Photo of Oleksandr Kotlyar
    • School of Engineering and Applied Science, Aston University

      B4 7ET Birmingham

      United Kingdom

    20052019

    Research output per year

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    Research Output

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    2019

    The phenomenon of conversion polymorphism in Bi-containing metastable perovskites

    Khalyavin, D. D., Salak, A. N., Fertman, E. L., Kotlyar, O. V., Eardley, E., Olekhnovich, N. M., Pushkarev, A. V., Radyush, Y. V., Fedorchenko, A. V., Desnenko, V. A., Manuel, P., Ding, L., Čižmár, E. & Feher, A., 16 Apr 2019, In : Chemical Communications. 55, 32, p. 4683-4686 4 p.

    Research output: Contribution to journalArticle

    2017

    Magnetic properties of the Bi 0.65 La 0.35 Fe 0.5 Sc 0.5 O 3 perovskite

    Fedorchenko, A. V., Fertman, E. L., Desnenko, V. A., Kotlyar, O. V., Čižmár, E., Shvartsman, V. V., Lupascu, D. C., Salamon, S., Wende, H., Salak, A. N., Khalyavin, D. D., Olekhnovich, N. M., Pushkarev, A. V., Radyush, Y. V. & Feher, A., 1 Apr 2017, In : Acta Physica Polonica A. 131, 4, p. 1069-1071 3 p.

    Research output: Contribution to journalArticle

    Multiferroic Bi 0.65 La 0.35 Fe 0.5 Sc 0.5 O 3 perovskite: Magnetic and thermodynamic properties

    Fertman, E. L., Fedorchenko, A. V., Khalyavin, D. D., Salak, A. N., Baran, A., Desnenko, V. A., Kotlyar, O. V., Čižmár, E., Feher, A., Syrkin, E. S., Vaisburd, A. I., Olekhnovich, N. M., Pushkarev, A. V., Radyush, Y. V., Stanulis, A. & Kareiva, A., 1 May 2017, In : Journal of Magnetism and Magnetic Materials. 429, p. 177-181 5 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    2016

    Electronic structure and magnetic properties of fete, bifeo3, srfe12o19 and srcotife10o19 compounds

    Lyogenkaya, A. A., Grechnev, G. E., Kotlyar, O. V., Panfilov, A. S. & Gnezdilov, V. P., 1 Jan 2016, In : Ukrainian Journal of Physics. 61, 6, p. 523-530 8 p.

    Research output: Contribution to journalArticle

    File

    Electronic structure and magnetic properties of RT4Al8 (R = Sc, Y, La, Lu; T = Fe, Mn, Cr) compounds. Hydrostatic pressure effects

    Zhuravleva, I. P., Grechnev, G. E., Panfilov, A. S., Lyogenkaya, A. A., Kotlyar, O. V., Fedorchenko, A. V. & Feher, A., 7 Jul 2016, In : Low Temperature Physics. 42, 6, p. 458-465 8 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    2015

    Exchange bias phenomenon in (Nd1-xYx)2/3Ca1/3MnO3 (x = 0, 0.1) perovskites

    Fertman, E. L., Fedorchenko, A. V., Kotlyar, A. V., Desnenko, V. A., Čižmár, E., Baran, A., Khalyavin, D. D., Salak, A. N., Shvartsman, V. V. & Feher, A., 31 Dec 2015, In : Low Temperature Physics. 41, 12, p. 1001-1005 5 p.

    Research output: Contribution to journalArticle

    Open Access
    File

    Features of the electron structure of FeTe compounds

    Grechnev, G. E., Lyogenkaya, A. A., Panfilov, A. S., Logosha, A. V., Kotlyar, O. V., Gnezdilov, V. P., Makarova, I. P., Chareev, D. A. & Mitrofanova, E. S., 31 Dec 2015, In : Low Temperature Physics. 41, 12, p. 990-995 6 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    2014

    Low-frequency properties of the phonon spectra, and low-temperature thermodynamics of disordered solid solutions

    Gospodarev, I. A., Grishayev, V. I., Eremenko, A. V., Klochko, M. S., Kotlyar, A. V., Manzheliy, E. V., Syrkin, E. S. & Feodosyev, S. B., 1 Nov 2014, In : Low Temperature Physics. 40, 11, 1013.

    Research output: Contribution to journalArticle

    Open Access
    File
    2013

    Impurity levels in the electronic spectra of graphene

    Feher, A., Feodosyev, S., Gospodarev, I., Kotlyar, O., Kravchenko, K., Manzhelii, E. & Syrkin, E., 1 Jan 2013, In : Superlattices and Microstructures. 53, 1, p. 55-62 8 p.

    Research output: Contribution to journalArticle

    2008

    Local vibrational states in real crystals with impurities near the surface

    Feodosyev, S., Gospodarev, I., Kotlyar, O. & Manzhelii, E., 4 Jun 2008, In : Journal of Physics Condensed Matter. 20, 22, 224025.

    Research output: Contribution to journalArticle

    Local vibrations in real crystals with combined defects

    Gospodarev, I. A., Kotlyar, A. V., Manzhelii, E. V. & Fedosyev, S. B., 13 Mar 2008, In : Low Temperature Physics. 34, 2, p. 152-160 9 p.

    Research output: Contribution to journalArticle

    Open Access
    File

    Loffe-Regel' crossover and boson peaks in disordered solid solutions and similar anomalies in heterogeneous crystalline structures

    Gospodarev, I. A., Grishaev, V. I., Kotlyar, A. V., Kravchenko, K. V., Manzheliǐ, E. V., Syrkin, E. S. & Feodos'Ev, S. B., 9 Oct 2008, In : Low Temperature Physics. 34, 8, p. 655-664 10 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    2007

    Evolution of discrete local levels into an impurity band in solidified inert gas solution

    Kosevich, A. M., Feodosyev, S. B., Gospodarev, I. A., Grishaev, V. I., Kotlyar, O. V., Kruglov, V. O., Manzhelii, E. V. & Syrkin, E. S., 3 Aug 2007, In : Low Temperature Physics. 33, 6, p. 559-563 5 p.

    Research output: Contribution to journalArticle

    Open Access
    File

    Specific features of the transformation of local levels into an impurity band of Ag 1-p Al p disordered solid solutions

    Kosevich, A. M., Gospodarev, I. A., Grishaev, V. I., Kotlyar, A. V., Kruglov, V. O., Manzheliĭ, E. V., Syrkin, E. S. & Feodosyev, S. B., 1 Jul 2007, In : Journal of Experimental and Theoretical Physics. 105, 1, p. 4-11 8 p.

    Research output: Contribution to journalArticle

    To the theory of rare gas alloys: Heat capacity

    Bagatskii, M. I., Feodosyev, S. B., Gospodarev, I. A., Kotlyar, O. V., Manzhelii, E. V., Nedzvetskiy, A. V. & Syrkin, E. S., 3 Aug 2007, In : Low Temperature Physics. 33, 6, p. 564-568 5 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    2006

    Local vibrational modes in crystal lattices with a simply connected region of the quasi-continuous phonon spectrum

    Kotlyar, A. V. & Feodosyev, S. B., 7 Jul 2006, In : Low Temperature Physics. 32, 3, p. 256-269 14 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    2005

    Phonon spectra and discrete oscillatory levels in crystal superlattices of deuterium- and hydrogen-palladium solid solutions

    Feodosyev, S. B., Gospodarev, I. A., Grishaev, V. I., Kosevich, A. M., Kotlyar, O. V. & Syrkin, E. S., 1 Jun 2005, In : Journal of Low Temperature Physics. 139, 5-6, p. 665-674 10 p.

    Research output: Contribution to journalArticle