Excellent absorption properties of BaFe12−xNbxO19 controlled by multi-resonance permeability, enhanced permittivity, and the order of matching thickness

Literature Information

Publication Date 2017-08-08
DOI 10.1039/C7CP03014B
Impact Factor 3.676
Authors

Chuyang Liu, Yujing Zhang, Yu Tang, Zongrong Wang, Haichao Tang, Yang Ou, Le Yu, Ning Ma, Piyi Du


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Abstract

For the sol–gel-derived BaFe12−xNbxO19 (x = 0–0.6), coercivity (Hc) and saturation magnetization (Ms) vary from 3.53–0.85 kOe and 70.3–53.8 emu g−1 to 1.02–0.22 kOe and 69.6–59.5 emu g−1, respectively, with an increase in sintering temperature from 1250 °C to 1350 °C. Moreover, ε′ and ε′′ increase from 4.13–4.04 and 0.0049–0.0045 to 7.64–6.93 and 1.50–0.97 over 26.5–40 GHz, and the multi-resonance peaks in permeability shift from ∼40+ GHz to ∼27 GHz. The bandwidth (BW) and reflection loss peak intensity (RLp) are broadened and enhanced from 0.8 GHz and −10.3 dB of the sample with x = 0.2 sintered at 1250 °C under 0.92 mm to 11.9+ GHz and −54 dB, respectively, of the sample with x = 0.6 sintered at 1350 °C under 0.86 mm around a millimeter-wave atmospheric window of 35 GHz. The effects of Nb5+ content (x) and sintering temperature on grain size, phase compositions, formations of Fe2+ and oxygen vacancy, and thus on static magnetism and EM parameters are investigated. The correlations of multi-resonance permeability, enhanced permittivity, and the order of matching thickness with absorption properties are also discussed in detail.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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