Strontium hexaferrite platelets: a comprehensive soft X-ray absorption and Mössbauer spectroscopy study
Year: 2019
Type: article
Abstract: , 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.
Source: Scientific Reports
Institutions: Consejo Superior de Investigaciones Científicas, Instituto de Química Física Blas Cabrera, Jožef Stefan Institute, Jožef Stefan International Postgraduate School, ALBA Synchrotron (Spain), Universidad Autónoma de Madrid, Instituto de Ciencia de Materiales de Madrid, Instituto de Cerámica y Vidrio
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,790
Awards: G3198636493, G3926624877, G4110489319, G4144702444, Ceramics and complementary materials for advanced engineering and biomedical applications, G4937468798, G531247268, G6348767563, G6768127000, G7626893918, G7768514744, G8521521446, Anisometric permanent hybrid magnets based on inexpensive and non-critical materials
OpenAlex ID: W2968314752