Structural, Magnetic and Microwave Absorption Characteristics of Ba1-xLaxFe12O19 (x = 0; 0.1; 0.2;0.3;0.5;0.7)

In this study, effect of La substitution on the microstructure, magnetic properties and microwave absorption characteristics of Ba1-xLaxFe12O19 (x=0, 0.1, 0.2, 0.3, 0.5, 0.7) is reported. The samples were synthesized through mechanical alloying and solid reaction a temperature 1200 °C for 2 hours. A...

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Bibliographic Details
Published in:Key engineering materials 2020-07, Vol.855, p.261-267
Main Authors: Wisnu, Ari Adi, Manaf, Azwar, Taryana, Yana, Wahyu, Yuyu, Mahmudin, D.
Format: Article
Language:English
Subjects:
Anisotropy
Crystallites
Electromagnetic radiation
Frequency ranges
Magnetic properties
Magnetic saturation
Mechanical alloying
Microwave absorption
Particle size distribution
Substitution reactions
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Summary:In this study, effect of La substitution on the microstructure, magnetic properties and microwave absorption characteristics of Ba1-xLaxFe12O19 (x=0, 0.1, 0.2, 0.3, 0.5, 0.7) is reported. The samples were synthesized through mechanical alloying and solid reaction a temperature 1200 °C for 2 hours. A single-phase material occurred only at x = 0 and 0.1. Additional second phases were existing in all samples with x ≥ 0.2 which led to multi-phase materials. The single phase (x = 0 and 0.1) has a relatively uniform particle size distribution with a mean crystallite size 138 nm. Additional phases of respectively Fe2O3 and LaFe2O3 were identified in all samples with x ≥ 0.2. Effect of La substitution is to decrease the magneto crystalline anisotropy constant and the saturation magnetization. The latter is due to a decrease in mass fraction of the main magnetic phase. All Ba1-xLaxFe12O19 samples have superior microwave characteristics which able to absorb more than 99 % the incoming electromagnetic wave entering the material. The absorption bandwidth is found relatively wide within the frequency range 8-12 GHz.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.855.261