Výsledky vyhledávání - "V. Porokhonskyy"

Tetragonal Tungsten Bronzes in Ba(M2+1/3Nb2/3)O3Microwave Ceramics

Autor: O. V. Ovchar, V. Porokhonskyy, D. A. Durilin, Anatolii Belous, Taras Kolodiazhnyi, Boštjan Jančar

Publikováno v: Ferroelectrics. 435:176-182

For the first time, the dielectric properties of the 9:1:7 TTB phases Ba9M2+Nb14O45 (M = Co, Mg, Zn) which form in Ba-deficient high-Q perovskite niobates Ba(M2+ 1/3Nb2/3)O3 have been measured in the radio-frequency and microwave range. The low-tempe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7dd655ff9357e5f68ab6d0a1ed9d2109
https://doi.org/10.1080/00150193.2012.740348

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Lattice dynamics and dielectric response of undoped, soft and hard PbZr0.42Ti0.58O3

Autor: V. Porokhonskyy, Dmitry Nuzhnyy, Ivan Gregora, Elena Buixaderas, Li Jin, Dragan Damjanovic, Jan Petzelt, Přemysl Vaněk

Publikováno v: Phase Transitions. 83:917-930

In this study, ceramic samples of lead zirconate titanate Pb(Zr0.42Ti0.58)O3 (PZT 42/58) doped with Fe (hard) and Nb (soft) were studied by Raman, infrared (IR) and THz spectroscopy in the temperature range from 900 to 20 K. From the evaluation of th

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https://doi.org/10.1080/01411594.2010.509601

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Infrared, Raman and high-frequency dielectric spectroscopy and the phase transitions in Na1/2Bi1/2TiO3

Autor: V. Porokhonskyy, I. Franke, J Fábry, D. Noujni, Jan Suchanicz, R. S. Klein, Jan Petzelt, G E Kugel, Alexej Pashkin, Stanislav Kamba, Krystian Roleder

Publikováno v: Journal of Physics: Condensed Matter. 16:2719-2731

Infrared reflectivity, time-domain terahertz transmission, high-frequency dielectric measurements and Raman spectroscopy of Na0.5Bi0.5TiO3 complex ferroelectric perovskite were performed in a broad temperature range. The results were analysed conside

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6147c940015db0b144d4b1b61b7bfec7
https://doi.org/10.1088/0953-8984/16/15/022

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Broad-band dielectric response of doped incipient ferroelectrics

Autor: V Zelezny, V. Porokhonskyy, Jan Petzelt, Viktor Bovtun, Maxim Savinov, Alexej Pashkin

Publikováno v: Journal of the European Ceramic Society. 24:1545-1549

Broad-band dielectric responses (10 2 -10 14 Hz) of Sr 1-1.5x Bi x TiO 3 (x=0.0067÷0.133) ceramics and K 1-x Li x TaO 3 (x=0.050÷14) single crystals are analysed and compared. The common features are emphasized: softening of the polar phonon is sup

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::007a24bc9e74e993d7b279df9d0e141c
https://doi.org/10.1016/s0955-2219(03)00530-2

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Influence of Porosity on the Dielectric Response and Central-Mode Dynamics in PbZrO3Ceramics

Autor: Barbara Malič, V. Porokhonskyy, Paula M. Vilarinho, Tetyana Ostapchuk, I. Rychetský, Jan Petzelt, M. Kosec

Publikováno v: Ferroelectrics. 298:211-218

Dielectric response of two types of nominally pure hot-pressed PbZrO3 ceramics (PZ1 and PZ2) of similar density (97–98%) was studied in the 1 MHz–1 GHz and far infrared frequency ranges in a wide temperature interval. While the far infrared spect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1f6c367d29a53b64cc293c3ccf310f91
https://doi.org/10.1080/00150190490423589

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Dielectric relaxation in tetragonal tungsten bronze ceramics

Autor: V. Hornebecq, Jan Petzelt, Catherine Elissalde, Ivan Gregora, Mario Maglione, Viktor Bovtun, V. Porokhonskyy, Jean Ravez

Publikováno v: Journal of Physics and Chemistry of Solids
Journal of Physics and Chemistry of Solids, Elsevier, 2003, 64 (3), pp.471-476. ⟨10.1016/S0022-3697(02)00342-6⟩

Ferroelectric tantalates with the tetragonal tungsten bronze (TTB) type structure were studied over a wide frequency range from 10 2 to 10 9 Hz. Complementary microwave measurements at 36 GHz and micro-Raman experiments were performed in order to ext

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73697f7b10bbe3af95d0e83ebb74caf2
https://doi.org/10.1016/s0022-3697(02)00342-6

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Broad-band dielectric spectroscopy of Ba $\scriptstyle \mathsf {}$ 2NaNb $\scriptstyle \mathsf {}$ 5O $\scriptstyle \mathsf {}$ 15 single crystal

Autor: V. Porokhonskyy, A. Paskhin, Elena Buixaderas, Maxim Savinov, Jan Petzelt

Publikováno v: The European Physical Journal B - Condensed Matter. 30:319-329

Barium sodium niobate (BNN) single crystals are studied by IR spectroscopy, time-domain THz transmission spectroscopy, HF coaxial wave-guide technique and LF dielectric spectroscopy to cover the frequency range 102-1014 Hz in a wide temperature inter

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https://doi.org/10.1140/epjb/e2002-00385-4

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Wide-Frequency Range Dielectric Relaxations in Sr 1−1.5x Bi x TiO 3 Ceramics

Autor: Maxim Savinov, João L. Baptista, Viktor Bovtun, Tetyana Ostapchuk, Paula M. Vilarinho, P. Samoukhina, V. Porokhonskyy, Jan Petzelt

Publikováno v: Ferroelectrics. 272:357-362

Dielectric properties of the Sr 1 m 1.5x Bi x TiO 3 ceramics (x = 0.002 - 0.167) were investigated in a wide frequency range 10 2 -10 14 Hz. Relaxational dispersion, characteristic for relaxor ferroelectrics, was observed for x S 0.0067. On heating i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8d19938af3cbcd99cfe70b0d78080ed
https://doi.org/10.1080/713716260

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Polar phonons and central mode in antiferroelectric PbZrO3ceramics

Autor: Jan Petzelt, Boris Gorshunov, Viktor Bovtun, I. P. Bykov, Martin Dressel, Petr Kuzel, V. Porokhonskyy, Stanislav Kamba, Maya D. Glinchuk, Alexej Pashkin, Tetyana Ostapchuk, V Zelezny

Publikováno v: Journal of Physics: Condensed Matter. 13:2677-2689

Infrared reflectivity spectra of lead zirconate ceramics were measured in the frequency region of 20-3000 cm-1 and temperature range from 10 to 900 K. The data, extended to lower frequencies by coherent source submillimetre, time-domain terahertz tra

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https://doi.org/10.1088/0953-8984/13/11/322

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Structure of the dielectric spectrum of relaxor ferroelectrics

Autor: Viktor Bovtun, V. Porokhonskyy, Stanislav Kamba, Jan Petzelt, Y. Yakimenko

Publikováno v: Journal of the European Ceramic Society. 21:1307-1311

Wide range dielectric response (10–10 14 Hz) of three relaxor ferroelectrics: PMN, PLZT and PST is analyzed. The common features are: low phonon contribution to the high static permittivity; dielectric relaxation in a wide frequency range; widening

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https://doi.org/10.1016/s0955-2219(01)00007-3

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