Electron paramagnetic resonance of exchange-coupled [Fe+—Fe2+] pairs in BaF2: Fe crystal
- Authors: Zaripov R.B.1, Ulanov V.A.1,2, Zainullin R.R.2, Kalimullin R.I.2
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Affiliations:
- Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”
- Kazan State Power Engineering University
- Issue: Vol 88, No 12 (2024)
- Pages: 1901-1910
- Section: Nanooptics, photonics and coherent spectroscopy
- URL: https://journals.rcsi.science/0367-6765/article/view/286485
- DOI: https://doi.org/10.31857/S0367676524120101
- EDN: https://elibrary.ru/EWJIHZ
- ID: 286485
Cite item
Abstract
The study of exchange-coupled [Fe+ - Fe2+] pairs found by authors of the work [1] in X-ray irradiated BaF2:Fe crystals is continued by the EPR method. It is confirmed that the electron spin multiplet S = 7/2 corresponds to the basic state of the studied pairs, split by the anisotropic part of the exchange interaction and the crystal field so that the Kramers doublet turned out to be the ground one. It was found that the energy interval to the next spin doublet corresponds approximately to 125 GHz. It was found that the nearest ligands of iron ions in an exchange-coupled pair [Fe+ - Fe2+] are eight fluorine ions registered in the EPR spectra as structurally equivalent. The parameters of the superhyperfine interaction with the magnetic moments of the nuclei of these ligand ions have been determined. It is shown that the observed experimental facts clearly indicate that the exchange between iron ions in the studied pairs is realized mainly by the mechanism of double Zener exchange.
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About the authors
R. B. Zaripov
Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”
Email: ulvlad@inbox.ru
Zavoisky Physical-Technical Institute
Russian Federation, KazanV. A. Ulanov
Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”; Kazan State Power Engineering University
Author for correspondence.
Email: ulvlad@inbox.ru
Zavoisky Physical-Technical Institute
Russian Federation, Kazan; KazanR. R. Zainullin
Kazan State Power Engineering University
Email: ulvlad@inbox.ru
Russian Federation, Kazan
R. I. Kalimullin
Kazan State Power Engineering University
Email: ulvlad@inbox.ru
Russian Federation, Kazan
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