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    Экспериментальное и теоретическое исследование влияния на высокочастотные свойства тонких магнитных пленок искусственной текстуры подложек / Б. А. Беляев [и др.] // Изв. вузов. Физика. - 2013. - Т. 56, № 8/2. - С. 263-266. - Работа выполнена при финансовой поддержке Минобрнауки РФ, госконтракт № 14.513.11.0010, ФЦП «Научные и научно-педагогические кадры инновационной России 2009−2013» и гранта РФФИ № 12-02-12008-офи_м
   Перевод заглавия: Experimental and theoretical investigation of effect of the artificial texture in substrate on the high-frequency properties of thin magnetic films
Кл.слова (ненормированные):
текстура подложки -- тонкие магнитные пленки -- ферромагнитный резонанс -- микромагнитное моделирование -- artificial texture in substrate -- magnetic films -- ferromagnetic resonance -- numerical micromagnetic simulation
Аннотация: С помощью сканирующего спектрометра ферромагнитного резонанса (ФМР) получены экспериментальные зависимости резонансного поля и ширины линии ФМР тонких пермаллоевых магнитных пленок, осажденных в вакууме на подложки с искусственно созданной текстурой. Текстура получена нанесением алмазным резцом параллельных рисок на стеклянные подложки с периодичностью от 5 до 200 мкм. Обнаружено, что наличие текстуры приводит к существенному росту резонансного поля и ширины линии ФМР, когда внешнее поле направлено ортогонально рискам. На основе численного микромагнитного моделирования дано объяснение природы наблюдаемых в магнитных пленках эффектов.
Using the scanning spectrometer of ferromagnetic resonance (FMR) the experimental dependences of the resonance field and FMR line width of thin permalloy magnetic films, which were deposited in vacuum on the substrate with an artificial texture, were obtained. The texture was produced by putting parallel grooves using a diamond cutter on glass substrates with period from 5 to 200 μm. It was found that the presence of the texture was leading to an essential increase of th resonance field and FMR line width, when the external field was directed orthogonal to the grooves. On the base of a numerical micromagnetic simulation the explanation of nature of observable in thin magnetic films effects was given.

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Беляев, Борис Афанасьевич; Belyaev B. A.; Лексиков, Александр Александрович; Leksikov Al. A.; Изотов, Андрей Викторович; Izotov A.V.; Сержантов, Алексей Михайлович; Serzhantov A.M.; Соловьев, Платон Николаевич; Лемберг, Константин Вячеславович; Lemberg, K.V.
}
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    Temperature- and texture-dependent dielectric model for moist soils at 1.4 GHz / V. L. Mironov [и др.] // Geosci. and Remote Sensing Lett., IEEE. - 2013. - Vol. 10, Is. 3. - P. 419 - 423DOI 10.1109/LGRS.2012.2207878
   Перевод заглавия: Температурно и гранулометрически зависимая диэлетрическая модель влажных почв на частоте 1,4 ГГц
Аннотация: In this letter, a monofrequent dielectric model for moist soils taking into account dependences on the temperature and texture is proposed, in the case of an electromagnetic frequency equal to 1.4 GHz. The proposed model is deduced from a more general model proposed by Mironov and Fomin (2009) that provides estimations of the complex relative permittivity (CRP) of moist soils as a function of frequency, temperature, moisture, and texture of soils. The latter employs the physical laws of Debye and Clausius-Mossotti and the law of ion conductance to calculate the CRP of water solutions in the soil. The parameters of the respective physical laws were determined by using the CRPs of moist soils measured by Curtis (1995) for a wide ensemble of soil textures (clay content from 0% to 76%), moistures (from drying at 105 °C to nearly saturation), temperatures (10 °C -40 °C), and frequencies (0.3-26.5 GHz). This model has standard deviations of calculated CRPs from the measured values equal to 1.9 and 1.3 for the real and imaginary parts of CRP, respectively. In the model proposed in this letter, the respective standard deviations were decreased to the values of 0.87 and 0.26. In addition, the equations to calculate the complex dielectric permittivity as a function of moisture, temperature, and texture were represented in a simple form of the refractive mixing dielectric model, which is commonly used in the algorithms of radiometric and radar remote sensing to retrieve moisture in the soil.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Toulouse 3, CNRS, Ctr Natl Etud Spatiales, Ctr Etud Spatiale BIOsphere,Inst Rech Dev, F-31401 Toulouse, France
INRA, F-33140 Villenave Dornon, France
Univ Bordeaux, CNRS, UMR, Lab Integrat Mat Syst, F-33405 Talence, France

Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Kerr, Y.; Wigneron, J.-P.; Косолапова, Людмила Георгиевна; Kosolapova, L. G.; Demontoux, F.
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Temperature and texture dependent dielectric model of MOIST soils at the SMOS frequency / V. L. Mironov [и др.] // IEEE International Geoscience and Remote Sensing Symposium (IGRASS) : Proceedings. - Munich, 2012. - P. 1127-1129, DOI 10.1109/IGARSS.2012.6351350 . - ISBN 978-1-4673-1159-5
Аннотация: In this paper a single-frequent temperature and texture dependent dielectric model for moist soils is proposed. This model is designed for the frequency of 1.4 GHz at which the European sensor SMOS operates to monitor moisture of the Earth surface from space. Earlier, the dielectric model was created, that provides estimations of the complex dielectric constant of moist soils as a function of frequency, temperature, moisture and mineralogy of soils. This model was developed based on extensive measurements of the dielectric constant for a wide ensemble of soils (clay content from 0 to 76%), moistures (from zero to molecular moisture capacity), temperatures (10° C to 40° C), and frequencies (0.3 to 26.5 GHz). This model provides for fairly good accuracy. But, being cumbersome to account for frequency dependencies, the model is not always convenient for practical use at a single frequency. Exclusion of the frequency dependence allowed us to obtain a substantially more simple dielectric model to estimate the complex dielectric constant of soil at a single frequency of 1.4 GHz as a function of moisture, temperature, and clay content.

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Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Kerr, Y.; Wigneron, J.-P.; Kosolapova, L. G.; Косолапова, Людмила Георгиевна; Demontoux, F.; IEEE International Geoscience and Remote Sensing Symposium (2012 ; July ; 22-27 ; Munich, Germany)
}
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Thin magnetic films with artificial texture on substrate: Microwave properties / B. A. Belyaev [et al.] // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 233-236, DOI 10.4028/www.scientific.net/SSP.215.233. - Cited References: 9 . - ISSN 978-30383. - ISSN 1662-9779
Кл.слова (ненормированные):
Ferromagnetic resonance -- Micromagnetic simulation -- Nanopattering -- Thin magnetic films
Аннотация: Using the scanning spectrometer of ferromagnetic resonance (FMR) the experimental dependences of the resonance field and FMR line width of thin permalloy magnetic films, which were deposited in vacuum on the substrate with an artificial texture, were obtained. The texture was produced by engineering parallel grooves using a diamond cutter on glass substrates with period from 5 to 100 ?m. We found that the presence of the texture led to a considerable increase of the resonance field and FMR line width, when the external field was directed orthogonal to the grooves. By analyzing the results of a numerical micromagnetic simulation we explained the nature of the effects observed in the thin magnetic films. © (2014) Trans Tech Publications, Switzerland.

Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Belyaev, B. A.; Беляев, Борис Афанасьевич; Izotov, A. V.; Изотов, Андрей Викторович; Leksikov, Al. A.; Лексиков, Александр Александрович; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Lemberg, K. V.; Лемберг, Константин Вячеславович; Solovev, P. N.; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)
}
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Belyaev, B. A.
The effect of substrate artificial texture on high frequency properties of thin magnetic films / B. A. Belyaev, A. V. Izotov, P. N. Solovev // International symposium «Magnetics and optics research» MORIS-2013 : Technical digest. - 2013. - P. 54-55

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Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Беляев, Борис Афанасьевич; Magnetics and Optics Research International Symposium(2013 ; Dec. 2-5 ; Omiya Sonic City, Saitama, Japan)
}
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Characterization and magnetotransport properties of textured Fe3O4 films / A. S. Tarasov [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. O10.21. - P. 465. - References: 2. - This work was partially supported by RFBR project no. 14-02-00234, the RAS «Far East» Program No 0262-2015-0057 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
magnetite -- texture film -- spin-dependent transport

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Volochaev, M. N.; Волочаев, Михаил Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Korobtsov, V .V.; Коробцов, Владимир Викторович; Balashev, V. V.; Балашев В. В.; Vikulov, V. A.; Solovyov, L. A.; Соловьев, Леонид Александрович; Volkov, N. V.; Волков, Никита Валентинович; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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Director configurations in nematic droplets with tilted surface anchoring / M. N. Krakhalev [et al.] // Liq. Cryst. - 2017. - Vol. 44, Is. 2. - P. 355-363, DOI 10.1080/02678292.2016.1205225. - Cited References:32. - This work was supported by Russian Foundation for Basic Research (RFBR) under Grants 15-02-06924 and 16-32-00164 and Siberian Branch of the Russian Academy of Sciences (SB RAS) under Complex Program [II.2P 0358-2015-0010], and V.S.S. acknowledges financial support from RFBR [16-32-60036]. . - ISSN 0267-8292. - ISSN 1366-5855

РУБ Chemistry, Multidisciplinary + Crystallography + Materials Science, Multidisciplinary
Рубрики:
DISPERSED LIQUID-CRYSTALS
   RIGIDLY FIXED POLES
   ELECTRIC-FIELD
   POLYMER
Кл.слова (ненормированные):
Polymer dispersed liquid crystal -- nematic droplet -- director -- configuration -- boundary conditions -- surface anchoring strength -- optical -- texture
Аннотация: The polymer dispersed nematic liquid crystal (LC) with the tilted surface anchoring has been studied. The droplet orientational structures with two point surface defects – boojums and the surface ring defect – are formed within the films. The director tilt angle α = 40° ± 4° at the droplet interface and LC surface anchoring strength Ws ~ 10–6 (J m−2) have been estimated. The bipolar axes within the studied droplets of oblate ellipsoidal form can be randomly oriented are oriented randomly relatively to the ellipsoid axes as opposed to the droplets with homeotropic and tangential anchoring.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Russian Foundation for Basic Research (RFBR) [15-02-06924, 16-32-00164]; Siberian Branch of the Russian Academy of Sciences (SB RAS) [II.2P 0358-2015-0010]; RFBR [16-32-60036]
}
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Temperature and texture dependent spectroscopic dielectric model for frozen mineral soils at 0.1-15GHz / V. L. Mironov [et al.] // Progr. Electromag. Res. Symp. (PIERS) : Proceedings : IEEE, 2016. - P. 4754-4754, DOI 10.1109/PIERS.2016.7735742. - Cited References:2. - The work was supported by the Russian Science Foundation (grant No. 14-17-00656). . -

РУБ Engineering, Electrical & Electronic

Кл.слова (ненормированные):
Soil -- Dielectrics -- Temperature measurement -- Minerals -- Temperature dependence -- Dielectric measurement -- Frequency measurement

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Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Karavaysky, A. Yu.; Каравайский, Андрей Юрьевич; Molostov, I. P.; Молостов, Илья Петрович; Lukin, Y. I.; Лукин, Юрий Иванович; Kosolapova, L. G.; Косолапова, Людмила Георгиевна; Russian Science Foundation [14-17-00656]; Progress in Electromagnetics Research Symposium(37 ; 2016 ; Aug. ; 8-11 ; Shanghai, China)
}
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Transformation of cholesteric orientational structures and optical textures induced by the electric field–driven ionic modification of surface anchoring / V. S. Sutormin [et al.] // Bull. Russ. Acad. Sci. Phys. - 2017. - Vol. 81, Is. 5. - P. 602-604, DOI 10.3103/S1062873817050239. - Cited References: 8 . - ISSN 1062-8738
Кл.слова (ненормированные):
Cholesteric liquid crystals -- Liquid crystals -- Dc electric field -- Helical pitch -- Homeotropic alignment -- Ionic modification -- Liquid crystal cells -- Optical texture -- Orientational structure -- Surface-anchoring -- Electric fields
Аннотация: The reorientation of a cholesteric liquid crystal with a large helical pitch induced by the electric field–driven modification of surface anchoring is investigated. In the initial state, the liquid crystal cell has a homeotropic alignment of the director. An applied dc electric field produced a twisted homeoplanar structure of the cholesteric. © 2017, Allerton Press, Inc.

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Публикация на русском языке Трансформация ориентационных структур и оптических текстур холестерика, индуцированная электроуправляемой ионной модификацией поверхностного сцепления [Текст] / В. С. Сутормин [и др.] // Изв. РАН. Сер. физич. - 2017. - Т. 81 № 5. - С. 649-652

Держатели документа:
Kirensky Institute of Physics, Federal Research Center–Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sutormin, V. S.; Сутормин, Виталий Сергеевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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10.

    Temperature- and texture-dependent dielectric model for frozen and thawed mineral soils at a frequency of 1.4 GHz / V. L. Mironov [et al.] // Remote Sens. Environ. - 2017. - Vol. 200. - P. 240-249, DOI 10.1016/j.rse.2017.08.007. - Cited References: 27. - The study was supported by a grant from the Russian Foundation for Basic Research (project № 16-05-00572). . - ISSN 0034-4257
   Перевод заглавия: Температурно- и гранулометрически-зависимая диэлектрическая модель мерзлых и талых минеральных почв на частоте 1,4 ГГц
Кл.слова (ненормированные):
Frozen mineral soils -- Dielectric measurements -- Dielectric model -- Unfrozen bound water -- Moistened ice -- 1.4 GHz
Аннотация: A single-frequency dielectric model at 1.4 GHz for frozen mineral soils was developed, with the temperature and gravimetric clay content varying from − 1 to − 30°C and from 9.1 to 41.3%, respectively. The model is based on the refractive mixing dielectric model and the dielectric data measured for the three typical soils collected in the Yamal tundra. The refractive mixing dielectric model was applied to fit the measured dielectric data as a function of soil moisture at a number of fixed temperatures. As a result, the parameters of the developed model were derived as a function of temperature and texture. This set of parameters consists of the maximum gravimetric fraction of unfrozen bound water and the values of the complex refractive indexes relating to soil solids, unfrozen bound water, and moistened ice. The developed model for frozen mineral soils in conjunction with the previously developed by us dielectric model for thawed mineral soils is considered as an integral dielectric model which is applicable for permittivity calculations of soil in both thawed and frozen states. The developed integral dielectric model for frozen and thawed mineral soils was validated using the dielectric data for five measured soils, and the statistical errors were estimated in terms of the root mean square error and the determination coefficient. In addition, the only known in the literature dielectric model for frozen soils suggested by Zhang was validated based on dielectric data for soils measured in this research. The comparative analysis proved substantially better accuracy of predictions in the case of the developed model as compared to those related to the Zhang model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Russian Federation
Altai State University, Russian Federation

Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Kosolapova, L. G.; Косолапова, Людмила Георгиевна; Lukin, Y. I.; Лукин, Юрий Иванович; Karavaysky, A. Yu.; Каравайский, Андрей Юрьевич; Molostov, I. P.
}
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11.

    Frequency-, temperature-, and texture-dependent dielectric model for frozen and thawed arctic mineral soi / V. L. Mironov [et al.] // Progr. Electromag. Res. Symp. (PIERS) : Proceedings. - 2017. - P. 2546-2553DOI 10.1109/PIERS.2017.8262181. - Cited References: 15. - Present research was supported in the frame of project No. 16-45-242162 in the corporative program of the Russian foundation for basic research and Krasnoyarsk region government foundation for science and technology. It was also supported by the RAS Presidium Program “Arctika”, 2015– 2017 and program II.12.1. of the SB RAS basic researches.
   Перевод заглавия: Частотно-, температурно-, и минералогически-зависимая диэлектрическая модель мерзлых и влажных арктических минеральных почв
Аннотация: A simple single-frequency dielectric model for the set of frequencies which are 0.45, 1.26, 1.4, 1.6, 5.4, 6.9, 9.6, and 10.7 GHz for frozen mineral soils is developed. The model is based on the dielectric measurements of three typical soils (sandy loam, silt loam, and silty clay) at the temperature range from -1°C to -30°C. The measured data as a function of moisture were fitted with the refractive mixing dielectric model. The model parameters are maximum bound water fraction, and refractive indexes of soil solid, unfrozen bound water, and wet ice. In the result of fitting measured data, the model parameters were determined as a functions of soil type (clay content), and soil temperature. The error of the predicted values of the complex relative permittivity (CRP) of frozen soils relative to the measured ones was evaluated through determination coefficients, and root mean square error (RMSE). The values of RMSE are on the order of the dielectric measurement error itself. The proposed dielectric model can be applied in active and passive remote sensing techniques used in the cold regions.

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Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Molostov, I. P.; Lukin, Y. I.; Лукин, Юрий Иванович; Karavaysky, A. Yu.; Каравайский, Андрей Юрьевич; Fomin, S. V.; Фомин, Сергей Викторович; Progress in Electromagnetics Research Symposium(38 ; 2017 ; May, 22 - 25 ; St Petersburg, Russia)
}
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12.

    Anionic-cationic surfactant mixture providing the electrically controlled homeotropic surface anchoring of liquid crystals / M. N. Krakhalev [et al.] // J. Mol. Liq. - 2019. - Vol. 282: Suzdal Conference (2018, Suzdal, RUSSIA). - P. 57-62, DOI 10.1016/j.molliq.2019.02.132. - Cited References: 30. - The reported study was supported by the Belarusian Republican Foundation for Fundamental Research (project No X16P-110) and Russian Foundation for Basic Research (RFBR) (project No 16-53-00073). Mikhail N. Krakhalev and Vitaly S. Sutormin acknowledge financial support from RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (project No 18-42-243006). . - ISSN 0167-7322. - ISSN 1873-3166
   Перевод заглавия: Смесь анионного и катионного сурфактантов, обеспечивающая электроуправляемое гомеотропное поверхностное сцепление в жидких кристаллах

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
IONIC MODIFICATION
   TRANSITION
   DROPLETS
   CONFIGURATION
   LAYER
Кл.слова (ненормированные):
Polymer dispersed liquid crystal -- Nematic droplet -- Ionic surfactant -- Anchoring transition -- Director configuration -- Optical texture
Аннотация: In search of a substance able to function as an anionic surfactant applied for the electrically-induced anchoring transitions in liquid crystals, the compound 4-heptyloxybenzoate benzyl dodecyldimethylammonium (HOBBDDA) has been synthesized. Its orienting influence on nematic liquid crystal 4-pentyl-4'-cyanobiphenyl (5CB) has been tested. HOBBDDA dissolved up to 1.4%in 50 droplets dispersed in polymer film does not change the tangential surface anchoring inherent to polyvinyl alcohol matrix used. Homeotropic surface anchoring is realized if the HOBBDDA content exceeds 1.7%. The molecules of the surfactant in 5CB dissociate into anions and cations. The anions modify the surface anchoring under the action of DC electric field both in the normal and inverse mode. The mixture of HOBBDDA and cetyltrimethylammonium bromide can function as a binary ionic cationic surfactant which significantly expands the prospects for using the ionic-surfactant method to control liquid crystal materials. (C) 2019 Elsevier B.V. All rights reserved.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Belarusian State Technol Univ, Minsk 220006, BELARUS.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Kuz'menok, N. M.; Mikhalyonok, S. G.; Bezborodov, V. S.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Belarusian Republican Foundation for Fundamental Research [X16P-110]; Russian Foundation for Basic Research (RFBR) [16-53-00073]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243006]; International conference on Hole Burning, Single Molecule, and Related Spectroscopies: Science and Applications - 2018(XIII ; August 6-12, 2018 ; Suzdal - Moscow, Russia)
}
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13.

Crystal texture-dependent magnetic and magnetotransport properties of half-metallic Fe3O4 films grown on oxidized Si substrates by reactive deposition / V. V. Balashev [et al.] // J. Alloys Compd. - 2020. - Vol. 815. - Ст. 152398, DOI 10.1016/j.jallcom.2019.152398. - Cited References: 58. - his work is supported in part by the Russian Ministry of Science and Higher Education under the state tasks ( 3.5178.2017/8.9 and 3.4956.2017 ), by Act 211 of the Government of the Russian Federation (contract No. 02.A03.21.0011 ) and by the Comprehensive Program of Basic Research of the Far Eastern Branch of the Russian Academy of Sciences “Far East” 2018–2020 № 18-3-022 ( 0226-18-0031 ). . - ISSN 0925-8388
Кл.слова (ненормированные):
Magnetite -- Crystal texture -- Reactive deposition -- Magnetoresistance -- Magnetic saturation -- FORC
Аннотация: Nanocrystalline magnetite (Fe3O4) films with various preferred crystallite orientations were grown on oxidized silicon surface by reactive iron deposition in an oxygen atmosphere. Depending on the partial pressure of oxygen (PO2), the evolution of the structural, magnetic, and magnetotransport properties of the grown films was investigated. We found that the growth of films containing only the Fe3O4 phase occurs in a certain PO2 range, and the magnetite crystallites may have (311) or (110) preferred orientation. It was revealed that films with (311) and (110) textures have a column structure. An increase in the PO2 leads to a structure transformation from (311) to (110) texture with larger crystallites. A film with (110) texture showed higher values of saturation magnetization, magnetoresistance and spin polarization. The analysis of approach to magnetic saturation revealed that the local magnetic anisotropy of crystallites in textured films is much higher than the anisotropy of bulk magnetite due to the large surface contribution. The FORC diagram method in combination with the approach to magnetic saturation proved the existence of the exchange coupling between large and small grains. Our results open the reliable route for crystal texture-depending manipulation of functional properties of thin magnetite films for advanced spintronic applications.

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Держатели документа:
School of Natural Sciences, Far Eastern Federal University, Vladivostok, Russian Federation
Institute of Automation and Control Processes, FEB RAS, Vladivostok, Russian Federation
Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
National Research South Ural State University, Chelyabinsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balashev, V. V.; Ermakov, K. S.; Samardak, A. Y.; Ognev, A. V.; Samardak, A. S.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Tarasov, A. S.; Тарасов, Антон Сергеевич; Korobtsov, V. V.
}
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14.

A dielectric model of thawed and frozen Arctic soils considering frequency, temperature, texture and dry density / V. L. Mironov, A. Yu. Karavayskiy, Yu. I. Lukin, I. P. Molostov // Int. J. Remote Sens. - 2020. - Vol. 41, Is. 10. - P. 3845-3865, DOI 10.1080/01431161.2019.1708506. - Cited References: 39 . - ISSN 0143-1161. - ISSN 1366-5901
Аннотация: A dielectric model was developed for thawed and frozen mineral soils, based on the refractive mixing dielectric formula and the dielectric measurement data for three soils collected in the Arctic tundra of the Yamal Peninsula. The refractive mixing dielectric model was used in conjunction with the Debye multi relaxation equations as a theoretical model to fit the measured complex relative permittivity spectra as a function of soil moisture and temperature. As a result, the dielectric spectroscopic parameters for the various components of water in the soil, such as the low- and high-frequency limits of the complex relative permittivity, the times of the corresponding relaxations, and the specific conductivity, were simultaneously determined for soils with different clay contents for all measured temperatures. As the theoretical temperature dependences of these parameters, the Clausius–Mossotti, Eyring, and linear equations for the conductivity were used. By using approximations of the measured data with these formulas, the parameters of the temperature-dependent model were derived, such as the coefficient of volume expansion, energy and entropy of activation, and coefficient of thermal conductivity. A set of the parameters discussed above in conjunction with the refractive mixing formula is a temperature- and mineralogically dependent multi-relaxation spectroscopic dielectric model, which enables estimation of the permittivity of moist soils as a function of dry soil density, moisture, frequency, temperature, and texture. The statistical error of the proposed dielectric model was estimated in terms of the normalized root-mean-square error (nRMSE), which was equal to 5% and 25% for the dielectric constant and dielectric loss factor, respectively.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Altai State University, Barnaul, Russia

Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Karavayskiy, A. Yu.; Каравайский, Андрей Юрьевич; Lukin, Y. I.; Лукин, Юрий Иванович; Molostov, I. P.
}
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15.

Gardymova, Anna P..
Optical textures and orientational structures in cholesteric droplets with conical boundary conditions / A. P. Gardymova, M. N. Krakhalev, V. Y. Zyryanov // Molecules. - 2020. - Vol. 25, Is. 7. - Ст. 1740, DOI 10.3390/molecules25071740. - Cited References: 53. - The authors are grateful for the financial support by the Russian Science Foundation (grant No. 18-72-10036). . - ISSN 1420-3049

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
DISPERSED LIQUID-CRYSTALS
CHIRAL NEMATIC DROPLETS
IONIC MODIFICATION
Кл.слова (ненормированные):
cholesteric liquid crystal -- droplet -- optical texture -- orientational structure -- conical surface anchoring -- topological defect
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 2.9
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Держатели документа:
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Russian Science FoundationRussian Science Foundation (RSF) [18-72-10036]
}
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16.

    Ориентационный переход в слое нематика с гомеотропно-коническими граничными условиями, индуцированный ионной модификацией поверхностного сцепления / В. С. Сутормин, М. Н. Крахалев, О. О. Прищепа, В. Я. Зырянов // Жидк. крист. и их практич. использ. - 2022. - Т. 22, № 3. - С. 105-110 ; Liq. Cryst. Appl., DOI 10.18083/LCAppl.2022.3.105. - Библиогр.: 4. - В.С. Сутормин, М.Н. Крахалев и О.О. Прищепа благодарят за поддержку грант РФФИ, Правительства Красноярского края и Красноярского краевого фонда науки в рамках научного проекта № 20-42-240007 . - ISSN 1991-3966. - ISSN 2499-9644
   Перевод заглавия: Orientational transition in nematic layer with homeotropic-conical boundary conditions induced by ionic modification of surface anchoring
Кл.слова (ненормированные):
нематик -- ионный сурфактант -- поверхностное сцепление -- конические граничные условия -- конфигурация директора -- оптическая текстура -- nematic -- ionic surfactant -- surface anchoring -- conical boundary conditions -- director configuration -- optical texture
Аннотация: Исследована трансформация ориентационной структуры в слое нематика с гомеотропно-коническими граничными условиями, индуцированная электроуправляемой ионной модификацией поверхностного сцепления. Обнаружено, что изменение азимутального угла директора на подложке с коническим сцеплением возможно осуществить путем модификации граничных условий на второй подложке.
The transformation of the orientational structure induced by the electrically controlled ionic modification of surface anchoring in the nematic layer with homeotropic-conical boundary conditions has been considered. It has been found that the change in the azimuthal angle of director at the substrate with conical anchoring can be realized by modification of boundary conditions at the second substrate.

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Держатели документа:
Институт физики им. Л. В. Киренского, ФИЦ КНЦ СО РАН, Красноярск, Россия
Институт инженерной физики и радиоэлектроники, Сибирский федеральный университет, Красноярск, Россия

Доп.точки доступа:
Сутормин, Виталий Сергеевич; Sutormin, V. S.; Крахалев, Михаил Николаевич; Krakhalev, M. N.; Прищепа, Оксана Олеговна; Prishchepa, O. O.; Зырянов, Виктор Яковлевич; Zyryanov, V. Ya.

}
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17.

    Азимутальный поворот периодической структуры линейных дефектов в слое холестерика с планарно-коническими граничными условиями / О. О. Прищепа, В. С. Сутормин, М. Н. Крахалев [и др.] // Жидк. крист. и их практич. использ. - 2022. - Т. 22, № 3. - С. 111-115 ; Liq. Cryst. Appl., DOI 10.18083/LCAppl.2022.3.111. - Библиогр.: 7 . - ISSN 1991-3966. - ISSN 2499-9644
   Перевод заглавия: Azimuthal rotation of periodic structure of linear defects in cholesteric layer under planar-conical boundary conditions
Кл.слова (ненормированные):
холестерик -- линейный дефект -- периодическая структура -- дифракция -- поверхностное сцепление -- конические граничные условия -- оптическая текстура -- cholesteric -- linear defect -- periodic structure -- diffraction -- surface anchoring -- conical boundary conditions -- optical texture
Аннотация: Исследован процесс формирования периодической структуры линейных дефектов в слое холестерика с планарно-коническими граничными условиями, происходящий под действием электрического поля при релаксации из гомеотропного состояния. Показано, что, прикладывая напряжение в диапазоне 0 ≤ U ≤ 1,8 В, можно получить периодические структуры, ориентированные под различными азимутальными углами в пределах 90°, зависящими от величины поля.
Electrically induced azimuthal rotation of periodic structure of linear defects formed within cholesteric layer under planar-conical boundary conditions during relaxation from homeotropic state has been studied. It has been shown that when applying a voltage in the range 0 ≤ U ≤ 1,8 V, the periodic structures oriented at different azimuthal angles (within 90°) depending on the field values can be formed.

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Держатели документа:
Институт физики им. Л. В. Киренского, ФИЦ КНЦ СО РАН, Красноярск, Россия
Институт инженерной физики и радиоэлектроники, Сибирский федеральный университет, Красноярск, Россия

Доп.точки доступа:
Прищепа, Оксана Олеговна; Prishchepa, O. O.; Сутормин, Виталий Сергеевич; Sutormin, V. S.; Крахалев, Михаил Николаевич; Krakhalev, M. N.; Иваненко, Александр Анатольевич; Ivanenko, A. A.; Шефер, Александр Давыдович; Shefer, A. D.; Зырянов, Виктор Яковлевич; Zyryanov, V. Ya.

}
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18.

Anisotropy and crystallite misalignment in textured superconductors / D. M. Gokhfeld, S. V. Semenov, M. I. Petrov [et al.] // J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 1. - P. 59-65, DOI 10.1007/s10948-022-06454-8. - Cited References: 21. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project “Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements” No. 20–42–240008 . - ISSN 1557-1939. - ISSN 1557-1947
Кл.слова (ненормированные):
Critical current -- Anizotropy -- BSCCO -- Texture -- Distribution function -- Magnetization -- Hysteresis loop
Аннотация: A misalignment of anisotropic crystallites causes small values of anisotropy and decreases the critical current density of textured polycrystalline superconductors. To relate the crystallite misalignment and out-plane anisotropy, the magnetic properties of the textured Bi2223 polycrystalline superconductor were investigated. A distribution of orientation angles of crystallites was determined using different data: scanning electron microscopy images and hysteresis magnetization loops when an external magnetic field was applied at different angles with respect to the texturing plane of the sample. It was demonstrated that the standard deviation of the distribution and the magnetic disorder angle of crystallites in textured samples can be determined from the magnetization data in perpendicular directions. These data may be either the irreversible magnetization measured for two different orientations of the sample or the simultaneously measured magnetization projections parallel and perpendicular to the magnetic field.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Semenov, S. V.; Семенов, Сергей Васильевич; Petrov, M. I.; Петров, Михаил Иванович; Nemtsev, I. V.; Немцев, Иван Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович
}
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19.

Optical texture super-lattices produced by Talbot effect at superimposed gratings / E. C. Darmaev, D. A. Ikonnikov, S. A. Myslivets [et al.] // Ann. Phys. (Berlin). - 2023. - Vol. 535, Is. 3. - Ст. 2200543, DOI 10.1002/andp.202200543. - Cited References: 32. - The work was supported by the Russian Science Foundation (Grant No. 19-12-00203) . - ISSN 0003-3804. - ISSN 1521-3889
Кл.слова (ненормированные):
optical lattices -- superimposed gratings -- Talbot effect
Аннотация: Fresnel diffraction on periodic gratings results in a two-dimensional periodic distribution of light intensity, also known as the Talbot effect. Here this approach is extended to the family of superimposed structures with translational symmetry, which consist of superposed spatial harmonics. The Talbot effect is demonstrated to be valid for superimposed gratings. The considered superimposed gratings provide a wide range of textures of optical super-lattices. These texture super-lattices represent a Talbot carpets with a complex motif, which can be varied by choosing structure parameters. These results provide a new functionality for structuring optical lattices and can find potential applications in a wide range of light–matter interactions.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Sukachev Institute of Forest, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Darmaev, E. C.; Дармаев, Э. Ч.; Ikonnikov, D. A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Vyunisheva, S. A.; Вьюнышева Софья Александровна; Davletshin, N. N.; Давлетшин, Николай Николаевич; Baron, F. A.; Барон, Филипп Алексеевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович
}
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20.

Muzalevskiy, K. V.
Optimum frequency range for remote sensing of soil moisture with various texture, density and organic matter content / K. Muzalevskiy, S. Fomin, A. Karavayskiy // 2022 IEEE International Multi-Conference on Engineering, Computer and Information Sciences, SIBIRCON 2022 : IEEE, 2022. - P. 1130-1133, DOI 10.1109/SIBIRCON56155.2022.10017095. - Cited References: 28. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project №22-17-20042
Кл.слова (ненормированные):
Microwave remote sensing -- radiolocation -- unmanned aerial vehicle -- soil permittivity -- soil moisture
Аннотация: In this article, the frequency range, within which the dependence of reflectivity on soil moisture is invariant respect to changes in soils texture, dry bulk density and organic matter content, has been established. The analysis is based on dielectric measurements of 16 natural mineral nonsaline soils in the frequency range from 45-100 MHz to 2 GHz. The moisture of soils varied from air dry to the field capacity. The clay, silt and sand content in the soil samples are ranging from 0% to 76%, from 1% to 93%, and from 0 to 100%, respectively. The dry bulk density and organic matter content in soil samples are ranging from 0.7 g/cm3 to 1.8g/cm3, and from 0.6% to 69%, respectively. As a result, it is shown, that the variations in texture, dry bulk density, and organic matter content of soils have the least effect in the frequency range from 125 MHz to 820 MHz (with minimum at a frequency of 350 MHz) on the dispersion of the dependence of refractive index on volumetric moisture. As an example, the case of smooth bare soil surface remote sensing at a frequency of 435 MHz is considered. It is shown that for the entire set of soils, a single calibration curve for conversion of reflectivity to volumetric soil moisture is sufficient to retrieve soil moisture with a root-mean square error of 2.1% and a determination coefficient of 0.981. The established frequency range can be recommended for microwave remote sensing methods of soil moisture measurement, not depended on soils texture.

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Держатели документа:
Laboratory of Radiophysics of the Earth Remote Sensing, Kirensky Institute of Physics Federal Research Center, KSC Siberian Branch, Russian Academy of Science, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Fomin, S. V.; Фомин, Сергей Викторович; Karavayskiy, A. Yu.; Каравайский, Андрей Юрьевич; Музалевский, Константин Викторович; IEEE International Multi-Conference on Engineering, Computer and Information Sciences 2022(1-13 November 2022 ; Yekaterinburg, Russian Federation)
}
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