Zobrazeno 1 - 10
of 353
pro vyhledávání: '"Bovtun V"'
Autor:
Bastien, G., Repček, D., Eliáš, A., Kancko, A., Courtade, Q., Haidamak, T., Savinov, M., Bovtun, V., Kempa, M., Carva, K., Vališka, M., Doležal, P., Kratochvílová, M., Barnett, S. A., Proschek, P., Prokleška, J., Kadlec, C., Kužel, P., Colman, R. H., Kamba, S.
The study of magnetic frustration in classical spin systems was motivated by the prediction and discovery of classical spin liquid states. These uncommon magnetic phases are characterized by a massive degeneracy of their ground state implying a finit
Externí odkaz:
http://arxiv.org/abs/2405.19859
Microwave (MW) transmission, absorption, and reflection loss spectra of the ferrimagnetic U-type hexaferrite Sr$_4$CoZnFe$_{36}$O$_{60}$ ceramics were studied from 100 MHz to 35 GHz at temperatures between 10 and 390 K. 9 MW magnetic excitations with
Externí odkaz:
http://arxiv.org/abs/2401.04678
Two Displacive Ferroelectric Phase Transitions in Multiferroic Quadruple Perovskite $BiMn_{7}O_{12}$
Autor:
Maia, A., Kempa, M., Bovtun, V., Vilarinho, R., Kadlec, C., Moreira, J. Agostinho, Belik, A. A., Proschek, P., Kamba, S.
We report on the microwave, terahertz (THz), infrared and Raman spectroscopic studies of $BiMn_{7}O_{12}$ ceramics, shedding more light into the nature of two structural phase transitions and their possible relation with ferroelectricity in this comp
Externí odkaz:
http://arxiv.org/abs/2401.02808
Autor:
Samoylovich M. I., Rinkevich A. B., Bovtun V., Belyanin А. F., Nuzhnyy D., Kempa М., Tsvetkov M., Klescheva S. М.
Publikováno v:
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, Iss 3, Pp 35-41 (2012)
Optical, magnetic and dielectric properties, composition and structure of nanocomposites samples based on lattice packing SiO2 nanospheres (opal matrices) with included clusters of crystalline phase of multiferroics of ferrothorite type in interspher
Externí odkaz:
https://doaj.org/article/927c738405f240f981f0c173f1980fe2
Publikováno v:
Journal of Applied Physics; 8/21/2024, Vol. 136 Issue 7, p1-14, 14p
Autor:
Bovtun, V., Kempa, M., Repček, D., Savinov, M., Buršík, J., Heczko, O., Drahokoupil, J., Kamba, S.
Publikováno v:
In Journal of Magnetism and Magnetic Materials 1 January 2024 589
Publikováno v:
Phys. Rev. B 96, 174113-1/13 (2017)
From the new infrared (IR) reflectivity and time-domain terahertz (THz) spectra combined with available high-frequency dielectric data above the MHz range in a broad temperature range of 10-900 K, a full picture of the soft and central mode behavior
Externí odkaz:
http://arxiv.org/abs/1712.06493
Akademický článek
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Autor:
Kamba, S., Simon, E., Skoromets, V., Bovtun, V., Kempa, M., Pokorny, J., Savinov, M., Koruza, J., Malic, B.
Publikováno v:
Phase Transitions 89, 785-793 (2016)
Dielectric properties of BTZ-BCT ceramics were probed in the frequency range from 10 Hz to 100 THz in a broad temperature range (10-900 K). Polar soft phonon observed in infrared spectra softens with cooling, however below 500 K its frequency becomes
Externí odkaz:
http://arxiv.org/abs/1607.05914
Autor:
Kamba, S., Goian, V., Skoromets, V., Hejtmanek, J., Bovtun, V., Kempa, M., Borodavka, F., Vanek, P., Belik, A. A., Lee, J. H., Pacherova, O., Rabe, K. M.
Publikováno v:
Phys. Rev. B 89, 064308 (2014)
Infrared reflectivity spectra of cubic SrMnO$_{3}$ ceramics reveal 18 % stiffening of the lowest-frequency phonon below the antiferromagnetic phase transition occurring at T$_{N}$ = 233 K. Such a large temperature change of the polar phonon frequency
Externí odkaz:
http://arxiv.org/abs/1402.2165