Probe Mössbauer Spectroscopy of BiNi0.9657Fe0.04O3
| Autor: | Yu. O. Lekina, Alexey V. Sobolev, I. S. Glazkova, Igor A. Presniakov, A. A. Belik |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element 02 engineering and technology 01 natural sciences Molecular physics Spectral line Inorganic Chemistry Condensed Matter::Materials Science symbols.namesake 0103 physical sciences Mössbauer spectroscopy Materials Chemistry Physics::Atomic Physics 010306 general physics Hyperfine structure Zeeman effect Metals and Alloys 021001 nanoscience & nanotechnology Dipole Nickel chemistry Quadrupole symbols Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Electric field gradient |
| Zdroj: | Inorganic Materials. 54:990-997 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168518100126 |
| Popis: | This paper presents results of a 57Fe probe Mossbauer spectroscopy study of the BiNi0.9657Fe0.04O3 nickelate. The spectra measured above its TN demonstrate that Fe3+ cations heterovalently substitute for Ni2+ nickel (←Fe3+), being stabilized on four sites of the nickel sublattice in the structure of BiNiO3. Calculations in an ionic model with allowance for monopole and dipole contributions to the electric field gradient indicate that the parameters of electric hyperfine interactions between 57Fe probe atom nuclei reflect the specifics of the local environment of the nickel in the structure of the unsubstituted BiNiO3 nickelate. Below TN, Mossbauer spectra transform into a complex Zeeman structure, which is analyzed in terms of first-order perturbation theory with allowance for electric quadrupole interactions as a small perturbation of the Zeeman levels of the 57Fe hyperfine structure, as well as for specific features of the magnetic ordering of the Ni2+ cations in the nickelate studied. |
| Databáze: | OpenAIRE |
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