Temat: 61.30.Pq - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A Lattice Dynamical Investigation of the Raman and the Infrared Wave Numbers of $MnWO_4$
Autorzy:: Gupta, H.
Ruby, -
Sinha, M.
Powiązania:: https://bibliotekanauki.pl/articles/1419784.pdf
Data publikacji:: 2012-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.50.Ah
63.22.Dc
63.70.+h
75.10.Pq
78.30.-j
Opis:: A short-range force constant model has been applied using normal coordinate analysis to investigate the Raman and the infrared modes in multiferroic $MnWO_4$ having space group P2/c. The calculation of zone centre phonons has been made with eight stretching and seven bending force constants. The calculated Raman and infrared wave numbers are in good agreement with the observed ones. The potential energy distribution has also been investigated for determining the significance of contribution from each force constant toward the Raman and the infrared wave numbers.
Źródło:: Acta Physica Polonica A; 2012, 122, 1; 142-145
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Electrochemically Deposited Cobalt Nanoarrays in $SiO_2//n-Si$ Templates Produced by Swift Heavy Ion-Induced Modification Technology
Autorzy:: Koltunowicz, T.
Zhukowski, P.
Fedotova, J.
Bayev, V.
Streltsov, E.
Baran, L.
Powiązania:: https://bibliotekanauki.pl/articles/1400482.pdf
Data publikacji:: 2013-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.15.Pq
78.67.Rb
61.46.Km
75.30.Gw
Opis:: Nanoarrays of Co nanorods were formed by means of electrochemical deposition in the nanoporous $SiO_2//n-Si$ templates. Structure and magnetic properties at room temperatures were studied by means of atomic force and scanning electron microscopies, vibrating sample magnetometry. The presence of perpendicular magnetic anisotropy component at room temperature makes Co nanorods in the nanoporous $SiO_2//n-Si$ templates promising for nanoelectronic devices and biomedical applications.
Źródło:: Acta Physica Polonica A; 2013, 123, 5; 929-931
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Molecular Dynamic of (4-(4Octylobiphenyl)carboxylan) 4-(2-methylobuthyl) phenol Liquid Crystal Having Blue Phase Seen via the Dielectric Spectroscopy Method
Autorzy:: Otowski, W.
Lewińska, G.
Powiązania:: https://bibliotekanauki.pl/articles/1198576.pdf
Data publikacji:: 2014-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.30.Pq
61.30.Eb
64.70.M-
42.70.Df
Opis:: (4-(4'octylobiphenyl)carboxylan) 4-(2-methylobuthyl) phenol (CE8), the substance showing complex polymorphism, has been investigated using the dielectric spectroscopy method. This substance exhibited polymorphism during heating and cooling: a few smectic phases, a cholesteric phase, and a blue phase as well. Despite the fact that the substance polymorphism depends on the rate of heat flow existing of the blue phase has been confirmed by polarizing microscopic observations as well as dielectric spectroscopy investigations.
Źródło:: Acta Physica Polonica A; 2014, 125, 5; 1152-1158
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Polymorphism Investigation of (4-(4-Octylobiphenyl)carboxylane) 4-(2-Methylobuthyl) Phenol Liquid Crystal Having Blue Phase
Autorzy:: Lewińska, G.
Otowski, W.
Powiązania:: https://bibliotekanauki.pl/articles/1538258.pdf
Data publikacji:: 2010-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.30.Pq
61.30.Eb
64.70.M-
42.70.Df
Opis:: (4-(4'-octylo-biphenyl)carbo-xylane) 4-(2-methylo-buthyl) phenol, the substance showing complex polymorphism, has been investigated using the calorimetric, microscopic and X-ray methods. This substance exhibited polymorphism during heating and cooling: a few smectic phases, a cholesteric phase and a blue phase as well. However, the substance polymorphism depends on the rate of heat flow. Existing of the blue phase has been confirmed by polarizing microscopic observations done at several temperature rates.
Źródło:: Acta Physica Polonica A; 2010, 117, 4; 562-565
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Theoretical study of nematic to isotropic transition in porous media
Autorzy:: Govind, A.
Banerjee, Kumarii
Powiązania:: https://bibliotekanauki.pl/articles/1075553.pdf
Data publikacji:: 2016-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.30.-v
61.30.Cz
64.70.M-
61.30.Pq
Opis:: Experimental observations show that the N-I transition temperature (T_{NI}) for liquid crystals embedded in solid porous materials is lower compared to that of the bulk liquid crystals and T_{NI} is reduced linearly with the inverse pore diameter. To explain this, various theoretical studies have been proposed. We propose to use the mean field approach. We modify the Maier-Saupe mean field theory to include the disordering effects of porosity as a disordering surface potential. A molecule near the surface is assumed to feel the mean field potential (the Maier-Saupe type) and also the surface induced potential. We calculate the values of the nematic order parameter and hence find the T_{NI} for different pore diameters. The weighted average of the order parameter is calculated considering the cylindrical symmetry of the pores. Our calculations on the variation of T_{NI} with pore diameter agree with experimental data. Also, the calculated values of specific heat peak decrease with decrease in pore radius, in agreement with experimental trends.
Źródło:: Acta Physica Polonica A; 2016, 130, 3; 748-750
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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