Thermal History Dependent Al Distribution in Aluminum Substituted Strontium Hexaferrite

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ID: 117159
2020
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Abstract
Single crystals of aluminum substituted strontium hexaferrite SrFe12–xAlxO19 were grown from sodium oxide based flux. The substitution level aimed for was x = 1.2. Annealing experiments performed on single crystals show that the Al distribution on the five iron sites of the hexaferrite structure depends on the annealing time at 900 °C. Single crystal X-ray diffractometry shows that annealing a crystal after the initial synthesis has an impact on the Al content on the octahedrally and tetrahedrally coordinated sites. Furthermore, it was found that heating in a corundum crucible increases the overall Al content. Magnetic measurements show that annealing in a platinum or corundum crucible decreases coercivity and remanence while the saturation magnetization is hardly influenced.
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häßner2020materialsthermal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Manuel Häßner;Denis A. Vinnik;Rainer Niewa;Häßner, Manuel;Vinnik, Denis A.;Niewa, Rainer;
Journal Materials (Basel, Switzerland)
Year 2020
DOI
10.3390/ma13040858
URL
https://www.mdpi.com/1996-1944/13/4/858
Keywords
cation distribution aluminum substituted hexaferrite magnetic materials

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