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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Drokin N. A.
Заглавие : Impedance spectra of thin permalloy films with a nanoisland structure
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 2. - P.360-367. - ISSN 1063-7834, DOI 10.1134/S1063783412020084
Примечания : 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).
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Serzhantov A. M., Tyurnev V. V., Leksikov, Al. A.
Заглавие : Miniature bandpass filter with a wide stopband up to 40F0
Место публикации : Microw. Opt. Technol. Lett.: Wiley-Blackwell, 2012. - Vol. 54, Is. 5. - P.1117-1118. - 2. - ISSN 0895-2477, DOI 10.1002/mop.26751
Примечания : Cited References: 13. - This work was supported in part by the Siberian Branch of the Russian Academy of Sciences under Interdisciplinary integration project No 5 and Federal Target Program "Research and Research-Pedagogical Personnel of Innovation Russia 2009-2013.''
Предметные рубрики: STEPPED IMPEDANCE RESONATOR
OPEN-LOOP RESONATOR
BANDWIDTH
COMBLINE
DESIGN
Coaxial resonators
High selectivity
Metal case
Miniature filter
Narrow band filter
Ultra-wide stopband
Wide stopband
Bandpass filters
Frequency response
Resonators
Ключевые слова (''Своб.индексиров.''): bandpass filter--miniature filter--coaxial resonator--quasi-lumped resonator--ultra wide stopband
Аннотация: A 243-MHz narrowband filter with high selectivity performance has been designed. The filter comprises two electromagnetically coupled quasi-lumped resonators placed into a metal case. Each resonator consists of a tubular capacitor connected in series between two tubular conductors. The measured frequency response of the fabricated filter is presented.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N. V., Tarasov A. S., Eremin E. V., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Impedance and magnetoimpedace in a hybrid structure Fe/SiO[[d]]2[[/d]]/n-Si
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 84. - ISBN 978-5-7444-3124-2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Drokin N. A., Kokourov G. A., Glushchenko G. A., Osipova I. V., Maslennikov A. N., Churilov G. N.
Заглавие : Effect of electrode material on impedance spectra of metal-polyethylene structures with carbon nanotubes
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 4. - P.844-848. - ISSN 1063-7834, DOI 10.1134/S1063783412040063
Примечания : Cited References: 15. - This study was supported by the Ministry of Education and Science of the Russian Federation within the framework of the Russian Federal Targeted Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia in 2009-2011" and the Presidium of the Russian Academy of Sciences (integration project no. 27.1).
Предметные рубрики: SPECTROSCOPY
Аннотация: The effect of an electrode material on electrical properties of a composite material based on super-high-molecular polyethylene (SHMPE) filled with carbon nanotubes has been studied using impedance spectroscopy. Using the method of replacing the sample by an equivalent electric circuit, it has been found that, depending on the electrode material, a blocking barrier with high active resistance and a space charge region adjacent to it arise in the interface region. It has been shown that the barrier height is controlled by surface electronic states of SHMPE and weakly depends on the electron work function of metal electrodes (Bardeen barrier). The characteristic times of electrical relaxation characterizing bulk and interface regions of the composite under study have been determined.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Беляев, Борис Афанасьевич, Масленников, Алексей Николаевич, Дрокин, Николай Александрович
Заглавие : Электрическая релаксация и диэлектрические потери в жидких кристаллах на свч
Место публикации : Изв. вузов. Физика. - 2013. - Т. 56, № 8/2. - С. 291-293
Примечания : Работа выполнена при частичной поддержке гранта РФФИ № 12-02-12008, ФЦП «Научные и научно-педагогическиекадры инновационной России 2009−2013» и интеграционного проекта СО РАН № 109.
Ключевые слова (''Своб.индексиров.''): диэлектрическая проницаемость--жидкие кристаллы--дисперсия--импеданс--permittivity --liquid crystals--impedance--dispersion
Аннотация: Проведена аппроксимация спектров диэлектрической проницаемости жидкого кристалла 7СВ с использованием метода трансформации спектра диэлектрических потерь в электрический импедансный спектр, позволяющий сопоставить потери с эквивалентной электрической схемой жидкокристаллической ячейки.Carried approximation permittivity spectra of liquid crystal 7CB using the transformation of the dielectric losses in the electrical impedance spectrum. It is allow to compare the losses with equivalent electrical circuit the liquid crystal cell.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Serzhantov A. M., Tyurnev V. V., Leksikov Al. A., Bal'va Y. F.
Заглавие : Miniature bandpass microwave filter with interference suppression by more than 100 dB in a wide rejection band
Коллективы : Ministry of Education and Science of the Russian Federation [14.513.11.0010]; federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia" [16.740.11.0470, 14.V37.21.1103, 14.V37.21.0070]; Siberian Branch, Russian Academy of Sciences [109]
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2013. - Vol. 39, Is. 8. - P.690-693. - ISSN 1063-7850, DOI 10.1134/S1063785013080026
Примечания : Cited References: 17. - This study was supported by the Ministry of Education and Science of the Russian Federation (state contract no. 14.513.11.0010), the federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia (2009-2013)" (state contract no. 16.740.11.0470), agreement nos. 14.V37.21.1103 and 14.V37.21.0070, and Integration Project no. 109 (Siberian Branch, Russian Academy of Sciences).
Предметные рубрики: STEPPED-IMPEDANCE RESONATORS
MICROSTRIP FILTERS
STOPBAND
FEATURES
DESIGN
Аннотация: A new planar resonator design in which a single conductor is replaced by three parallel stripe conductors located one above the other on a suspended two-layer substrate is proposed. It is shown that the resonator longitudinal sizes can be significantly reduced and, at the same time, the resonator intrinsic Q factor and frequencies of higher oscillation modes can be increased. A fourth-order bandpass filter with a central frequency of the transmission band (relative width 5%) of 1 GHz has been developed and fabricated. This filter has a -100-dB rejection band up to frequencies exceeding 10 GHz. The filter is enclosed in a metallic case with an internal size of 38 x 12 x 7.5 mm. It is shown that a similar filter fabricated in accordance with low-temperature cofired ceramic (LTCC) technology has a -40-dB rejection band up to 30 GHz, with sizes reduced to 5.0 x 4.25 x 1.24 mm.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Drokin N. A., Maslennikov A. N.
Заглавие : Impedance spectroscopy investigation of liquid crystals doped with ionic surfactants
Коллективы : Siberian Branch of the Russian Academy of Sciences [109]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 56, Is. 7. - P.1455-1462. - ISSN 1063-7834, DOI 10.1134/S106378341407004X. - ISSN 1090-6460
Примечания : Cited References: 20. - This study was supported by the Siberian Branch of the Russian Academy of Sciences (integration project no. 109).
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Tarasov A. S., Smolyakov D. A., Gustaitsev A. O., Balashov V. V., Korobtsov V .V.
Заглавие : The bias-controlled giant magnetoimpedance effect caused by the interface states in a metal-insulator-semiconductor structure with the Schottky barrier
Коллективы : Russian Foundation for Basic Research [14-02-00234-a, 14-02-31156]; Presidium of the Russian Academy of Sciences [20.8]; Russian Ministry of Education and Science [02.G25.31.0043.]
Место публикации : Appl. Phys. Lett.: American Institute of Physics, 2014. - Vol. 104, Is. 22. - Ст.222406. - ISSN 0003-6951, DOI 10.1063/1.4881715. - ISSN 1077-3118
Примечания : Cited References: 20. - This study was supported by the Russian Foundation for Basic Research, Project Nos. 14-02-00234-a and 14-02-31156; the Presidium of the Russian Academy of Sciences, program Quantum Mesoscopic and Disordered Structures, Project No. 20.8; and the Russian Ministry of Education and Science, Project No. 02.G25.31.0043.
Предметные рубрики: MAGNETO-IMPEDANCE
FILMS
Аннотация: We demonstrate that ferromagnetic metal/insulator/semiconductor hybrid structures represent a class of materials with the giant magnetoimpedance effect. In a metal-insulator-semiconductor diode with the Schottky barrier fabricated on the basis of the Fe/SiO2/n-Si structure, a drastic change in the impedance in an applied magnetic field was found. The maximum value of this effect was observed at temperatures of 10–30 K in the frequency range of 10 Hz–1 MHz where the ac magnetoresistance and magnetoreactance ratios exceeded 300% and 600%, respectively. In the low-frequency region (<1 kHz), these ratios could be controlled in wide range by applying bias to the device. The main contribution to the impedance when measured at temperatures corresponding to the strongest magnetic-field sensitivity comes from the interface states localized near the SiO2/n-Si interface and the processes of their recharging in an applied ac voltage. The applied magnetic field changes the energy structure of the interface states, thus affecting the processes of the charging dynamics.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Dorofeev N. V., Bondarev I. A., Tarasov A. S., Volkov N. V.
Заглавие : Impedance and magnetoimpedance in Mn/SiO2/P-Si HYBRID structures
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова
Место публикации : Moscow int. Symp. on Magnet. (MISM-2014): Book of abstracts. - 2014. - Ст.1PO-K-3. - P.536. - ISBN 978-5-91978-025-0
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Drokin N. A.
Заглавие : Impedance spectroscopy investigation of electrophysical characteristics of the electrode-liquid crystal interface
Коллективы : Siberian Branch of the Russian Academy of Sciences [109]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 1. - P.181-187. - ISSN 1063, DOI 10.1134/S1063783415010060. - ISSN 10906460(eISSN)
Примечания : Cited References:22. - This study was supported by the Siberian Branch of the Russian Academyof Sciences (integration project no. 109).
Предметные 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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