EPR and NEXAFS spectroscopy of BiNb1-xFexO4-δ ceramics

N. Zhuk, V. P. Lutoev, V. A. Belyy, B. Makeev, D. S. Beznosikov, S. V. Nekipelov, Maria V. Yermolina

Research output: Contribution to journalArticle

Abstract

The methods of EPR and NEXAFS spectroscopy were employed for the study of BiNb1-xFexO4-δ solid solutions of triclinic and orthorhombic modifications. The analysis of the NEXAFS Fe2p-spectra of iron oxides and the iron-containing solid solutions revealed that Fe atoms were mainly in an oxidation state of +3. In the EPR spectra of the BiNb1-xFexO4-δ samples of orthorhombic modification, a broad line with the center at g of 2.16–2.37 was registered along with the low-intensity signal with a g-factor of ∼4.3 observed on its low-field wing. EPR spectra of the triclinic structure samples exhibited a complex system of lines in the range of 80–300 mT. An intense complex line having features at g of 4.74–4.80, 4.04–4.10 and 3.76–3.80 was recognized in the low-field signal. The low-field wing of the line was complicated by a shoulder with g of 5.3 and by a line in the form of an absorption signal with g of 7.7–8.0. As a result of the modeling of EPR spectra, the spin-Hamiltonian parameters of Fe(III) in the structure of BiNb1-xFexO4-δ of triclinic modification were obtained.

LanguageEnglish (US)
Pages142-146
Number of pages5
JournalPhysica B: Condensed Matter
Volume552
DOIs
StatePublished - Jan 1 2019

Fingerprint

Niobium compounds
niobium compounds
Bismuth compounds
bismuth compounds
X ray absorption near edge structure spectroscopy
Ceramic materials
Iron oxides
iron oxides
Paramagnetic resonance
Solid solutions
solid solutions
Iron
ceramics
iron
wings
spectroscopy
Hamiltonians
shoulders
complex systems
Large scale systems

Keywords

  • BiNbO
  • Ceramics
  • EPR spectroscopy
  • Iron
  • NEXAFS spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Zhuk, N., Lutoev, V. P., Belyy, V. A., Makeev, B., Beznosikov, D. S., Nekipelov, S. V., & Yermolina, M. V. (2019). EPR and NEXAFS spectroscopy of BiNb1-xFexO4-δ ceramics. Physica B: Condensed Matter, 552, 142-146. https://doi.org/10.1016/j.physb.2018.09.042

EPR and NEXAFS spectroscopy of BiNb1-xFexO4-δ ceramics. / Zhuk, N.; Lutoev, V. P.; Belyy, V. A.; Makeev, B.; Beznosikov, D. S.; Nekipelov, S. V.; Yermolina, Maria V.

In: Physica B: Condensed Matter, Vol. 552, 01.01.2019, p. 142-146.

Research output: Contribution to journalArticle

Zhuk, N, Lutoev, VP, Belyy, VA, Makeev, B, Beznosikov, DS, Nekipelov, SV & Yermolina, MV 2019, 'EPR and NEXAFS spectroscopy of BiNb1-xFexO4-δ ceramics' Physica B: Condensed Matter, vol. 552, pp. 142-146. https://doi.org/10.1016/j.physb.2018.09.042
Zhuk N, Lutoev VP, Belyy VA, Makeev B, Beznosikov DS, Nekipelov SV et al. EPR and NEXAFS spectroscopy of BiNb1-xFexO4-δ ceramics. Physica B: Condensed Matter. 2019 Jan 1;552:142-146. https://doi.org/10.1016/j.physb.2018.09.042
Zhuk, N. ; Lutoev, V. P. ; Belyy, V. A. ; Makeev, B. ; Beznosikov, D. S. ; Nekipelov, S. V. ; Yermolina, Maria V. / EPR and NEXAFS spectroscopy of BiNb1-xFexO4-δ ceramics. In: Physica B: Condensed Matter. 2019 ; Vol. 552. pp. 142-146.
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