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Tunable microwave absorbing property of LaxFeO3/C by introducing A-site cation deficiency

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Abstract

A novel two-dimensional electromagnetic (EM) absorbers which consist of LaFeO3 nanoparticles embedded on hierarchical amorphous carbon nanosheets were fabricated by a simple one-pot method. By inducing A-site cation deficiency in LaFeO3 perovskite, the properties of EM absorption were optimized due to the polarization of dipoles between O vacancy and Fe4+. This research is expectant to provide a new strategy for the improved EM absorption performance by inducing the A-site cation deficiency in perovskite crystal lattices. By the magnetic ferrite nanoparticles doped in the dielectric carbon sheets, we got the best La0.8FeO3−y/C possessing larger absorption bandwidth 5.4 GHz from 12.6 to 18.0 GHz and minimum reflection loss of − 20.4 dB while La0.6FeO3−y/C which hit the minimum RL value − 25.0 dB at 14.8 GHz with the thickness of 3.75 mm.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Nos. 51407134, 51801001), China Postdoctoral Science Foundation (Nos. 2016M590619, 2016M601878), Natural Science Foundation of Shandong Province (No. ZR2019YQ24), Qingdao Postdoctoral Application Research Project, Provincial Key Research and Development Program of Shaanxi (No. 2019GY-197), Key Project of Baoji University of Arts and Sciences (No. ZK2018051), Baoji Science and Technology Project (No. 16RKX1-29) and Baoji Engineering Technology Research Center for Ultrafast Optics and New Materials (No. 2015CXNL-1-3). The authors acknowledge the support from The Thousand Talents Plan, The World-Class University and Discipline, The Taishan Scholar’s Advantageous and Distinctive Discipline Program of Shandong Province and The World-Class Discipline Program of Shandong Province.

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Authors and Affiliations

  1. Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, People’s Republic of China

    Zhenguo Gao, Zirui Jia & Guanglei Wu

  2. School of Science, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Zhenguo Gao, Zirui Jia & Jiaoqiang Zhang

  3. Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji, 721016, People’s Republic of China

    Ailing Feng

  4. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400040, China

    Zhengyong Huang

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  1. Zhenguo Gao
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Gao, Z., Jia, Z., Zhang, J. et al. Tunable microwave absorbing property of LaxFeO3/C by introducing A-site cation deficiency. J Mater Sci: Mater Electron 30, 13474–13487 (2019). https://doi.org/10.1007/s10854-019-01715-0

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