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Chemical substitution-induced structure transition and enhanced magnetic and optical properties of sol¿gel synthesized multiferroic BiFeO3 nanoparticles

Journal Article


Abstract


  • Abstract: Substitution-induced modifications in structural, magnetic and optical properties of Nb doped and Sm–Nb co-doped BiFeO3 nanoparticles are reported. X-ray diffraction and Raman analyses indicate that the phase transforms from a rhombohedral to orthorhombic one due to Nb doping and Sm–Nb co-doping. The Nb doping and Sm–Nb co-doping both can lead to a decrease in particle size and an enhancement in magnetic properties, but there is a much stronger effect for the Sm–Nb co-doping than for the Nb doping. With increasing doping concentration of Nb and Sm, the maximum and remanent magnetizations first increase and then drop down, i.e., there is a maximum value in both maximum and remanent magnetizations. The optimal maximum and remanent magnetizations are obtained as 0.601 and 0.155 emu/g, respectively, at y = 0.05 for BiFe1 - yNbyO3 nanoparticles, while they are 0.954 and 0.206 emu/g at x = 0.15 for Bi1 - xSmxFe0.95Nb0.05O3 nanoparticles. Meanwhile, the corresponding optical energy band gap of these samples decreases from 2.16 to 2.02 eV with increasing Sm–Nb co-doping concentration, indicating a strong absorption of visible light. Consequently, the magnetic and optical properties of BiFeO3 nanoparticles can be improved considerably by doping high-valence transition and rare earth elements. Graphical Abstract: [InlineMediaObject not available: see fulltext.].

Publication Date


  • 2018

Citation


  • Wang, T., Song, S. H., Wang, X. L., Chen, J. J., & Tan, M. L. (2018). Chemical substitution-induced structure transition and enhanced magnetic and optical properties of sol¿gel synthesized multiferroic BiFeO3 nanoparticles. Journal of Sol-Gel Science and Technology, 85(2), 356-368. doi:10.1007/s10971-017-4552-3

Scopus Eid


  • 2-s2.0-85035746466

Web Of Science Accession Number


Start Page


  • 356

End Page


  • 368

Volume


  • 85

Issue


  • 2

Abstract


  • Abstract: Substitution-induced modifications in structural, magnetic and optical properties of Nb doped and Sm–Nb co-doped BiFeO3 nanoparticles are reported. X-ray diffraction and Raman analyses indicate that the phase transforms from a rhombohedral to orthorhombic one due to Nb doping and Sm–Nb co-doping. The Nb doping and Sm–Nb co-doping both can lead to a decrease in particle size and an enhancement in magnetic properties, but there is a much stronger effect for the Sm–Nb co-doping than for the Nb doping. With increasing doping concentration of Nb and Sm, the maximum and remanent magnetizations first increase and then drop down, i.e., there is a maximum value in both maximum and remanent magnetizations. The optimal maximum and remanent magnetizations are obtained as 0.601 and 0.155 emu/g, respectively, at y = 0.05 for BiFe1 - yNbyO3 nanoparticles, while they are 0.954 and 0.206 emu/g at x = 0.15 for Bi1 - xSmxFe0.95Nb0.05O3 nanoparticles. Meanwhile, the corresponding optical energy band gap of these samples decreases from 2.16 to 2.02 eV with increasing Sm–Nb co-doping concentration, indicating a strong absorption of visible light. Consequently, the magnetic and optical properties of BiFeO3 nanoparticles can be improved considerably by doping high-valence transition and rare earth elements. Graphical Abstract: [InlineMediaObject not available: see fulltext.].

Publication Date


  • 2018

Citation


  • Wang, T., Song, S. H., Wang, X. L., Chen, J. J., & Tan, M. L. (2018). Chemical substitution-induced structure transition and enhanced magnetic and optical properties of sol¿gel synthesized multiferroic BiFeO3 nanoparticles. Journal of Sol-Gel Science and Technology, 85(2), 356-368. doi:10.1007/s10971-017-4552-3

Scopus Eid


  • 2-s2.0-85035746466

Web Of Science Accession Number


Start Page


  • 356

End Page


  • 368

Volume


  • 85

Issue


  • 2