Magnetic, Micro-structural, and Optical Properties of Hexaferrite, BaFe<sub class="a-plus-plus">12sub>O<sub class="a-plus-plus">19sub> Materials Synthesized by Salt Flux-Assisted Method

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• 作者：B. C. Brightlin ; S. Balamurugan
• 关键词：Hexaferrite ; BaFe12O19 ; Molten salt flux ; Magnetic properties ; Optical properties ; Morphology
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：30
• 期：1
• 页码：215-225
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

This paper reports the eco-friendly synthesized BaFe<sub>12sub>O<sub>19sub> phase materials by a molten salt flux approach and their experimental findings. The reaction mixture (BaCO<sub>3sub> and Fe<sub>2sub>O<sub>3sub>) annealed with the mixture of salt (NaCl:KCl) flux yielded good quality nanocrystalline hexagonal ferrite BaFe<sub>12sub>O<sub>19sub> phase materials. The plate-like hexagonal-shaped BaFe<sub>12sub>O<sub>19sub> phase morphology with random particle sizes of ∼370 to 940 nm is seen for the good quality flux-annealed sample. The room-temperature magnetic hysteresis loop of the BaFe<sub>12sub>O<sub>19sub> sample exhibits hard ferromagnetic saturation magnetization (M<sub>ssub>) of 50.23 emu/g at 15 kOe, and coercive field (H<sub>csub>) is 3500 Oe. The determined energy bandgap (E<sub>gsub>) is found to be 3.58 eV for the BaFe<sub>12sub>O<sub>19sub> phase material. The Fourier transform infrared (FT-IR) spectral features confirm the presence of Fe–O and Ba–O bonds in the flux-synthesized BaFe<sub>12sub>O<sub>19sub> materials. The photoluminescence (PL) emission peak (∼360 nm) intensity of BaFe<sub>12sub>O<sub>19sub> materials varies regardless of annealing temperatures. The different salt flux-synthesized BaFe<sub>12sub>O<sub>19sub> materials appear as brown- and dark gray-colored powders that can be applied as a ceramic color pigment due to its high NIR reflectivity.