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  1. No Access

    Article

    Anti-Site Defects and Trigonal Center of Holmium in Y3Al5O12:Ho3+ Crystal According to the Results of Wideband EPR Spectroscopy

    EPR spectra of Ho3+ impurity ions were recorded in single crystals of yttrium aluminum garnet (Y3Al5O12, YAG) in the frequency range of 114–410 GHz, at a temperature of 4.2 K. Besides the centers due to unusual s...

    G. R. Asatryan, G. S. Shakurov, N. M. Lyadov… in Optical Memory and Neural Networks (2023)

  2. No Access

    Article

    Wide-Band EPR Spectroscopy of SrY2O4:Ho3+ Crystal

    EPR spectra of impurity Ho3+ ions in oriented SrY2O4 single-crystals are registered at the temperature 4.2 K in the frequency range from 70 to 180 GHz. The results of measurements evidence for the substitution of...

    G. S. Shakurov, B. Z. Malkin, R. G. Batulin, A. G. Kiiamov in Optics and Spectroscopy (2023)

  3. No Access

    Article

    Broadband EPR Spectroscopy of Tb3+ and Fe2+ Ions in YAlO3 Single Crystals

    A YAlO3 crystal with an admixture of iron was studied by broadband EPR spectroscopy. Two types of paramagnetic centers were found. The energy level scheme of one of them is a singlet and a doublet with a splittin...

    G. R. Asatryan, G. S. Shakurov, I. V. Il’in, A. G. Petrosyan… in Physics of the Solid State (2021)

  4. No Access

    Article

    Relaxation Contribution of a System of Jahn–Teller Complexes to the Elastic Moduli of Doped Fluorites

    The results of the study of the temperature dependence of attenuation and velocity of ultrasonic waves are presented for CaF2:Cr and CaF2:Ni crystals in which Cr2+ and Ni2+ ions substitute calcium ions, forming J...

    M. N. Sarychev, A. S. Bondarevskaya… in Journal of Experimental and Theoretical Ph… (2021)

  5. No Access

    Article

    Tunneling Relaxation Mechanisms of the Jahn–Teller Complexes in a CaF2:Cr2+ Crystal

    The temperature dependences of attenuation and the velocity of ultrasonic waves at frequencies of 26–158 MHz in a CaF2 fluorite crystal at the substitution of Jahn–Teller Cr2+ centers for calcium ions have been s...

    M. N. Sarychev, A. S. Bondarevskaya, I. V. Zhevstovskikh, V. A. Ulanov… in JETP Letters (2021)

  6. No Access

    Article

    Jahn–Teller Cr2+ Centers in a CdSe Crystal

    Impurity Cr2+ ions in the CdSe crystal are studied by tunable EPR spectroscopy in the frequency range of 70–320 GHz. The discovered Jahn–Teller tetragonal distortions of the nearest environment of the chromium io...

    G. S. Shakurov, V. V. Gudkov, I. V. Zhevstovskikh… in Physics of the Solid State (2020)

  7. No Access

    Article

    Paramagnetic Resonance of Cr4+ and Mn2+ Ions in a Li2CaSiO4 Crystal

    In a Li2CaSiO4 crystal, tetragonal Cr4+ centers (electron configuration 3d2, spin S = 1) are identified and investigated by the ESR method at different frequencies. The magnitude of zero-field splitting is determ...

    V. A. Vazhenin, G. S. Shakurov, A. P. Potapov in Physics of the Solid State (2020)

  8. No Access

    Article

    Wideband EPR Spectroscopy of Mo3+ Ions in Yttrium–Aluminum Garnet

    The crystals of yttrium–aluminum garnet with an admixture of iron and cerium have been studied by the method of wideband EPR spectroscopy. Resonance absorption of microwave radiation in the frequency range 220...

    G. S. Shakurov, G. R. Asatryan, L. V. Mingalieva… in Physics of the Solid State (2018)

  9. No Access

    Article

    Paramagnetic Chromium Centers in Y2SiO5 and Sc2SiO5 Crystals

    The EPR spectrum of yttrium and scandium silicate single crystals doped with chromium has been studied at various frequencies. Y2SiO5 has one triclinic Cr3+ center, while the Sc2SiO5 crystals demonstrate two none...

    V. A. Vazhenin, A. P. Potapov, G. S. Shakurov, A. V. Fokin… in Physics of the Solid State (2018)

  10. No Access

    Article

    Paramagnetic defects in ZnSe crystals doped with iron ions

    The electron paramagnetic resonance (EPR) spectra of iron-doped ZnSe single crystals were studied. In addition to cubic Fe3+ and Mn2+ centers and also Fe2+, and Cr2+ centers, monoclinic Fe3+ complexes locally com...

    V. A. Vazhenin, A. P. Potapov, G. S. Shakurov, A. V. Fokin… in Physics of the Solid State (2017)

  11. No Access

    Article

    Submillimeter ESR spectra of Fe2+ ions in synthetic and natural beryl crystals

    Electron spin resonance spectra of non-Kramers bivalent iron (Fe2+) ions have been detected in synthetic and natural beryl crystals with an iron impurity. The observed ESR spectra have been attributed to resonanc...

    G. S. Shakurov, R. I. Khaibullin, V. G. Tomas, D. A. Fursenko… in Physics of the Solid State (2017)

  12. No Access

    Article

    Paramagnetic resonance of yttrium aluminum garnet doped with 151Eu2+ ions

    The 151Eu2+ orthorhombic centers in yttrium aluminum garnet crystals have been investigated. The initial splitting and hyperfine interaction parameters have been obtained taking into account the positions of the ...

    V. A. Vazhenin, A. P. Potapov, G. R. Asatryan… in Physics of the Solid State (2016)

  13. Article

    Open Access

    Incipient ferroelectricity of water molecules confined to nano-channels of beryl

    Water is characterized by large molecular electric dipole moments and strong interactions between molecules; however, hydrogen bonds screen the dipole–dipole coupling and suppress the ferroelectric order. The ...

    B. P. Gorshunov, V. I. Torgashev, E. S. Zhukova, V. G. Thomas… in Nature Communications (2016)

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  14. No Access

    Article

    Wide-band EPR spectroscopy of YAlO3: Tm3+ single crystals

    The YAlO3: Tm3+ single crystal has been studied on a wide-band EPR spectrometer. The EPR spectra of Tm3+ ions in the frequency range of 90–160 GHz have been detected for the first time. It has been confirmed that...

    G. R. Asatryan, A. P. Skvortsov, G. S. Shakurov in Physics of the Solid State (2013)

  15. No Access

    Article

    High-Frequency Tunable EPR of Fe2+ in the Natural and Synthetic Forsterite

    The natural forsterites and their synthetic analogs were investigated on a wide-band EPR spectrometer in the frequency region of 65–850 GHz. Two types of non-Kramers ions Fe2+ were discovered at the site M1 (inve...

    G. S. Shakurov, T. A. Shcherbakova, V. A. Shustov in Applied Magnetic Resonance (2011)

  16. No Access

    Article

    High-frequency tunable EPR spectroscopy of non-Kramers ions in AgGaSe2: Cr, AgGaS2: Cr, and CdGa2S4: Cr crystals

    Crystals of the chalcopyrite family, AgGaSe2, AgGaS2, and CdGa2S4, doped with chromium ions have been investigated using high-frequency broad-band EPR spectroscopy in the range 65–530 GHz at T = 4.2 K. It has bee...

    G. S. Shakurov, A. G. Avanesov, S. A. Avanesov in Physics of the Solid State (2009)

  17. No Access

    Article

    Multi-range high-frequency EPR spectroscopy of LiYF4 and LiLuF4 crystals doped by rare-earth ions

    EPR spectra of isostructural LiYF4 and LiLuF4 crystals doped by Dy3+, Er3+, and Ho3+ ions are measured at 4.2 K in the frequency range 40–800 GHz. The effects caused by isotopic disorder in the lithium sublattice...

    G. S. Shakurov, B. Z. Malkin, M. V. Vanyunin, S. L. Korableva in Physics of the Solid State (2008)

  18. No Access

    Article

    Low-energy excited states of 3d transition metal ions in zinc selenide

    The results of studying the impurity heat capacity of Zn1−x M xSe (M = Cr2+, Fe2+, Ni2+, Mn2+) solid solutions in the temperature range 1.8...

    A. T. Lonchakov, S. M. Podgornykh, V. I. Sokolov… in Physics of the Solid State (2006)

  19. No Access

    Article

    Direct measurements of anticrossings of the electron-nuclear energy levels in LiYF4∶Ho3+ with submillimeter EPR spectroscopy

    The electron paramagnetic resonance (EPR) spectra of impurity Ho3+ ions in monocrystals LiYF4∶Ho3+ (0.1 and 1%) with the natural abundance of6Li (7.42%) and7Li (92.58%) isotopes, and in the sample7LiYF4∶Ho3+ (0.1...

    G. S. Shakurov, M. V. Vanyunin, B. Z. Malkin, B. Barbara… in Applied Magnetic Resonance (2005)

  20. No Access

    Article

    Crystal fields of hexameric rare-earth clusters in fluorites

    In solid solutions of alkaline-and rare-earth fluorides with a fluorite structure, ions of most elements of the rare-earth (RE) row form hexameric clusters that assimilate the minor component of the solid solu...

    A. E. Nikiforov, A. Yu. Zakharov, M. Yu. Ugryumov… in Physics of the Solid State (2005)

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