Crystal Structure, Phase and Elemental Composition and Chemical Bonding in Bi1−XAXFeOY Systems (A = Sr, Ca; 0 ≤X ≤ 1) from X-ray Diffraction, Mössbauer, and X-ray Photoelectron Spectra

  • A. T. Kozakov
  • A. G. Kochur
  • V. I. Torgashev
  • S. P. Kubrin
  • V. G. Trotsenko
  • A. A. Bush
  • A. V. Nikolskii
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 193)


An integrated study of samples of Bi1−x A x FeOy (A = Sr, Ca) systems for 0 ≤ x ≤ 1 (step 0.1) is performed using X-ray diffraction (XRD), Mössbauer spectroscopy (MS), and X-ray photoelectron spectroscopy (XPS). Considerable deviations of actual elemental compositions from nominal ones in the samples of both systems are discovered. Both Fe3+ and Fe4+ ions are found to be present in the samples of the Bi1−x Sr x FeOy system with x > 0. No Fe4+ ions are discovered upon substitution of Bi3+ by Ca2+ in Bi1−x Ca x FeOy , neither by Mössbauer spectroscopy, nor by XPS. Charge compensation in Bi1−x Ca x FeOy takes place mostly via creation of oxygen vacancies.



This study was supported by the Ministry of Education and Science of Russian Federation (grants Nos. 3.6105.2017/BCh, 3.5346.2017/BCh, and RFMEFI60714X0110).


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • A. T. Kozakov
    • 1
  • A. G. Kochur
    • 2
  • V. I. Torgashev
    • 3
  • S. P. Kubrin
    • 1
  • V. G. Trotsenko
    • 3
    • 4
  • A. A. Bush
    • 5
  • A. V. Nikolskii
    • 1
  1. 1.Scientific Research Institute of PhysicsSouthern Federal UniversityRostov-on-DonRussia
  2. 2.Rostov State Transport UniversityRostov-on-DonRussia
  3. 3.Faculty of PhysicsSouthern Federal UniversityRostov-on-DonRussia
  4. 4.Laboratory of Condensed Matter PhysicsUniversity of PicardyAmiensFrance
  5. 5.Moscow State Technical University of Radio Engineering, Electronics and AutomationMoscowRussia

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