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A study of the microwave dielectric permittivity of liquid crystals in electric and magnetic fields / B. A. Belyaev [et al.] // Tech. Phys. - 1998. - Vol. 43, Is. 1. - P. 105-109, DOI 10.1134/1.1258946. - Cited References: 8 . - ISSN 1063-7842
Аннотация: A microwave detector based on a self-sustained oscillator circuit is proposed as a means to investigate the real and imaginary components of the dielectric permittivity of liquid crystals in external electric and magnetic fields. Results are given for measurements of a 500 MHz oscillator frequency for two types of nematic crystals, 5CBP and MBBA. Fundamental regularities are identified in the behavior of the microwave dielectric permittivity of samples in electric and magnetic fields. It is shown that the minimum of the high-frequency dielectric loss in liquid crystals correspond to a situation in which the long axes of the molecules are oriented parallel to the direction of the microwave electric field. (C) 1998 American Institute of Physics. [S1063-7842(98)02201-6].

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Публикация на русском языке Исследование СВЧ диэлетрической проницаемости жидких кристалов в электрических и магнитных полях [Текст] / Б. А. Беляев, Н. А. Дрокин, В. Ф. Шабанов, В. Н. Шепов // Журнал технической физики. - 1998. - Т. 68 Вып. 1. - С. 117-122

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Dept, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirenskii Physics Institute, Siberian Department, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Shepov, V. N.; Шепов, Владимир Николаевич
}
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Behavior of high-friequency dielectric spectra of liquid crystals nCB and nOCB / B. A. Belyaev, N. A. Drokin, V. F. Shabanov, V. N. Shepov // Proc. of SPIE. - 2002. - Vol. 4759. - P. 282-284 . - ISSN 0277-786X. - ISSN 978-0-819

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Shepov, V. N.; Шепов, Владимир Николаевич
}
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BELYAEV, B. A.
APPLICATION OF MICRO-STRIP RESONATORS IN THE INVESTIGATION OF DIELECTRIC-PROPERTIES OF LIQUID-CRYSTALS ON UHF / B. A. BELYAEV, N. A. DROKIN, V. N. SHEPOV // Zhurnal Tek. Fiz. - 1995. - Vol. 65, Is. 2. - P. 189-197. - Cited References: 14 . - ISSN 0044-4642

РУБ Physics, Applied

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Доп.точки доступа:
DROKIN, N. A.; SHEPOV, V. N.
}
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Belyaev, B. A.
Dielectric and optical properties of a 5-propyl-2-(p-cyanophenyl)-pyridine liquid crystal / B. A. Belyaev, N. A. Drokin, V. F. Shabanov // Phys. Solid State. - 2003. - Vol. 45, Is. 4. - P. 797-801, DOI 10.1134/1.1569024. - Cited References: 12 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
DECIMETER WAVELENGTH RANGE
   SERIES
   SPECTRA
   5CB
Аннотация: The temperature dependences of the dielectric and optical parameters for a 5-propyl-2-(p-cyanophenyl)-pyridine (3CP) liquid crystal are investigated in the vicinity of the nematic-isotropic phase transition. The dielectric spectra of the 3CP compound in the crystalline, nematic, and isotropic phases are measured in the frequency range 1-1000 MHz, and the Debye approximations of the measured spectra are obtained. Analysis of the dependence of the static permittivity on the director orientation with respect to the direction of the electric pump field demonstrates that the angle between the dipole moment and the long axis of the molecule is approximately equal to 15degrees. (C) 2003 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
}
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Belyaev, B. A.
Dielectric relaxation of trans-4-propyl-(4-cyanophenyl)-cyclohexane liquid crystals / B. A. Belyaev, N. A. Drokin, V. F. Shabanov // Phys. Solid State. - 2004. - Vol. 46, Is. 3. - P. 579-583, DOI 10.1134/1.1687882. - Cited References: 11 . - ISSN 1063-7834
Аннотация: The frequency dependences of the permittivity of a trans-4-propyl-(4-cyanophenyl)-cyclohexane (3PCH) liquid crystal in the nematic phase are measured in the frequency range 1-2000 MHz for different orientations of the director of liquid-crystal molecules with respect to the polarization of an ac electric field. The temperature dependences of the dielectric and optical characteristics are compared in the range of the transition from the nematic phase to the isotropic liquid phase. The dielectric spectra are approximated numerically, and the times of dipole relaxation upon rotation of the molecules about the short and long axes are determined. It is demonstrated that intramolecular motions make a significant contribution to the relaxation. The activation enthalpies are calculated. (C) 2004 MAIK "Nauka / Interperiodica".

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Публикация на русском языке Беляев, Борис Афанасьевич. Диэлектрическая релаксация жидкого кристалла транс-4-пропил(4-цианфенил) циклогексан [Текст] / Б. А. Беляев, Н. А. Дрокин, В. Ф. Шабанов // Физ. тверд. тела. - 2004. - Т. 46 Вып. 3. - С. 559-562

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
}
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Belyaev, B. A.
Distribution function of relaxation times for a 4-n-pentyl-4 '-cyanobiphenyl liquid crystal / B. A. Belyaev, N. A. Drokin, V. F. Shabanov // Phys. Solid State. - 2005. - Vol. 47, Is. 9. - P. 1791-1796, DOI 10.1134/1.2045369. - Cited References: 15 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
DIELECTRIC-RELAXATION
SPECTRA
INVERSION
Аннотация: The distribution function of relaxation times is reconstructed from the dielectric loss spectrum measured over a wide range of frequencies for a 4-n-pentyl-4'-cyanobiphenyl (5CB) liquid crystal. It is demonstrated that the distribution function for the isotropic and nematic phases is asymmetric in shape. Comparison shows that the reconstructed distribution function is in qualitative agreement with similar functions that are analytically derived from the Cole-Davidson and Havriliak-Negami empirical equations. The specific features observed in the behavior of the distribution function with a variation in the angle between the direction of polarization of a microwave electric field and the director of the liquid-crystal molecules are analyzed. A complex dependence of the permittivity for the liquid crystal in the range of ultrahigh frequencies is explained in terms of additional relaxation mechanisms associated with different motions of molecular fragments of alkyl chains. (c) 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
}
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Belyaev, B. A.
Impedance spectra of thin permalloy films with a nanoisland structure / B. A. Belyaev, N. A. Drokin // Phys. Solid State. - 2012. - Vol. 54, Is. 2. - P. 360-367, DOI 10.1134/S1063783412020084. - Cited References: 20. - This study was supported by the Russian Federal Targeted Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia in 2009-2013," the Siberian Branch of the Russian Academy of Sciences (Integration research project no. 5), and the Presidium of the Russian Academy of Sciences (project no. 21.1). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CAPACITANCE
Аннотация: The behavior of the impedance spectra of island permalloy films prepared through vacuum evaporation onto optically polished glass-ceramic substrates has been investigated in the frequency range from 0.0001 to 100 MHz. A resistor-capacitor model of the films has been developed and the model parameters, for which there is a good agreement with experimental data on the frequency dependences of the real and imaginary components of the impedance, have been determined. The specific features in the behavior of the electrical and physical characteristics with variations in the thickness of the sample and the gap between the measuring electrodes have been investigated. It has been found that the relative permittivity of the films under investigation reaches values E similar to 10(7)-10(8). The structural relaxation times have been calculated.

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Публикация на русском языке Беляев, Борис Афанасьевич. Спектры импеданса тонких пермаллоевых пленок с наноостровковой структурой [Текст] / Б. А. Беляев, Н. А. Дрокин // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 2. - С. 340-346

Держатели документа:
[Belyaev, B. A.
Drokin, N. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Belyaev, B. A.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Беляев, Борис Афанасьевич
}
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Belyaev, B. A.
Impedance spectroscopy investigation of electrophysical characteristics of the electrode-liquid crystal interface / B. A. Belyaev, N. A. Drokin // Phys. Solid State. - 2015. - Vol. 57, Is. 1. - P. 181-187, DOI 10.1134/S1063783415010060. - Cited References:22. - This study was supported by the Siberian Branch of the Russian Academyof Sciences (integration project no. 109). . - ISSN 1063. - ISSN 1090-6460. -

РУБ Physics, Condensed Matter
Рубрики:
DIELECTRIC-PROPERTIES
CONDUCTIVITY
Аннотация: The behavior of frequency dependences of the impedance of a capacitive measuring cell with a liquid crystal has been investigated in the frequency range from 10−1 to 105 Hz. A method for determining electrophysical characteristics of the liquid crystal in the bulk and at the liquid crystal-metal electrode interface has been proposed and tested for liquid crystals of the alkyl cyanobiphenyl series, which are doped with ionic surfactants. The method is based on the use of an equivalent electrical circuit, which makes it possible to approximate the impedance spectra with the required accuracy, and also on the determination of the frequency at the singular point in the impedance spectra, at which the reactive component of the electric current flowing through the liquid-crystal cell is negligible compared to the active component.

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Публикация на русском языке Беляев, Борис Афанасьевич. Исследование электрофизических характеристик границы электрод–жидкий кристалл методом импедансной спектроскопии [Текст] / Б. А. Беляев, Н. А. Дрокин // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2015. - Т. 57 Вып. 1. - С. 170-175

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Беляев, Борис Афанасьевич; Siberian Branch of the Russian Academy of Sciences [109]
}
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Belyaev, B. A.
Impedance spectroscopy investigation of liquid crystals doped with ionic surfactants / B. A. Belyaev, N. A. Drokin, A. N. Maslennikov // Phys. Solid State. - 2014. - Vol. 56, Is. 7. - P. 1455-1462, DOI 10.1134/S106378341407004X. - Cited References: 20. - This study was supported by the Siberian Branch of the Russian Academy of Sciences (integration project no. 109). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter

Аннотация: The effect of a direct-current (dc) electric field on the electrophysical characteristics of nematic liquid crystals of the alkyl cyanobiphenyl series nCB (n = 6-8) and the multicomponent liquid-crystal mixture MB-1, which are doped with ionic surfactants, has been investigated using impedance spectroscopy. It has been found that the impedance spectra depend substantially on the dc bias voltage applied to the sample. The approximation of the measured spectra with specially developed equivalent circuits of the measuring cell with a sample has made it possible to determine the capacitance of the electric double layer and the electrical conductivity of the samples, as well as the mobility, concentration, and diffusion coefficient of the ions. It has been shown that a region of the space charge is formed in the frequency range f ˂ 100 Hz near the electrodes of the measuring cell with a liquid-crystal sample, which leads to an increase in the active (resistive) and reactive (capacitive) components of the impedance.

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Публикация на русском языке Беляев, Борис Афанасьевич. Исследование методом импедансной спектроскопии допированных ионным сурфактантом жидких кристаллов [Текст] / Б. А. Беляев, Н. А. Дрокин, А. Н. Масленников // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2014. - Т. 56 Вып. 7. - С. 1403–1410

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Maslennikov, A. N.; Масленников, Алексей Николаевич; Беляев, Борис Афанасьевич; Siberian Branch of the Russian Academy of Sciences [109]
}
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10.

Belyaev, B. A.
Impedance spectroscopy study of the electrical properties of cation-substituted barium hexaaluminate ceramics / B. A. Belyaev, N. A. Drokin, V. A. Poluboyarov // Phys. Solid State. - 2018. - Vol. 60, Is. 2. - P. 274-280, DOI 10.1134/S1063783418020063. - Cited References:18 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
DIELECTRIC-RELAXATION
LIQUID-CRYSTALS
SPECTRA
Аннотация: We report on the behavior of frequency and temperature dependences of the impedance of a measuring cell in the form of a parallel-plate capacitor filled with barium hexaaluminate ceramics with four aluminum cations replaced by iron (BaO · 2Fe2O3 · 4Al2O3). The measurements have been performed in the frequency range of 0.5–108 Hz at temperatures of 20-375°C. A technique for determining the electrical properties of the investigated ceramics is proposed, which is based on an equivalent electric circuit allowing the recorded impedance spectra to be approximated with sufficiently high accuracy. The established spectral features are indicative of the presence of two electric relaxation times different from each other by three orders of magnitude. This fact is explained by the difference between the charge transport processes in the bulk of crystallites and thin intercrystallite spacers, for which the charge activation energies have been determined.

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Публикация на русском языке Беляев, Борис Афанасьевич. Исследование электрофизических характеристик катион-замещенной керамики гексаалюмината бария методом импедансной спектроскопии [Текст] / Б. А. Беляев, Н. А. Дрокин, В. А. Полубояров // Физ. тверд. тела. - 2018. - Т. 60 Вып. 2. - С. 269–275

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC SB RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Poluboyarov, V. A.; Беляев, Борис Афанасьевич
}
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11.

Belyaev, B. A.
Reconstruction of the distribution function of relaxation times for 7CB and 7OCB liquid crystals from dielectric spectra / B. A. Belyaev, N. A. Drokin, V. F. Shabanov // Phys. Solid State. - 2006. - Vol. 48, Is. 5. - P. 973-978, DOI 10.1134/S106378340605026X. - Cited References: 16 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
DECIMETER WAVELENGTH RANGE
FEATURES
Аннотация: A technique for reconstructing the distribution function of relaxation times from the dielectric spectra measured over a wide range of frequencies is proposed and tested using 7CB and 7OCB liquid crystals as examples. The objective function, which is the sum of the squares of the differences between the calculated and measured permittivities, is minimized with the Mathcad program package. It is demonstrated that, in the case of parallel orientation of the molecular director with respect to the polarization of the ac electric field, the distribution function of relaxation times is consistent with the Debye relaxation model; however, there are insignificant deviations in the short-time interval corresponding to the high-frequency portion of the dielectric spectrum. For perpendicular orientation of the director, the distribution function of relaxation times exhibits specific features that are most pronounced for the 7OCB liquid crystal and probably reflect intramolecular motions of the rigid core and fragments of the alkyl chain.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
}
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12.

Belyaev, B. A.
Temperature dependence of the dielectric characteristics of a 5CB liquid crystal within the relaxation region / B. A. Belyaev, N. A. Drokin, V. F. Shabanov // Phys. Solid State. - 2005. - Vol. 47, Is. 4. - P. 765-768, DOI 10.1134/1.1913994. - Cited References: 9 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SERIES
Аннотация: The temperature dependence of the real part of the permittivity of a 4-n-pentyl-4-cyanobiphenyl liquid crystal was studied within a broad frequency range of 30-5000 MHz and in the temperature interval 20-60 degrees C in the vicinity of the nematic-isotropic-liquid phase transition. It was established that the dispersion of the longitudinal component of the permittivity can be fitted well by a sum of two Debye terms with strongly differing relaxation times. The temperature and frequency dependence of the shorter relaxation time was determined for which the best fit between calculations and experiment was achieved. (C) 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
}
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13.

BT-30 Ceramic Electrophysical Properties / N. A. Drokin, V. S. Kiiko, A. V. Pavlov, A. I. Malkin // Refract. Ind. Ceram. - 2020. - Vol. 61, Is. 3. - P. 341-348, DOI 10.1007/s11148-020-00484-2. - Cited References: 12 . - ISSN 1083-4877. - ISSN 1573-9139
Кл.слова (ненормированные):
(BeO + TiO2)-ceramic -- electrophysical properties -- electrical resistance activation energy
Аннотация: A total complex resistance (impedance) method is used to study the electrophysical characteristics of (BeO + TiO2)-ceramics modified with TiO2 micro- and nanoparticles in an amount of 30 wt.% (BT-30). Dispersion of the actual ε′ and imaginary ε′′ components of the dielectric permittivity component and specific conductivity in the frequency range from 100 Hz to 100 MHz from room temperature to the boiling point of liquid nitrogen are determined. High values of ε′ and ε′′ in the low-frequency range are typical for structurally inhomogeneous materials due to the accumulation of electric charges at the surface and within microcrystals. Two dielectric relaxation processes associated with electrical conductivity within the body and at the surface of ceramics are detected for the first time. An increase in conductivity with an increase in the microwave field frequency above 1 MHz is explained by the appearance of a current relaxation component. The activation energy of the static resistance of ceramic specimens is determined as a function of the reciprocal temperature that depends little on the weight content of TiO2 nanoparticles and varies in the range of 0.024 – 0.10 eV This also confirms the existence of two independent conduction processes, weakly dependent on the nanoparticle content in the ceramic composition. With placement of ceramic in a high-frequency electric field, spatial charges are formed, the field of which contributes to creation of additional polarization and dielectric losses.

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Держатели документа:
FGBOU VO Academician M. F. Reshetnev Siberian Aerospace University, Krasnoyarsk, Russia.
FGBUN Federal Research Center, Krasnoyarsk Scientific Center of the Siberian Section, Russian Academy of Sciences, Krasnoyarsk, Russia.
FGAOU VO Ural Federal University, Ekaterinburg, Russia.
FGAOU VO Siberian Federal University, Krasnoyarsk, Russia.

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Kiiko, V. S.; Pavlov, A. V.; Malkin, A. I.
}
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14.

CHZHAN, A. V.
THE ELECTRIC-FIELD EFFECT ON THE MAGNETIZATION OF CDCR2SE4 FILMS / A. V. CHZHAN, N. A. DROKIN, P. D. KIM // Fiz. Tverd. Tela. - 1986. - Vol. 28, Is. 5. - P. 1583-1585. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
DROKIN, N. A.; KIM, P. D.
}
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15.

Composites based on superhigh-molecular poly(ethylene) and carbon nanostructures / G. N. Churilov, I. V. Osipova, A. N. Maslennikov [et al.] ; // Joint International Conference "Advanced Carbon Nanostructures" (ACN 2011) : Abstracts. - 2011. - Ст. P6.08. - P324

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Churilov, G. N.; Чурилов, Григорий Николаевич; Osipova, I. V.; Осипова, Ирина Владимировна; Maslennikov, A. N.; Масленников, Алексей Николаевич; Glushchenko, G. A.; Глущенко, Гарий Анатольевич; Drokin, N. A.; Дрокин, Николай Александрович; "Advanced Carbon Nanostructures", Joint International Conference(2011 ; July ; 4-8 ; St Petersburg); Красноярский государственный педагогический университет им. В.П. Астафьева
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16.

Dielectric anisotropy of 5CB liquid crystal in a decimeter wavelength range / B. A. Belyaev [et al.] // Phys. Solid State. - 2000. - Vol. 42, Is. 3. - P. 577-579, DOI 10.1134/1.1131251. - Cited References: 7 . - ISSN 1063-7834

РУБ Physics, Condensed Matter

Аннотация: Parallel and perpendicular components of the dielectric constant for 5CB nematic liquid crystal are measured in a relaxation region. Two frequencies f(1) approximate to 30 and f(2) approximate to 350 MHz are determined at which the inversion of the dielectric anisotropy sign is observed. It is shown that the observed sizable high-frequency shift of f(2) with respect to the value calculated according the Debye theory is caused by the dielectric resonance near the relaxation region. (C) 2000 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Shepov, V. N.; Шепов, Владимир Николаевич
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17.

Dielectric anisotropy of nematic 4-pentil-4'-cyanobiphenyl / B. A. Belyaev, N. A. Drokin, V. F. Shabanov, V. N. Shepov // Molecular crystals and liquid crystals science and technology : section A- Molecular crystals and liquid crystals. - 2001. - Vol. 366, Is. 1. - P. 305-312DOI 10.1080/10587250108023973

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Держатели документа:
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Shepov, V. N.
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18.

Dielectric properties of liquid crystals in polycapillary matrices / B. A. Belyaev [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 6. - P. 1315-1322, DOI 10.1134/S1063783410060314. - Cited References: 24. - This study was supported by the Council on Grants from the President of the Russian Federation (grant no. 3818.2008.3) and the Siberian Branch of the Russian Academy of Sciences (Integration Project no. 5) and performed within the framework of the State Contract (no. 02.740.11.0220). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MOLECULAR-SIEVES
   SILICA AEROGEL
   POROUS-GLASS
   MEMBRANES
   NMR
   8CB
Аннотация: This paper reports on the results of investigations into the dielectric properties of liquid crystals embedded in polycapillary matrices and describes a technique for their measurement. It has been revealed that the chemical structure of the rigid core and the length of mobile alkyl groups of liquid-crystal molecules of the alkylcyanobiphenyl group substantially affect the equilibrium configuration of the liquid-crystal director in capillaries. The reorientation of liquid-crystal molecules embedded in capillaries in the nematic phase under the influence of an external magnetic field has been investigated.

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Держатели документа:
[Belyaev, B. A.
Drokin, N. A.
Shabanov, V. F.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Kumakhov, M. A.] Inst Xray Opt, Moscow 125315, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Institute of X-Ray Optics, ul. Chasovaya 28, Moscow 125315, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Kumakhov, M. A.; Shabanov, V. F.; Шабанов, Василий Филиппович
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19.

Dielectric properties of liquid crystals of the cyano derivative compounds with different fragments in the molecular core / B. A. Belyaev [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 3. - P. 574-578, DOI 10.1134/1.1687881. - Cited References: 13 . - ISSN 1063-7834
Аннотация: This paper reports on the results of investigations into the influence of variations in the chemical composition of the aromatic core of cyano-containing molecules of liquid crystals on their dielectric properties in the frequency range 1-2000 MHz. It is shown that the dispersion of the longitudinal permittivity is adequately described by the sum of two Debye processes with different weighting factors and relaxation times. The frequency dependence of the transverse permittivity is well approximated by the Debye process with a continuous distribution of relaxation times in a specified range. It is established that the replacement of one benzene ring in the biphenyl core of the 5CB liquid-crystal molecule by a cyclohexane (or bicyclooctane) fragment leads to a considerable decrease in both relaxation times for the longitudinal permittivity, a change in the low-frequency limit of the relaxation time range for the transverse permittivity, and the evolution of the frequency dependence of the dielectric anisotropy. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Baranova, V. A.
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20.

DOMAIN-STRUCTURE IN FILMS OF MAGNETIC CDCR2SE4 SEMICONDUCTOR / A. V. CHZHAN [и др.] // Fiz. Tverd. Tela. - 1984. - Vol. 26, Is. 4. - P. 1177-1179. - Cited References: 4 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
CHZHAN, A. V.; KIM, P. D.; DROKIN, N. A.; TURPANOV, I. A.
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