Исследование особенностей состава, магнитной и кристаллической структуры гексаферрита бария BaFe-=SUB=-12-x-=/SUB=-Ti-=SUB=-x-=/SUB=-O-=SUB=-19-=/SUB=-

Abstract

The results of studies of the composition, crystal, and magnetic structure of Ti-substituted barium hexaferrite BaFe12 - xTixO19 (0.25<x<1.5) by Mössbauer spectroscopy, vibration magnetometry, X-ray diffraction, and synchronous thermal analysis are presented. Partial substitution of Fe3 + ions by Ti4 + ions revealed the presence of a limited heterovalent isomorphism realized according to the 2Fe3+ = Ti4+ + Fe2+ while maintaining charge balance. Using Mössbauer spectroscopy, an increase in the electron density of 3d electrons and the presence of Fe2+ in BaFe12 - xTixO19 samples with x = 1.5 were established. The limit of heterovalent isomorphic substitution is established, which is in the range 0.75 <x <1.0. Using Mössbauer spectroscopy and X-ray diffraction, the formation of titanium-containing phases at x = 1, 0, the content of which increases with increasing degree of substitution, is shown. Information is provided on the predominant distribution of substituent ions (Ti4+) in the structure of barium hexaferrite at positions 12k and 2b.