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- W2002658249 abstract "We report a new synthesis route for preparation of single-domain barium hexaferrite (BaFe12O19) particles with high saturation magnetization. Nitric acid, known as a good oxidizer, is used as a mixing medium during the synthesis. It is shown that formation of BaFe12O19 phase starts at 800 °C, which is considerably lower than the typical ceramic process and develops with increasing temperature. Both magnetization measurements and scanning electron microscope micrographs reveal that the particles are single domain up to 1000 °C at which the highest coercive field of 3.6 kOe was obtained. The best saturation magnetization of ≈60 emu/g at 1.5 T was achieved by sintering for 2 h at 1200 °C. Annealing at temperatures higher than 1000 °C increased the saturation magnetization, on the other hand, decreased the coercive field which was due to the formation of multi-domain particles with larger grain sizes. It is shown that the best sintering to obtain fine particles of BaFe12O19 occurs at temperatures 900–1000 °C. Finally, magnetic interactions between the hard BaFe12O19 phase and impurity phases were investigated using the Stoner–Wohlfarth model." @default.
- W2002658249 created "2016-06-24" @default.
- W2002658249 creator A5062129468 @default.
- W2002658249 date "2009-09-01" @default.
- W2002658249 modified "2023-10-17" @default.
- W2002658249 title "Simple recipe to synthesize single-domain BaFe12O19 with high saturation magnetization" @default.
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- W2002658249 doi "https://doi.org/10.1016/j.jmmm.2009.03.075" @default.
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