mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-24215mrisel-268Research ArticleСтатьиDimer self-organization of impurity rare earth ions in forsterite (Mg2SiO4) single crystals as revealed by EPR spectroscopyTarasovV. F.

Kazan 420029

tarasov@kfti.knc.ruZavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RASRussian Federation202429082024262SPECIAL ISSUE dedicated to Boris Z. Malkin's 85th birthday24215 (17 pp.)Copyright © Tarasov V.F., 20242024Tarasov V.F.Tarasov V.F.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/268

Electron paramagnetic resonance is one of the most informative methods for studying the local structure and magnetic properties of impurity paramagnetic centers in crystals. This minireview presents the results of a study of paramagnetic centers formed by rare earth ions Ho3+, Tm3+, Er3+ and Yb3+ in single crystals of synthetic forsterite (Mg2SiO4). The structural features and magnetic properties of the studied centers are presented. It was found that a wellpronounced effect of dimer self-organization is observed for impurity trivalent ions in forsterite. As a result, concentration of dimer associates significantly exceeds the concentration expected with a statistically uniform distribution of impurity ions across the nodes of the crystal lattice.

Electron paramagnetic resonancerare earth ionsforsteritedimer associatesI am grateful to Prof. B.Z. Malkin for attraction our attention to the effect of dimer selforganization of impurity trivalent ions substituting divalent ions in quasi-one-dimensional structural chains in single crystals. I would like to thank my colleagues, together with whom the described results were obtained. E.V. Zharikov, K.A. Subbotin, and D.A. Lis from Prokhorov General Physics institute of RAS grew the samples for the research. V.A. Shustov from Zavoisky Physical-Technical Institute has done a lot of work for the determinations of crystallographic axes in samples by the X-ray diffraction. A.A. Konovalov, L.V. Mingalieva, A.A. Sukhanov R.B. Zaripov from Zavoisky Physical- Technical Institute and S.I. Nikitin, E.N. Vorobieva, D.G. Zverev from Kazan (Volga Region) Federal University carried out measurements of the EPR spectra. 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The authors declare that there are no conflicts of interest present.