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http://dx.doi.org/10.4150/KPMI.2009.16.6.410

A Study on Magnetic Properties of BaFe12O_19 Fabricated by Self-assembly Method  

Choi, Moon-Hee (School of Materials Science and Engineering, Pusan National University)
Yu, Ji-Hun (Powder Technology Group, Korea Institute of Materials Science)
Kim, Dong-Hwan (Powder Technology Group, Korea Institute of Materials Science)
Lee, Hye-Mum (Powder Technology Group, Korea Institute of Materials Science)
Kim, Su-Min (School of Materials Science and Engineering, Pusan National University)
Kim, Yang-Do (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of Powder Materials / v.16, no.6, 2009 , pp. 410-415 More about this Journal
Abstract
Hexagonal barium ferrite ($BaFe_{12}O_{19}$) nano-particles have been successfully synthesised using selfassembly method. Diethyleneamine (DEA) surfactant was used to fabricate the micelle structure of Ba-DEA complex under various DEA concentrations. $BaFe_{12}O_{19}$ powders were synthesized with addition Fe ions to Ba-DEA complex and then heat treated at temperature range of 800-1000${\circ}C$. The molar ratio of Ba/DEA and heat-treatment temperature significantly affected the magnetic properties and morphology of $BaFe_{12}O_{19}$ powders. $BaFe_{12}O_{19}$ powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at 1000${\circ}C$ for 1 hour showed the coercive forces (iHc) of 4.84 kOe with average crystal size of about 200 nm.
Keywords
$BaFe_{12}O_{19}$; Self-assembly method; DEA;
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