Autor: Pankivskyi, Yu. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Characteristic Features of the Modulated Phases in (MgGeF$\text{}_{6}$)·6H$\text{}_{2}$O Crystals
Autorzy:: Pankivskyi, Yu.
Sveleba, S.
Hrabanski, R.
Powiązania:: https://bibliotekanauki.pl/articles/2038375.pdf
Data publikacji:: 2004-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.-p
Opis:: The temperature dependences of the optical birefringence δ(Δ n$\text{}_{c}$) in (MgGeF$\text{}_{6}$)·6H$\text{}_{2}$O crystal have been investigated. Specific properties observed in experiment such as global hysteresis, kinetic effect, thermooptic memory effect, localization of the incommensurability wave vector on the commensurate values of higher order, sensibility to the external mechanical stress confirm the existence of the incommensurate phase in current crystals.
Źródło:: Acta Physica Polonica A; 2004, 106, 4; 467-474
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Behaviour of the Optical Birefringence in Conditions of the "Viscous" Interaction
Autorzy:: Sveleba, S. A.
Zhmurko, V. S.
Pankivskyi, Yu. I.
Powiązania:: https://bibliotekanauki.pl/articles/2012956.pdf
Data publikacji:: 2000-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.-p
Opis:: The temperature dependences of optical birefringence δ(Δn) for the principal cuts of [N(CH$\text{}_{3}$)$\text{}_{4}$]$\text{}_{2}$CuCl$\text{}_{4}$ crystals are measured. On the basis of the obtained experimental and theoretical data the anomalous behavior of physical parameters in conditions of the "viscous" interaction of the modulated structure with mobile defects in the incommensurate phase is explained.
Źródło:: Acta Physica Polonica A; 2000, 97, 2; 337-348
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The Stochastic Mode of the Modulated Structure in [N(CH$\text{}_{3}$)$\text{}_{4}$]$\text{}_{2}$MeCl$\text{}_{4}$ Dielectric Crystals
Autorzy:: Sveleba, S.
Semotyuk, O.
Katerynchuk, I.
Furgala, Yu.
Pankivskyi, Yu.
Powiązania:: https://bibliotekanauki.pl/articles/2046819.pdf
Data publikacji:: 2006-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.25.Lc
61.44.Fw
64.70.Rh
78.20.Fm
Opis:: Temperature behavior of the optical birefringence in the transitional regions of the incommensurate phase of [N(CH$\text{}_{3}$)]CuCl$\text{}_{4}$ was studied. Temperature dependencies of the modulated structure wave vector and of the specific heat in these regions were analyzed. The stochastic mode of the incommensurate modulated structure in [N(CH$\text{}_{3}$)]MeCl$\text{}_{4}$ (Me = Cu, Fe) dielectric crystals was discovered.
Źródło:: Acta Physica Polonica A; 2006, 109, 6; 695-700
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Phase Transitions in $[N(CH_3)_4]_2ZnCl_4$ and $[N(CH_3)_4]_2CuCl_4$ Crystals Related with the Incommensurate Modulation Existence
Autorzy:: Sveleba, S.
Semotyuk, O.
Katerynchuk, I.
Kunyo, I.
Karpa, I.
Pankivskyi, Yu.
Powiązania:: https://bibliotekanauki.pl/articles/1812043.pdf
Data publikacji:: 2008-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Fw
64.70.Rh
78.20.Fm
65.40.Ba
Opis:: The continuous phase transitions are observed in the crystals with incommensurate phase. They are transitions of parent-incommensurate phases $(T_i)$; transitions between metastable states; incommensurate-commensurate phases $(T_c)$. It was set that phase transition between parent and incommensurate phase is a continuous second-order phase transition with a critical index β = 0.5. The transition between metastable states is a continuous phase transition through the intermediate temperature region - incommensurate phase. The wave vector changes with the temperature here and wave vectorwe q* = q₁ - q₂ appears, where q₁, q₂ denote commensurate values of incommensurability wave vector of neighboring metastable states. It was shown that the phase transition between incommensurate and commensurate phases is a continuous phase transition.
Źródło:: Acta Physica Polonica A; 2008, 114, 4; 791-806
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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