Effect of Fe2+ (Fe3+) Doping on Structural Properties of CeO2 Nanocrystals
2009
Autori
Radović, Marko B.Dohcevic-Mitrovic, Z.
Paunović, Novica M.
Šćepanović, Maja
Matović, Branko
Popović, Zoran V.
Članak u časopisu
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
We have measured the Raman scattering and magnetization of pure and Fe2+(Fe3+) doped CeO2 nanopowders at room temperature. The Raman scattering spectra revealed the existence of CeO2 fluorite cubic structure for all investigated samples. The Raman active mode at about 600 cm(-1), seen in all samples, can be ascribed to the CeO2 intrinsic oxygen vacancies. Additional Raman modes at 720 cm(-1), 1320 cm(-1) and 1600 cm(-1), which appear in the spectra of doped samples, can be assigned to maghemite (gamma-Fe2O3) cation deficient structure, to 2 omega(LO) IR-allowed overtone and two magnon structure, respectively. This implies that our powders are composed of mixed valence states and have defective structure. Presence of oxygen defect states and magnetic ions can be responsible for the observed ferromagnetism at room temperature in both pure and Fe doped samples.
Izvor:
Acta Physica Polonica A, 2009, 116, 1, 84-87Finansiranje / projekti:
- Fizika niskodimenzionih i nanometarskih struktura i materijala (RS-MESTD-MPN2006-2010-141047)
Napomena:
- Symposium on Raman Scattering in Materials Science, Sep 15-19, 2008, Warsaw, Poland
DOI: 10.12693/APhysPolA.116.84
ISSN: 0587-4246
WoS: 000269331300020
Scopus: 2-s2.0-67651202058
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Radović, Marko B. AU - Dohcevic-Mitrovic, Z. AU - Paunović, Novica M. AU - Šćepanović, Maja AU - Matović, Branko AU - Popović, Zoran V. PY - 2009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6835 AB - We have measured the Raman scattering and magnetization of pure and Fe2+(Fe3+) doped CeO2 nanopowders at room temperature. The Raman scattering spectra revealed the existence of CeO2 fluorite cubic structure for all investigated samples. The Raman active mode at about 600 cm(-1), seen in all samples, can be ascribed to the CeO2 intrinsic oxygen vacancies. Additional Raman modes at 720 cm(-1), 1320 cm(-1) and 1600 cm(-1), which appear in the spectra of doped samples, can be assigned to maghemite (gamma-Fe2O3) cation deficient structure, to 2 omega(LO) IR-allowed overtone and two magnon structure, respectively. This implies that our powders are composed of mixed valence states and have defective structure. Presence of oxygen defect states and magnetic ions can be responsible for the observed ferromagnetism at room temperature in both pure and Fe doped samples. T2 - Acta Physica Polonica A T1 - Effect of Fe2+ (Fe3+) Doping on Structural Properties of CeO2 Nanocrystals VL - 116 IS - 1 SP - 84 EP - 87 DO - 10.12693/APhysPolA.116.84 ER -
@article{ author = "Radović, Marko B. and Dohcevic-Mitrovic, Z. and Paunović, Novica M. and Šćepanović, Maja and Matović, Branko and Popović, Zoran V.", year = "2009", abstract = "We have measured the Raman scattering and magnetization of pure and Fe2+(Fe3+) doped CeO2 nanopowders at room temperature. The Raman scattering spectra revealed the existence of CeO2 fluorite cubic structure for all investigated samples. The Raman active mode at about 600 cm(-1), seen in all samples, can be ascribed to the CeO2 intrinsic oxygen vacancies. Additional Raman modes at 720 cm(-1), 1320 cm(-1) and 1600 cm(-1), which appear in the spectra of doped samples, can be assigned to maghemite (gamma-Fe2O3) cation deficient structure, to 2 omega(LO) IR-allowed overtone and two magnon structure, respectively. This implies that our powders are composed of mixed valence states and have defective structure. Presence of oxygen defect states and magnetic ions can be responsible for the observed ferromagnetism at room temperature in both pure and Fe doped samples.", journal = "Acta Physica Polonica A", title = "Effect of Fe2+ (Fe3+) Doping on Structural Properties of CeO2 Nanocrystals", volume = "116", number = "1", pages = "84-87", doi = "10.12693/APhysPolA.116.84" }
Radović, M. B., Dohcevic-Mitrovic, Z., Paunović, N. M., Šćepanović, M., Matović, B.,& Popović, Z. V.. (2009). Effect of Fe2+ (Fe3+) Doping on Structural Properties of CeO2 Nanocrystals. in Acta Physica Polonica A, 116(1), 84-87. https://doi.org/10.12693/APhysPolA.116.84
Radović MB, Dohcevic-Mitrovic Z, Paunović NM, Šćepanović M, Matović B, Popović ZV. Effect of Fe2+ (Fe3+) Doping on Structural Properties of CeO2 Nanocrystals. in Acta Physica Polonica A. 2009;116(1):84-87. doi:10.12693/APhysPolA.116.84 .
Radović, Marko B., Dohcevic-Mitrovic, Z., Paunović, Novica M., Šćepanović, Maja, Matović, Branko, Popović, Zoran V., "Effect of Fe2+ (Fe3+) Doping on Structural Properties of CeO2 Nanocrystals" in Acta Physica Polonica A, 116, no. 1 (2009):84-87, https://doi.org/10.12693/APhysPolA.116.84 . .