Structural and Magnetic Properties of Nanosized Barium Hexaferrite Powders Obtained by Microemulsion Technique

Abstract:

Thin hexagonal barium hexaferrite particles synthesized using the microemulsion technique were studied. A water-in-oil reverse microemulsion system with cetyltrimethylammonium bromide (CTAB) as a cationic surfactant, n-butanol as a co-surfactant, n-hexanol as a continuous oil phase, and an aqueous phase were used. The microstructural and magnetic properties were investigated. The particles obtained were mono-domain with average particle size 280 nm. The magnetic properties of the powder were investigated at 4.2 K and at room temperature. The saturation magnetization was 48.86 emu/g and the coercivity, 2.4 x 105 A/m at room temperature. The anisotropy field Ha and magneto-crystalline anisotropy K1 were 1.4 x 106 A/m and 2.37 x 105 J/m3, respectively.

• Periodical: Solid State Phenomena (Volume 159)
• Pages: 57-62
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.159.57
• Online since: January 2010
• Authors: Tatyana Koutzarova, Svetoslav Kolev, Kornely Grigoriev Grigorov, Chavdar Ghelev, Andrzej Zaleski, Robert E. Vandenberghe, Marcel Ausloos, Catherine Henrist, Rudi Cloots, Ivan Nedkov
• Keywords: Barium Hexaferrite, Magnetic Property, Microemulsion Process, Moesbauer Spectroscopy

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