Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 608, Issue -, Pages 1868-1881Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.09.182
Keywords
BiFeO3; Bandgap; Magnetic properties; First principle calculations; Reflection loss
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Funding
- National Natural Science Foundation of China (NSFC) [51772080]
- Southeast University high-level talent project [3203002003A]
- Foundation of Nanjing Xiaozhuang University [2020NXY12]
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The study introduces BiNdxCrxFe1-2xO3 nanoparticles with electromagnetic matching that show tunable magneto-optical and feasible microwave absorption characteristics for microwave absorber applications. Co-doping of Nd and Cr plays a key role in ordering the BFO crystal structure, leading to enhanced microwave absorption properties.
Tunable microwave absorption characteristics are highly desirable for industrial applications such as antenna, absorber, and biomedical diagnostics. Here, we report BiNdxCrxFe1-2xO3 (x = 0, 0.05, 0.10, 0.15) nanoparticles (NPs) with electromagnetic matching, which exhibit tunable magneto-optical and feasible microwave absorption characteristics for microwave absorber applications. The experimental results and theoretical calculations demonstrate the original bismuth ferrite (BFO) crystal structure, while Nd and Cr injection in the BFO structure may cause to minimize dielectric losses and enhance magnetization by producing interfacial defects in the spinel structure. Nd and Cr co-doping plays a key role in ordering the BFO crystal structure, resulting in improved microwave absorption characteristics. The BiNd0.10Cr0.10Fe1.8O3 (BNCF2) sample exhibits a remarkable reflection loss (RL) of -37.7 dB with a 3-mm thickness in the 10.15 GHz-10.30 GHz frequency region. Therefore, Nd and Cr doping in BFO nanoparticles opens a newpathway to construct highly efficient BFO-based materials for tunable frequency, stealth, and microwave absorber applications. (c) 2021 Elsevier Inc. All rights reserved.
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