Temat: 61.44.Fw - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of Uniaxial Pressure on the Refractive Properties of Rubidium Tetrachlorine Zincanate Crystals
Autorzy:: Stadnyk, V.
Gaba, V.
Kohut, Z.
Popel, O.
Powiązania:: https://bibliotekanauki.pl/articles/1550379.pdf
Data publikacji:: 2010-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Fw
77.84.Fa
78.20.Ci
Opis:: The effect of uniaxial pressure ($σ_m$ ≤ 200 bar) on the spectral (300-800 nm) and temperature (77-300 K) dependences of the refractive indices of $Rb_{2}ZnCl_{4}$ crystals are investigated. The baric dependences of the electron polarizability, specific refraction and the parameters involved in the Sellmeier formula are calculated.
Źródło:: Acta Physica Polonica A; 2010, 117, 1; 136-138
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

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

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:: On the Critical Points of the Structure Amplitude for the Case of One-Dimensional Displacive Modulation
Autorzy:: Śliwińska, T.
Gusin, P.
Warczewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/2043371.pdf
Data publikacji:: 2005-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Fw
61.10.Dp
Opis:: The behavior of the structure amplitude is analyzed in terms of the harmonics of a modulation function for the case of one-dimensional longitudinal displacive modulation. This modulation function is given by a finite series of N sine functions. It turns out that: (1) for the large values of the amplitudes of the modulation function the structure amplitude tends to zero for the arbitrary values of the order m of the satellite reflections; (2) for certain values of the amplitudes of the modulation function the modulus of the structure amplitude assumes its maximum value and (3) for the latter case the intensity of an arbitrary satellite reflection is a function of the intensities of both the closest main reflection and the intensities of the finite set of the neighbor satellite reflections.
Źródło:: Acta Physica Polonica A; 2005, 107, 6; 917-931
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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