Effect of Nd and Nb co-doping on the structural, magnetic and optical properties of multiferroic BiFeO₃ nanoparticles prepared by sol-gel method

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• 作者：Ting Wang¹ ; Ting Xu¹ ; Shang Gao ; S.-H. Song ; ^{shsonguk@aliyun.com} ; ^{shsong@hitsz.edu.cn}
• 关键词：Multiferroics ; BiFeO3 ; Sol-gel technique ; Co-doping ; Magnetic properties ; Optical properties
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 April 2017
• 年：2017
• 卷：43
• 期：5
• 页码：4489-4495
• 全文大小：1153 K
• 卷排序：43

文摘

BiFeO3, BiFe0.95Nb0.05O3 and Bi1−xNdxFe0.95Nb0.05O3 (x=0.0, 0.05, 0.10, 0.15 and 0.20) nanoparticles are successfully synthesized via a tartaric acid-assisted sol-gel technique for the first time. The effect of Nd and Nb co-doping on the structure, morphology, and magnetic and optical properties is investigated. X-ray diffraction (XRD) and Raman measurements demonstrate that Nd3+ ions and Nb5+ ions co-doping at A and B-sites of BiFeO3 can result in a structural transformation (from single rhombohedral phase (R3c) to two coexisting phases (R3c and Pbam)). The morphology of the nanoparticles seems to be approximately cubic, and by the co-doping, the size of the nanoparticles decreases from ~132 to ~35 nm. Notable improvement in the remanent magnetization of the sample with x=0.15 is observed with a value of 0.285 emu/g, being 20 times higher than that of the undoped sample (BiFeO3). A decrease in the optical band gap is also observed in the Nd and Nb co-doped nanoparticles, indicating their favorable potential in photocatalytic applications.