers thick have been synthesized by a hydrothermal method. They have been studied by a combination of structural and magnetic techniques, with emphasis on Mössbauer spectroscopy and X-ray absorption based-measurements including spectroscopy and microscopy on the iron-L edges and the oxygen-K edge, allowing us to establish the differences and similarities between our synthesized nanostructures and commercial powders. The Mössbauer spectra reveal a greater contribution of iron tetrahedral sites in platelets in comparison to pure bulk material. For reference, high-resolution absorption and dichroic spectra have also been measured both from the platelets and from pure bulk material. The O-K edge has been reproduced by density functional theory calculations. Out-of-plane domains were observed with 180° domain walls less than 20 nm width, in good agreement with micromagnetic simulations.

DOI 10.1038/s41598-019-48010-w
ISSN 2045-2322
Citation Soria GD, Jenus P, Marco JF, Mandziak A, Sanchez-Arenillas M, Moutinho F, et al. Strontium hexaferrite platelets: a comprehensive soft X-ray absorption and Mössbauer spectroscopy study. Sci Rep. 2019;9(1):11777.

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