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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prishchepa O. O., Shabanov A. V., Zyryanov V. Y.
Заглавие : Director configurations in nematic droplets with inhomogeneous boundary conditions
Место публикации : Phys. Rev. E: AMERICAN PHYSICAL SOC, 2005. - Vol. 72, Is. 3. - Ст.31712. - ISSN 1539-3755, DOI 10.1103/PhysRevE.72.031712
Примечания : Cited References: 22
Предметные рубрики: DISPERSED LIQUID-CRYSTALS
TRANSITION
Ключевые слова (''Своб.индексиров.''): lecithin contents--nematic droplets--polarizers--radial structures--approximation theory--boundary conditions--drop breakup--free energy--polarization--textures--nematic liquid crystals
Аннотация: The nematic droplets with director configurations intermediate between the bipolar and radial structures have been investigated experimentally and theoretically. The liquid crystal 4(')-n-pentyl-4-cyanobiphenyl (5CB) with a variable addition of the lecithin dispersed in polyvinylbutyral has been used. The characteristic textures of the droplets formed at various lecithin contents have been examined using polarizing microscope both in the crossed polarizers and without analyzer. The computer simulation has been performed for proper ordering of the director in spherical nematic droplets by minimizing the free energy in the one-constant approximation. The inhomogeneous boundary conditions with strong anchoring of the molecules at the interface have been used. The distribution of the anchoring angle at the droplet surface has been estimated based on analysis of observed patterns. The simulated textures of the droplets under crossed polarizers are shown to compare well with the experimental ones.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Bobrov P.P., Mironov V. L., Kondratieva O.V., Repin A.V.
Заглавие : Frequency Dependence of Permittivity of Free and Bound Water in Soils for Different Textures
Коллективы : Progress In Electromagnetics Research Symposium
Место публикации : Progress in Electromagnetics Research Symposium Proceedings (PIERS 2009). - 2009. - P.752-756
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Вид документа : Однотомное издание
Шифр издания :
Автор(ы) : Bobrov P. P., Mironov V. L., Kondratieva O.V., Repin A.V.
Заглавие : Frequency Dependence of Permittivity of Free and Bound Water in Soils for Different Textures
Место публикации : PIERS Online. - 2009. - Vol. 5, № 5. - P.426-430
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Abylkalykova R. B., Noskov F. M., Arkhipkin V. G., Musikhin V. A., Cherepanov V. N., Niavro A. V.
Заглавие : Local electron structure and magnetization in beta-Fe86Mn13C
Коллективы : International Conference on Nano-structures Self-Assembling
Разночтения заглавия :авие SCOPUS: Local electron structure and magnetization in β- Fe86Mn13C
Место публикации : Superlattices Microstruct. - 2009. - Vol. 46, Is. 1-2. - P.114-120. - ISSN 0749-6036, DOI 10.1016/j.spmi.2008.11.023
Примечания : Cited References: 12
Предметные рубрики: PHASE
Ключевые слова (''Своб.индексиров.''): frank-kasper structure--local electron structure--spin-polarized electronic conditions--frank-kasper structure--local electron structure--spin-polarized electronic conditions--austenite grain--austenitic--c-steel--close packed structures--dynamic loadings--electron structures--frank-kasper structure--induction method--intergranular--local electron structure--local electronic structures--local magnetization--self-consistent field--spin-polarized electronic conditions--transition regions--austenite--diffraction--electronic structure--electrons--magnets--manganese--manganese compounds--optical microscopy--phase transitions--spin dynamics--steel--textures--magnetization--frank-kasper structure--local electron structure--spin-polarized electronic conditions--austenite grain--austenitic--c-steel--close packed structures--dynamic loadings--electron structures--frank-kasper structure--induction method--intergranular--local electron structure--local electronic structures--local magnetization--self-consistent field--spin-polarized electronic conditions--transition regions--austenite--diffraction--electronic structure--electrons--magnets--manganese--manganese compounds--optical microscopy--phase transitions--spin dynamics--steel--textures--magnetization
Аннотация: The aim of the work is to elucidate the origin of magnetization presence in austenitic Fe86Mn13C steel after dynamic loading. The observation of microstructures in the region of transition from FCC austenitic Fe86Mn13C steel to FK12 + FK14 type of Frank-Kasper tetrahedral close packed structure is described. We used the methods of optical microscopy, electron microscopy, electron diffraction and X-ray-diffraction to investigate the phase transition region. Changes of local magnetization were estimated by induction method. To explain the magnetization origin of the sample consisting of austenite grains and intergranular layers, which have Frank-Kasper's structure (FK12 + FK14) typical of beta-Fe-Mn, the local electronic structure has been investigated for intergranular layers. The local electron structure of FK12 and FK14 clusters have been simulated by method of self-consistent field to understand the nature of non-zero magnetization of the Fe87Mn13 alloy exposed by shock deformation. It was shown, that numbers of states with upward and downward spins are not equal. Therefore the occurrence of magnetization is possible. (c) 2009 Published by Elsevier Ltd
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Hsiao Y. C., Hou C. T., Lee W., Zyryanov V. Y.
Заглавие : Multichannel photonic devices based on tristable polymer-stabilized cholesteric textures
Место публикации : Optics Express: Optical Society of America, 2011. - Т. 19, № 24. - С. 23952-23957. - ISSN 1094-4087, DOI 10.1364/OE.19.023952
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Prishchepa O. O., Krakhalev M. N., Sutormin V. S., Shabanov A. V., Lee W., Zyryanov V. Ya.
Заглавие : Optical textures and orientation structures of the nematic droplets with hyperbolic boojums
Коллективы : Topical Meeting on the Optics of Liquid Crystals
Место публикации : 16th Topical Meet. on the Opt. of Liq. Cryst. (OLC 2015): book of abstr. - 2015. - Ст.PA-19
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gardymova, Anna P., Krakhalev M. N., Zyryanov V. Ya.
Заглавие : Optical textures and orientational structures in cholesteric droplets with conical boundary conditions
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [18-72-10036]
Место публикации : Molecules. - 2020. - Vol. 25, Is. 7. - Ст.1740. - ISSN 1420-3049(eISSN), DOI 10.3390/molecules25071740
Примечания : Cited References: 53. - The authors are grateful for the financial support by the Russian Science Foundation (grant No. 18-72-10036).
Предметные рубрики: DISPERSED LIQUID-CRYSTALS
CHIRAL NEMATIC DROPLETS
IONIC MODIFICATION
Аннотация: Cholesteric droplets dispersed in polymer with conical boundary conditions have been studied. The director configurations are identified by the polarising microscopy technique. The axisymmetric twisted axial-bipolar configuration with the surface circular defect at the droplet’s equator is formed at the relative chirality parameter N0≤2.9 . The intermediate director configuration with the deformed circular defect is realised at 2.9N03.95 , and the layer-like structure with the twisted surface defect loop is observed at N0≥3.95 . The cholesteric layers in the layer-like structure are slightly distorted although the cholesteric helix is untwisted.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prishchepa O. O., Zyryanov V. Ya., Gardymova A. P., Shabanov V. F.
Заглавие : Optical textures and orientational structures of nematic and cholesteric droplets with heterogeneous boundary conditions
Место публикации : Mol. Cryst. Liquid Cryst. - 2008. - Vol. 489, Is. 1. - P.84-93. - ISSN 1542-1406, DOI 10.1080/15421400802219817
Примечания : Cited Reference Count: 17. - Гранты: This work was supported in part by the grants of DSP, No 2.1.1.1814; RFBR, No 0803-01007; Council of the President of the RF for Support of Young Scientists and Leading Scientific Schools (projects NSh-3818-2008.3, MK-3624.2007.2); RAS, No 8.1, 2.10.2; SB RAS, No 33.Финансирующая организация: DSP [2.1.1.1814]; RFBR [0803-01007]; Young Scientists and Leading Scientific Schools [NSh-3818-2008.3, MK-3624.2007.2]; RAS [8.1, 2.10.2]; SB RAS [33]
Предметные рубрики: LIQUID-CRYSTAL DROPLETS
ELECTRIC-FIELD
BIPOLAR
Ключевые слова (''Своб.индексиров.''): director configuration--interfaces--nematic and cholesteric droplets--surfactant--director configuration--interfaces--nematic and cholesteric droplets--surfactant--boundary value problems--drop formation--drops--fluid mechanics--phospholipids--surface active agents--boundary conditioning--director configuration--homeotropic--interfaces--nematic and cholesteric droplets--nematic droplets--nematics--optical textures--orientational structures--surface anchoring--surfactant--boundary conditions
Аннотация: Brief review of the orientational structures within the droplets of chiral as well as achiral nematics with the heterogeneous boundary conditions is reported. The modification of boundary conditions in the 5CB/polyvinylbutyral and LN-396/cholesterylacetate/polyvinylbutyral compositions with the planar anchoring at the interface is created by addition of the homeotropic surfactant (lecithin). Sequences of the novel stable and non-stable orientational structures being realized within the droplets of achiral nematic are presented. For the LN-396 nematic droplets doped by cholesterylacetate the formation of a spherulite structure has been shown when the tangential surface anchoring is modified to the homeotropic one.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Belozerova I. L., Shaikhutdinov K. A., Balaev D. A., Dubrovskii A. A., Popkov S. I., Vasil'ev A. D., Mart'yanov O. N.
Заглавие : Preparation, microstructure, magnetic and transport properties of bulk textured Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O(x) and Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O(x)+Agceramics
Коллективы :
Разночтения заглавия :авие SCOPUS: Preparation, microstructure, magnetic and transport properties of bulk textured Bi1.8Pb0.3Sr1.9Ca2Cu 3Ox and Bi1.8Pb0.3Sr 1.9Ca2Cu3Ox+Ag ceramics
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2008. - Vol. 21, Is. 10. - Ст.105019. - ISSN 0953-2048, DOI 10.1088/0953-2048/21/10/105019
Примечания : Cited References: 22. - This work is supported by program of RAS 'Quantum macrophysics' No. 3.4 and integration project of SB RAS No. 3.4 and in part by Krasnoyarsk Regional Scientific Foundation (KRSF), Grants 17G057, 18G148 and 18G011. DAB and AAD acknowledge the Russian Science Support Foundation.
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
CRITICAL-CURRENT DENSITY
BI-2223 TAPES
BI2223
SILVER
DISCS
(BI
Ключевые слова (''Своб.индексиров.''): building materials--calcium--copper--crystallites--diamagnetic materials--lead--lead alloys--magnetic anisotropy--magnetic properties--nanocrystalline alloys--silver--textures--transport properties--bi-2223--bulk samples--degree of textures--diamagnetic responses--liquid mediums--magnetic and transport properties--magnetic measurements--room temperatures--ceramic materials
Аннотация: A new method of preparation of bulk textured Bi2223 ceramics and Bi2223 + Ag composites, based on room temperature pressing of foamed precursor (Bi2223, Bi2223 + Ag) in a liquid medium, is proposed. SEM and XRD data prove a high degree of texture of the bulk samples obtained. Magnetic measurements performed in directions H parallel to c-axis and H parallel to a-b-planes of Bi2223 crystallites demonstrates anisotropy of magnetization confirming the texture of the ceramics. The materials obtained possess large diamagnetic response in the direction H parallel to a-b-planes of Bi2223 crystallites at both 77.4 and 4.2 K.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Smorgon S. L., Zyryanov V. Ya., Shabanov V. F., Pozhidaev E. P.
Заглавие : Textures and orientational structures of elongated FLC droplets in polymer matrix
Коллективы : International Liquid Crystal Conference
Место публикации : 17th International Liquid Crystal Conference (ILCC 1998): program and abstract book. - 1998. - P.252
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