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

Research output: Contribution to journalConference articlepeer-review

Abstract

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
Volume1485
Issue number1
DOIs
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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