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Structural and Mössbauer studies of nanocrystalline Mn2+/Zn2+ codoped Fe3O4 particles.

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Title: Structural and Mössbauer studies of nanocrystalline Mn2+/Zn2+ codoped Fe3O4 particles.
Authors: Al-Rashdi, K. S.1,2 (AUTHOR) khadija.alrashdi@utas.edu.om, Widatallah, H. M.2 (AUTHOR), Elzain, M. E.2 (AUTHOR), Al-Rawas, A. D.2 (AUTHOR), Gismelseed, A. M.2 (AUTHOR), Al Ma'Mari, F.2 (AUTHOR), Cespedes, O.3 (AUTHOR)
Source: Interactions (30050731). 2/11/2026, Vol. 247 Issue 1, p1-12. 12p.
Subjects: Mössbauer spectroscopy, Nanoparticles, Phase transitions, X-ray powder diffraction, Raman spectroscopy
Abstract: We report on the formation, crystal structure, and hyperfine interactions of Mn2+/ Zn2+ codoped Fe3O4 nanocrystalline particles using techniques such as XRD, TEM, Raman, and Mössbauer spectroscopies. Highly crystalline spinel-related Mn2+/Zn2+ codoped Fe3O4 nanoparticles with a composition of MnxZn0.2Fe3−yO4 (x = 0.0, 0.1, 0.15, 0.2, 0.25, and 0.3) and an average size of ~ (17 ± 4) nm are synthesized by precipitation method as confirmed by the XRD and TEM. Raman spectroscopic data reveal that codoping with Mn2+ and Zn2+ suppresses the magnetite -to- maghemite phase transformation for the samples with x ≥ 0.2. Consistent with the Raman results, Mössbauer spectroscopic data show a decrease in the γ-Fe2O3 phase as x increases from about 12% for x = 0.0 to approximately 6% for x = 0.15 almost vanishing in samples with x ≥ 0.2. The changes in isomer shifts, quadrupole shifts, and hyperfine fields with increasing x values are discussed. The cationic distribution attained from Mössbauer data analysis indicates that both cations preferentially substitute for Fe3+ cations at the A-site. This preferential substitution is accompanied by interstitial cation substitution, which is required to preserve the overall cationic stoichiometry. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:We report on the formation, crystal structure, and hyperfine interactions of Mn2+/ Zn2+ codoped Fe3O4 nanocrystalline particles using techniques such as XRD, TEM, Raman, and Mössbauer spectroscopies. Highly crystalline spinel-related Mn2+/Zn2+ codoped Fe3O4 nanoparticles with a composition of MnxZn0.2Fe3−yO4 (x = 0.0, 0.1, 0.15, 0.2, 0.25, and 0.3) and an average size of ~ (17 ± 4) nm are synthesized by precipitation method as confirmed by the XRD and TEM. Raman spectroscopic data reveal that codoping with Mn2+ and Zn2+ suppresses the magnetite -to- maghemite phase transformation for the samples with x ≥ 0.2. Consistent with the Raman results, Mössbauer spectroscopic data show a decrease in the γ-Fe2O3 phase as x increases from about 12% for x = 0.0 to approximately 6% for x = 0.15 almost vanishing in samples with x ≥ 0.2. The changes in isomer shifts, quadrupole shifts, and hyperfine fields with increasing x values are discussed. The cationic distribution attained from Mössbauer data analysis indicates that both cations preferentially substitute for Fe3+ cations at the A-site. This preferential substitution is accompanied by interstitial cation substitution, which is required to preserve the overall cationic stoichiometry. [ABSTRACT FROM AUTHOR]
ISSN:30050731
DOI:10.1007/s10751-026-02379-z