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    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)

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    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)

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    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)

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    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)

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    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)

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    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)

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    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)

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    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)

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