| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electromagnetic wave absorption properties of Ba(CoTi)xFe12-2xO19@BiFeO3 in hundreds of megahertz band |
| Zhi-Biao Xu(徐志彪)1, Zhao-Hui Qi(齐照辉)2, Guo-Wu Wang(王国武)1, Chang Liu(刘畅)1, Jing-Hao Cui(崔晶浩)1, Wen-Liang Li(李文梁)1, and Tao Wang(王涛)1,† |
1 Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
2 The Institute of Effectiveness Evaluation of Flying Vehicle, Beijing 100089, China |
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Abstract The high-performance electromagnetic (EM) wave absorption material Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ was prepared by solid-state reaction, and its EM wave absorption properties were deeply studied. The results revealed that Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ could obtain excellent absorption properties in hundreds of megahertz by adjusting the Co$^{2+}$-Ti$^{4+}$ content. The best comprehensive property was obtained for $x=1.2$, where the optimal reflection loss ($RL$) value reaches $-30.42$ dB at about 600 MHz with thickness of 3.5 mm, and the corresponding effective absorption band covers the frequency range of 437 MHz-1 GHz. Moreover, the EM wave absorption mechanism was studied based on the simulation methods. The simulated results showed that the excellent EM wave absorption properties of Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ mainly originated from the internal loss caused by natural resonance, and the interface cancelation further improved the absorption properties and resulted in $RL$ peaks.
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Received: 23 November 2021
Revised: 22 January 2022
Accepted manuscript online: 07 February 2022
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PACS:
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75.47.Lx
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(Magnetic oxides)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11574122) and the Joint Fund of Equipment Pre-Research and Ministry of Education, China (Grant No. 6141A02033242). |
Corresponding Authors:
Tao Wang
E-mail: wtao@lzu.edu.cn
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Cite this article:
Zhi-Biao Xu(徐志彪), Zhao-Hui Qi(齐照辉), Guo-Wu Wang(王国武), Chang Liu(刘畅), Jing-Hao Cui(崔晶浩), Wen-Liang Li(李文梁), and Tao Wang(王涛) Electromagnetic wave absorption properties of Ba(CoTi)xFe12-2xO19@BiFeO3 in hundreds of megahertz band 2022 Chin. Phys. B 31 087504
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