Enhancement of magnetic and microwave absorbing properties of [ba (fe, mn, ti)12 o19]1-x-[cofe12 o4] x (x = 0.2; 0.5; 0.8) composites

L. Darmawan, Suparno, A. Manaf

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In this paper, we report magnetic and microwave absorbing properties of magnetic based nanocomposite, which synthesized through mechanically alloyed the magnetic crystalline powders. The first component of composite was Mn-Ti doped Barium hexaferrite(BaFe12O19) or BHF obtained through a mechanical alloying process which was mixed with the second component of mechanically alloyed the CoFe2O4magnetic compound to form composites of [Ba (Fe, Mn, Ti)12O19]1-x-[CoFe2O4]x (x = 0.2; 0.5; 0.8) compositions. Prior to composite the two magnetic components, the remanence and saturation magnetization of the components were obtained optimally. Before Mn-Ti doping, the BHF has remanence (Mr) and saturation magnetization 0.206 T and 0.42 T respectively, with the corresponding coersivity (Hc) was 263.1 kA/m. On the other hand, CoFe2O4 (CFO) which has a high saturation magnetization(0.48 T) but with a low coersivity(16.22 kA/m). In form of magnetic composite, the high remanence was almost retained, but with the coersivity value decreased further to the lowest 80.82 kA/m. These two main properties (high remanance and low coersivity) were led the composite being good candidates for microwave absorbing materials. Microwave absorbing characteristics of [Ba(Fe, Mn, Ti)12O19]1-x-[CoFe2O4]x (x = 0.2; 0.5; 0.8) composites were discussed in this paper relation with their corresponding magnetic properties for designing the best microwave absorbing materials.

Original languageEnglish
Article number012046
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 11 May 2020
EventInternational Conference on Science and Technology Applications 2019, ICoSTA 2019 - Medan City, North Sumatera Province, Indonesia
Duration: 13 Nov 201914 Nov 2019

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