mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-19204mrisel-48Research ArticleСтатьиHigh frequency EPR spectroscopy of Er3+ ions in LiYF4 and LiLuF4: a case study of crystal fieldsShakurovG. S.

Sibirsky trakt 10/7, Kazan 420029

shakurov@kfti.knc.ruKorablevaS. L.

Kremlevskaya 18, Kazan 420008

MalkinB. Z.

Kremlevskaya 18, Kazan 420008

Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RASRussian FederationKazan Federal UniversityRussian Federation20191605201921219204 (7 pp.)Copyright © Shakurov G.S., Korableva S.L., Malkin B.Z., 20242024Shakurov G.S., Korableva S.L., Malkin B.Z.Shakurov G.S., Korableva S.L., Malkin B.Z.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/48

We report the electronic paramagnetic resonance (EPR) studies on single crystals of LiRF4 (R = Y and Lu) doped with Er3+ ions in the frequency range of 37-1040 GHz at the liquid helium temperature. Resonance transitions between the Zeeman sublevels of three lower crystal field Kramers doublets of Er3+ ions in magnetic fields up to 1 Tesla are registered. A prominent anisotropy of the EPR spectra in magnetic fields lying in the ab plane of the tetragonal crystal lattice is revealed. The revised set of free-ion and crystal field parameters for LiYF4:Er3+ and the new one for LiLuF4:Er3+ allow us to reproduce successfully the measured frequency and angular dependences of the resonant magnetic fields.

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The authors declare that there are no conflicts of interest present.