mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-19403mrisel-65Research ArticleСтатьиWideband EPR-spectroscopy of Y3Al5O12:Er3+, (Y0.9Lu0.1)3Al5O12:Er3+ and Y3Al5O12:Fe2+ crystalsAsatryanH. R.

Politekhnicheskaya 26, St. Petersburg 194021

ShakurovG. S.

 Sibirsky trakt 10/7, Kazan 420029

shakurov@kfti.knc.ruPetrosyanA. G.

Ashtarak-2 0203

HovannesyanK. L.

Ashtarak-2 0203

Ioffe Physical-Technical Institute of RASRussian FederationZavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RASRussian FederationInstitute for Physical Research, National Academy of Sciences of ArmeniaArmenia201906062019214SPECIAL ISSUE dedicated to Boris Z. Malkin's 80th birthday19403 (7 pp.)Copyright © Asatryan H.R., Shakurov G.S., Petrosyan A.G., Hovannesyan K.L., 20242024Asatryan H.R., Shakurov G.S., Petrosyan A.G., Hovannesyan K.L.Asatryan H.R., Shakurov G.S., Petrosyan A.G., Hovannesyan K.L.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/65

Using an X-band EPR spectrometer and a submillimeter EPR spectrometer, Y3Al5O12 (YAG), (Y0.9Lu0.1)3Al5O12 (YLuAG) crystals with erbium and YAG with iron were investigated. In YAG:Er crystals the resonance transitions between ground and the first excited doublets in the frequency range 580-750 GHz were observed. The energy interval to the first excited Stark level is measured and the direction of the axes of the g-tensor of the excited doublet is specified. The field-frequency and angular dependences of these transitions are measured and theoretically calculated. In the YAG:Fe crystal a non-Kramers ion was detected in the frequency range 112-150 GHz. It was concluded that resonant transitions between the |+2⟩ ↔ |−2⟩ states of the Fe2+ ion in the tetrahedral environment are observed.

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