Impact of Mn2+-Si4+ co-substitution on the electronic structure of Zn0.3Mn0.7Fe2O4 ferrites studied by X-ray photoelectron spectroscopy

Komal K. Jani, Pooja Y. Raval, Nimish H. Vasoya, Monika Nehra, Mamraj Singh, Narendra Jakhar, Sandeep Kumar, Kunal B. Modi, Dong Kwon Lim, Rishi Kumar Singhal

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

X-ray photoelectron spectroscopy (XPS) has been employed to explore the electronic structure of Zn0.3Mn0.7+xSixFe2-2xO4 (x = 0.0–0.3) ferrite series. The Si2p XPS spectra insinuated the presence of Si ions in the +4 valence state. The elemental Si0 and suboxide SiOx are present in the system, the former showing an increase and the latter a decrease in atomic percentage upon Mn–Si substitution. It is also inferred that a fraction of Si0 might be residing at the grain boundaries; however, more studies are required to substantiate this. The Fe2p XPS spectra stipulate that ferrous and ferric ions co-occur in the system. The ferrous ions occupy the octahedral sites while the ferric ions dwell on both the octahedral and the tetrahedral sites. The O1s spectra indicate a remarkable increase in the oxygen defects with increasing Mn–Si substitution (x). The Mn2p XPS data indicate that the Mn+2 states show an overall increasing tendency with increasing Mn–Si concentration. Also, the Mn+4/Mn+3 ratio shows an increment with an increase in Mn–Si substitution.

Original languageEnglish
Pages (from-to)31843-31849
Number of pages7
JournalCeramics International
Volume48
Issue number21
DOIs
Publication statusPublished - 2022 Nov 1

Keywords

  • Electronic structure
  • Spinel ferrite
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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