Zobrazeno 1 - 10
of 1 092
pro vyhledávání: '"Petzelt, J"'
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
Autor:
Petzelt, J., Nuzhnyy, D., Savinov, M., Bovtun, V., Kempa, M., Ostapchuk, T., Hlinka, J., Canu, G., Buscaglia, V.
Broadband dielectric spectroscopy from Hz up to the infrared (IR) range and temperature interval 10-300 K was carried out for xBaZrO3-(1-x)BaTiO3 (BZT-x, x = 0.6, 0.7, 0.8) solid solution ceramics and compared with similar studies for x = 0, 0.2, 0.4
Externí odkaz:
http://arxiv.org/abs/1312.3131
Autor:
Kamba, S., Goian, V., Orlita, M., Nuzhnyy, D., Lee, J. H., Schlom, D. G., Rushchanskii, K., Lezaic, M., Birol, T., Fennie, C. J., Gemeiner, P., Dkhil, B., Bovtun, V., Kempa, M., Hlinka, J., Petzelt, J.
Publikováno v:
Phys. Rev. B 85, 094435 (2012)
Compressively strained epitaxial (001) EuTiO3 thin films of tetragonal symmetry have been deposited on (001) (LaAlO3)_0.29-(SrAl_{1/2}Ta_{1/2}O3)_0.71 (LSAT) substrates by reactive molecular-beam epitaxy. Enhancement of the Neel temperature by 1 K wi
Externí odkaz:
http://arxiv.org/abs/1201.5458
Autor:
Nuzhnyy, D., Petzelt, J., Bovtun, V., Kempa, M., Savinov, M., Elissalde, C., Chung, U-C., Michau, D., Maglione, M., Estournes, C.
Publikováno v:
Journal of Advanced Dielectrics 1, 309-317 (2011)
Three types of BaTiO3 core - amorphous nano-shell composite ceramics were processed from the same core-shell powder by standard sintering, spark-plasma sintering and two-step sintering techniques and characterized by XRD, HRSEM and broad-band dielect
Externí odkaz:
http://arxiv.org/abs/1111.3738
Autor:
Nuzhnyy, D., Petzelt, J., Kamba, S., Yamada, T., Tyunina, M., Tagantsev, A. K., Levoska, J., Setter, N.
Publikováno v:
J. Electroceram. 22, 297 (2009)
Several SrTiO3 (STO) thin films without electrodes processed by pulsed laser deposition, of thicknesses down to 40 nm, were studied using infrared transmission and reflection spectroscopy. The complex dielectric responses of polar phonon modes, parti
Externí odkaz:
http://arxiv.org/abs/0904.4403
Autor:
Bovtun, V., Kamba, S., Veljko, S., Nuzhnyy, D., Kroupa, J., Savinov, M., Vanek, P., Petzelt, J., Holc, J., Kosec, M., Amorin, H., Alguero, M.
Publikováno v:
Phys. Rev. B 79, 104111 (2009)
Dielectric response e*(f,T) and polar phonon spectra of coarse grain (grain size ~ 4 mkm) and fine grain (grain size ~ 150 nm) ceramics of PbMg_(1/3)Nb_(2/3)O3-35%PbTiO3 were investigated at temperatures 10 - 900 K. e*(f,T) in coarse-grain ceramics e
Externí odkaz:
http://arxiv.org/abs/0812.3301
Autor:
Kamba, S., Nuzhnyy, D., Veljko, S., Bovtun, V., Petzelt, J., Wang, Y. L., Levoska, J., Tyunina, M., Macutkevic, J., Setter, N., Banys, J.
Relaxor ferroelectric PbMg_1/3Ta_2/3O_3 ceramics and thin films were investigated by means of broad-band dielectric, time-domain terahertz (THz) and Fourier-transform infrared (IR) spectroscopy in the frequency range 100 Hz - 90 THz at temperatures 1
Externí odkaz:
http://arxiv.org/abs/0707.2044
Autor:
Kamba, S., Nuzhnyy, D., Vanek, P., Savinov, M., Knizek, K., Shen, Z., Santava, E., Maca, K., Sadowski, M., Petzelt, J.
Publikováno v:
EPL, 80 (2007) 27002
Infrared reflectivity and time-domain terahertz transmission spectra of EuTiO3 ceramics revealed a polar optic phonon at 6 - 300K, whose softening is fully responsible for the recently observed quantum paraelectric behaviour. Even if our EuTiO3 ceram
Externí odkaz:
http://arxiv.org/abs/0706.1882
Autor:
Kamba, S., Nuzhnyy, D., Denisov, S., Veljko, S., Bovtun, V., Savinov, M., Petzelt, J., Kalnberga, M., Sternberg, A.
Publikováno v:
Phys. Rev. B 76, 054125 (2007)
Pb_1.83Mg_0.29Nb_1.71O_6.39 (PMN) crystallizing in a cubic pyrochlore structure exhibits, as the first dielectrics with pyrochlore structure, typical feature of quantum paraelectrics - its permittivity continuously increases on cooling and levels off
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703159
Ferroelectric soft mode properties in ceramics and thin films are reviewed and compared with single crystals. In general, the permittivity in ceramics and thin films is markedly reduced compared to the single crystals mainly because of low-permittivi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0611016