Zobrazeno 1 - 10
of 33
pro vyhledávání: '"R. S. Brezvin"'
Publikováno v:
Optics and Spectroscopy. 129:227-233
The temperature, spectral and baric dependences of birefringence Δni of potassium sulfate crystals doped with 1.7% of copper are studied. It is established that the impurity introduction changes an absolute value of Δni and leads to an increase of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::407bef4893a79286ac034ef912206d8b
https://doi.org/10.1134/s0030400x21020144
https://doi.org/10.1134/s0030400x21020144
Autor:
O.Y. Khyzhun, M. Ya. Rudysh, A.O. Fedorchuk, R. S. Brezvin, V. Yo. Stadnyk, P. A. Shchepanskyi, R. B. Matviiv
Publikováno v:
Current Applied Physics. 21:80-88
K2SO4:Cu2+ (3%) crystal has been synthesized and its crystal structure is characterized by means of the X-ray diffraction method and discussed within the second coordination environment description. Experimental dispersions of the refractive indices
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53c0aab695acecc2a8bd17e77a334951
https://doi.org/10.1016/j.cap.2020.09.015
https://doi.org/10.1016/j.cap.2020.09.015
Autor:
V. Yo. Stadnyk, M. Ya. Rudysh, R. B. Matviiv, P. A. Shchepanskyi, B. V. Andrievskii, R. S. Brezvin
Publikováno v:
Journal of Applied Spectroscopy. 87:143-149
Potassium sulfate crystals with a copper content of 1.7% were synthesized, and the dependence of their refractive indices ni(λ) and birefringence Δni(λ) on their dispersion was studied. It was found that the dispersion ni(λ) in the spectral range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::598a15362e9b64f1a877145878750b81
https://doi.org/10.1007/s10812-020-00975-7
https://doi.org/10.1007/s10812-020-00975-7
Publikováno v:
Optics and Spectroscopy. 127:1023-1027
Spectral, temperature, and baric dependences of birefringence Δni of LiNaSO4 (LSS) crystals have been studied. It is established that dispersion Δn(λ) is anomalous. It is shown that uniaxial compression leads to changes in Δnі with different mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbb67fe16fa0c7f99d8c5c57090f4841
https://doi.org/10.1134/s0030400x19120257
https://doi.org/10.1134/s0030400x19120257
Publikováno v:
2021 IEEE 12th International Conference on Electronics and Information Technologies (ELIT).
The temperature changes of birefringence and refractive indices of the impurity crystal of potassium sulfate were studied. It is found that the curves $\Delta \boldsymbol{n}_{i}(\boldsymbol{T})$ and ni $(\boldsymbol{T})$ do not change qualitatively i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ab0a4938ff7f97a3d956b92426b3193
https://doi.org/10.1109/elit53502.2021.9501089
https://doi.org/10.1109/elit53502.2021.9501089
Publikováno v:
2021 IEEE 12th International Conference on Electronics and Information Technologies (ELIT).
Ab initio calculations of the ferroelectric phase ammonium fluoroberyllate crystal (NH 4 ) 2 BeF 4 (AFB) (space group $\boldsymbol{Pcn2}_{1})$ in the framework of density functional theory (DFT) were conducted for the first time. Information about po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2402003d0f0e14e6fe80b2795dbdfa3
https://doi.org/10.1109/elit53502.2021.9501145
https://doi.org/10.1109/elit53502.2021.9501145
Autor:
Z. A. Kohut, R. S. Brezvin, V. Yo. Stadnyk, O. R. Onufriv, Ya. P. Kost, M. Ya. Rudysh, P. A. Shchepanskyi
Publikováno v:
Crystallography Reports. 64:787-792
An effect of uniaxial pressure on the spectral and temperature dependences of birefringence of K1.75[NH4]0.25SO4 single crystals has been studied. Different changes in the birefringence are found for different compression directions. The possibility
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da7136491c8f1cc186089167fb0969f4
https://doi.org/10.1134/s1063774519050201
https://doi.org/10.1134/s1063774519050201
Autor:
V. M. Gaba, V. Yo. Stadnyk, M. Ya. Rudysh, R. S. Brezvin, Z. O. Kohut, P. A. Shchepanskyi, A. I. Kashuba
Publikováno v:
Journal of Applied Spectroscopy. 85:1022-1028
Vibrational spectra of β-LiNH4SO4 crystals in the ferroelectric phase (space group No. 33) are studied. The vibrational symmetry is classified using group-theoretical analysis. Vibrational frequencies of crystal structural elements are calculated ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbdc3e7fd41d7a3866c09e0305bcf2bb
https://doi.org/10.1007/s10812-019-00754-z
https://doi.org/10.1007/s10812-019-00754-z
Publikováno v:
Optics and Spectroscopy. 125:353-357
The energy band structure of a LiNaSO4 has been calculated within the framework of density functional theory for space group P31c. It has been established that bandgap width Eg in the GGA approximation is 5.49 eV. The valence band top is generally fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9054928092c850c13e5bf3bfddae5bb3
https://doi.org/10.1134/s0030400x18090217
https://doi.org/10.1134/s0030400x18090217
Publikováno v:
Ukrainian Journal of Physical Optics. 19:141-149
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c0b1556a13ca53d3b9e8bb48ad01afd
https://doi.org/10.3116/16091833/19/3/141/2018
https://doi.org/10.3116/16091833/19/3/141/2018