Size controlled growth of barium hexaferrite platelets using salt assisted sol-gel technique

Joseph, Navya; Kaipamangalath, Aswathy; Varma, Manoj Raama; Thomas, Sabu

doi:10.1016/j.matchemphys.2021.124971

Cited by 6 publications

(1 citation statement)

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“…The citrate method is the most universal and involves the preparation of a gel containing evenly distributed metal ions, which is then dried and combusted [8][9][10][11]. Another wellknown method is hydrothermal synthesis, which is carried out in autoclaves at high pressures, wherein an aqueous solution of metal salts is hydrolyzed.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Terahertz–Infrared Properties of Nanodispersed Hexaferrite SrxBa(1−x)Fe12O19 Solid Solutions

Kovalev,

Vinnik,

Gudkova

et al. 2023

Crystals

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Hexagonal ferrites with the formula SrxBa(1−x)Fe12O19 (x = 0; 0.3; 0.5; 0.7; and 1) were prepared using the citrate method. The main feature of this synthesis is a relatively low calcination temperature of 700 °C. An X-ray diffraction study revealed a single-phase material. According to SEM, the particles were 50−70 nm in diameter. The Curie temperature of the samples that were determined using the DSC method varied in a very narrow range of 455−459 °C. Analysis of the magnetic hysteresis loops obtained at 300 K and 50 K indicated all samples as magnetically hard materials in a single-domain state. The maximal magnetic characteristics encompass strontium hexaferrite. The terahertz spectra of complex dielectric permittivity and the spectra of infrared reflectivity were measured at room temperature in the range of 6–7000 cm−1. The obtained broad-band spectra of the real and imaginary parts of permittivity reveal significant changes associated with structural distortions of the (Sr,Ba)O12 anti-cuboctahedron caused by the substitution of Ba2+ with Sr2+ in the same crystallographic positions.

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Section: Introductionmentioning

confidence: 99%