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Structural, optical, magnetic properties and energy-band structure of MFe2O4 (M = Co, Fe, Mn) nanoferrites prepared by co-precipitation technique.
Thanh, Tran Dang; Ngoc Nha, Tran Thi; Ha Giang, Tran Thi; Nam, Pham Hong; Toan, Dang Ngoc; Khan, Dinh Thanh; Manh, Do Hung; Phong, Pham Thanh.
Afiliación
  • Thanh TD; Institute of Materials Science, Vietnam Academy of Science and Technology 18-Hoang Quoc Viet Hanoi City Vietnam.
  • Ngoc Nha TT; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18-Hoang Quoc Viet Hanoi City Vietnam.
  • Ha Giang TT; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18-Hoang Quoc Viet Hanoi City Vietnam.
  • Nam PH; Institute of Materials Science, Vietnam Academy of Science and Technology 18-Hoang Quoc Viet Hanoi City Vietnam.
  • Toan DN; Institute of Materials Science, Vietnam Academy of Science and Technology 18-Hoang Quoc Viet Hanoi City Vietnam.
  • Khan DT; Institute of Research and Development, Duy Tan University 550000 Danang Vietnam.
  • Manh DH; Faculty of Natural Sciences, Duy Tan University 550000 Danang Vietnam.
  • Phong PT; The University of Danang-University of Science and Education Danang 550000 Vietnam.
RSC Adv ; 14(33): 23645-23660, 2024 Jul 26.
Article en En | MEDLINE | ID: mdl-39077327
ABSTRACT
MFe2O4 (M = Co, Fe, Mn) nanoparticles were successfully formed through the chemical co-precipitation technique. X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray analysis were used to investigate samples' structural properties. The investigated structural properties included phases formed, crystallite size, cation distribution, hopping length, bond length, bond angle, edge length, and shared and unshared octahedral edge length. Scanning electron micrographs of the prepared samples demonstrated well-defined crystalline nanoparticles. The grain diameter was 15, 9, and 34 nm for CoFe2O4, Fe3O4, and MnFe2O4, respectively. The energy-dispersive X-ray analysis confirmed the existence of every element (Co, Fe, and O) and no discernible impurities in the samples. The optical properties were studied in detail through photoluminescence (PL) spectroscopy and Raman spectroscopy. The presence of active modes in Raman spectra confirmed the spinel structure of the MFe2O4 nanoparticles. The direct bandgap energy estimated through UV-visible spectroscopy was about 2.59-2.64 eV, corresponding with the energy-band structures of the octahedral site (1.70 eV) and the tetrahedral site (0.9 eV). This result was further confirmed by PL emission spectra. Based on Mie theory and UV-visible and PL spectral data, the mechanism of photothermal characterization for MFe2O4 nanoparticles was determined. Investigating the changes in temperature of magnetic parameters including coercivity, squareness ratio, and saturation magnetization for MFe2O4 samples showed the dominant influence of ion distribution and A-A, A-B, and B-B exchange interactions. This study also showed that strong anisotropy and weak dipolar interaction tended to increase the coercivity and squareness ratio of CoFe2O4. Conversely, weaker anisotropy and stronger dipolar interaction corresponded with the small coercivity and squareness ratio of Fe3O4 and MnFe2O4 samples.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido