Journal
PHYSICS LETTERS A
Volume 389, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2020.127069
Keywords
Cubic Fe3O4 nanoparticles; Graphene oxide; Ultrasonication; Nanocomposites; Reflection loss; Bandwidth
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016M3A7B4900267]
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The study fabricated cube-like Fe3O4/graphene oxide (GO) nanocomposites with high saturation magnetization and moderate coercivity, demonstrating exceptional electromagnetic wave absorbing characteristics. This material shows potential for high-performance microwave-absorbing devices.
We fabricate the cube-like Fe3O4/graphene oxide (GO) nanocomposites by a one-pot ultrasonication process. The high saturation magnetization, M-S 74.8-82 emu/g, with moderate coercivity, H-C 112-121 Oe, was revealed in samples. The Fe3O4/GO nanocomposites achieved a value of maximum reflection loss (RLmax) of -66.7 dB at 16.8 GHz for a thickness of only 1.5 mm. A bandwidth (RL @ -10 dB) covers a wide value of 4.0 GHz. Besides, Fe3O4/GO nanocomposites illustrate the remarkable electromagnetic wave absorbing characteristics owing to optimal matching impedance, synergistic magnetic loss, and high dielectric loss. Furthermore, we discussed the feasible insights for the microwave absorption mechanism in Fe3O4/GO nanocomposites, which is a potential candidate for high-performance microwave-absorbing devices. (C) 2020 Elsevier B.V. All rights reserved.
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