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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Menzyanova, Natalia G., Pyatina, Svetlana V., Nikolaeva, Elena D., Shabanov A. V., Nemtsev I. V., Stolyarov D. P., Dryganov, Dmitry B., Sakhnov, Eugene V., Vinokurova, Daria A., Shishatskaya, Ekaterina I.
Заглавие : Morphological aspects of monocyte/macrophage polarization on biopolymer scaffolds in atherosclerosis patients
Место публикации : J. Biotechnol. Biomater. - 2018. - Vol. 8, Is. 3. - Ст.1000284. - ISSN 2155-952X, DOI 10.4172/2155-952X.1000284
Примечания : Cited References: 67. - The study was supported by the State budget allocated to the fundamental research at the Russian Academy of Sciences (project No 01201351505).
Ключевые слова (''Своб.индексиров.''): monocytes--macrophages--cell morphology--polyhydroxyalkanoates--pha--copolymers--atherosclerosis--intravascular stenting
Аннотация: The morphotypes of human macrophages (MPh) were studied in the culture on nano-structured substrates, made from polyhydroxyalcanoates (PHAs) of various monomer compositions, prepared by casting polymer solutions on a defatted glass and followed by the solvent evaporation. Its surface relief, being further in direct contact with human cells in vitro was analyzed by AFM and SEM scanning. It was shown, that the features of micro/nano relief depend on the monomeric composition of polymer substrates. Monocytes (MNs) of patients with atherosclerosis and cardiac ischemia undergoing stenting and conventional anti-atherosclerotic therapy were harvested prior to and after stenting. After isolation MNs were cultured and transformed into MPh in direct contact with biopolymer culture substrates with different monomer composition and Nano-reliefs in comparison with culture plastic. Sub-populations of cells with characteristic morphology in each phenotypic class were described and their ratios for five samples of polymers were counted as an intermediate result in the development of “smart” material for blood vessel recovery. The results obtained allow us to assume that the processes of MPh differentiation and polarization in vitro depend not only on the features of the micro/nano relief of biopolymer substrates but also on the initial state of MNs in vivo and the general response of patients.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rudakova N. V., Timofeev I. V., Vetrov S. Ya., Lee W.
Заглавие : All-dielectric polarization-preserving anisotropic mirror
Место публикации : OSA Contin. - 2018. - Vol. 1, Is. 2. - P.682-689. - ISSN 2578-7519, DOI 10.1364/OSAC.1.000682
Примечания : Cited References: 39. - Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (17-42-240464). Ministry of Science and Technology, Taiwan (MOST) (106-2923-M-009-002-MY3).
Предметные рубрики: Nanophotonics, Metamaterials, and Photonic Crystals
Ключевые слова (''Своб.индексиров.''): cholesteric liquid crystals--circular polarization--electric fields--optical devices--phase plates--refractive index
Аннотация: The structure consisting of alternating uniaxial dielectric layers is known to produce reflection of the same polarization as the incident field; e.g., the right-hand elliptically polarized light preserves this right-handedness and ellipticity of polarization at reflection. The parameters permitting the properly-polarized reflectance to exceed 99% in a wide frequency range were considered both analytically and numerically. The mirror with tuned top-layer thickness is shown to have several times less polarization losses than the uniform mirror. The hybrid mirror with metallic bottom layer has a considerably reduced thickness.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Eremin E. V., Gudim I. A., Temerov V. L., Smolyakov D. A., Molokeev M. S.
Заглавие : Comparing the magnetic and magnetoelectric properties of the SmFe3(BO3)4 ferroborate single crystals grown using different solvents
Коллективы : Russian Foundation for Basic Research (RFBR) [18-02-00696_a]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [18-42-240011 p_a]
Место публикации : J. Cryst. Growth. - 2019. - Vol. 518. - P.1-4. - ISSN 0022-0248, DOI 10.1016/j.jcrysgro.2019.04.017. - ISSN 1873-5002(eISSN)
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (RFBR) according to the research projects No. 18-02-00696_a and RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund by project No. 18-42-240011 p_a.
Предметные рубрики: POLARIZATION
FEATURES
Ключевые слова (''Своб.индексиров.''): impurities--growth from solutions--single crystal growth--borates--ferroelectric materials--magnetic materials
Аннотация: SmFe3(BO3)4 single crystals have been grown from the bismuth trimolybdate and lithium tungstate-based melt–solutions. Samarium ferroborate single crystals were grown first from the lithium–tungstate flux. The magnetic and magnetoelectric properties of the synthesized crystals have been compared. It is shown that the SmFe3(BO3)4 ferroborate grown from the bismuth trimolybdate-based melt–solution contains impurities of Bi3+ ions (∼5% at.), which replace Sm3+ ions, while the SmFe3(BO3)4, ferroborate grown from the lithium tungstate-based melt–solution contains minor or zero amounts of such impurities. The magnetoelectric and magnetodielectric effects with the Bi3+ admixture appeared 1.5× stronger than in SmFe3(BO3)4; this is probably due to twinning.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gorev M. V., Flerov I. N., Bormanis K.
Заглавие : Thermal expansion and polarization of (1-x)PbNi1/3Nb2/3O3 - xPbTiO3 solid solutions
Коллективы : International Conference on Functional Materials and Nanotechnologies
Место публикации : Funct. Mater. Nanotechnologies: book of abstracts 12th Int. Sci. Conf. - 2018. - P.179. - ISBN 978-9934-18-375-1
Примечания : Библиогр.: 2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Menzyanova N. G., Pyatina S. А., Nikolaeva E. D., Shabanov A. V., Nemtsev I. V., Stolyarov D. P., Dryganov D. B., Sakhnov E. V., Shishatskaya E. I.
Заглавие : Screening of biopolymeric materials for cardiovascular surgery toxicity—Evaluation of their surface relief with assessment of morphological aspects of monocyte/macrophage polarization in atherosclerosis patients
Место публикации : Toxicol. Rep. - 2019. - Vol. 6. - P.74-90. - ISSN 22147500 (ISSN), DOI 10.1016/j.toxrep.2018.11.009
Примечания : Cited References: 85. - The study was supported by the Russian Science Foundation , Project No 17-15-01352 .
Ключевые слова (''Своб.индексиров.''): monocytes--macrophages--cell morphology--polyhydroxyalkanoates--atherosclerosis--intravascular stenting
Аннотация: The morphotypes of human macrophages (MPh) were studied in the culture on nano-structured biopolymer substrates, made from polyhydroxyalcanoates (PHAs) of five various monomer compositions, followed by the solvent evaporation. Its surface relief, which was further in direct contact with human cells in vitro, was analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). It was shown, that the features of the micro/nano relief depend on the monomeric composition of the polymer substrates. Monocytes (MN) of patients with atherosclerosis and cardiac ischemia, undergoing stenting and conventional anti-atherosclerotic therapy, were harvested prior and after stenting. MN were isolated and cultured, with the transformation into MPh in direct contact with biopolymer culture substrates with different monomer composition and nano-reliefs, and transformed into MPh, in comparison with the same process on standard culture plastic. Sub-populations of cells with characteristic morphology in each phenotypic class were described, and their quantitative ratios for each sample of polymers were counted as an intermediate result in the development of “smart” material for cardiovascular devices. The results obtained allow us to assume, that the processes of MPh differentiation and polarization in vitro depend not only on the features of the micro/nano relief of biopolymer substrates, but also on the initial state of MN in vivo and general response of patients.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rudakova N. V., Timofeev I. V., Bikbaev R. G., Vetrov S. Ya., Lee W.
Заглавие : Chiral optical Tamm states at the interface between a cholesteric and an all-dielectric polarization-preserving anisotropic mirror
Коллективы : International Liquid Crystal Conference
Место публикации : Abstracts of 27th International Liquid Crystal Conference (ILCC 2018). - 2018. - Ст.4-D-12
Примечания : Cited References: 3
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gunyakov V. A., Timofeev I. V., Krakhalev M. N., Sutormin V. S., Lee W., Zyryanov V. Ya.
Заглавие : Linear polarization rotation by a twisted-nematic Fabry–Pйrot cavity
Коллективы : International Liquid Crystal Conference
Место публикации : Abstracts of 27th International Liquid Crystal Conference (ILCC 2018). - 2018. - Ст.P4-C1-21
Примечания : Cited References: 3
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Churilov G. N., Dudnik A. I., Drokin N. A., Vnukova N. G., Tomashevich E. V., Bondarev V. S.
Заглавие : Obtaining of hydroxylated fullerenes Y@C82OX(OH)Y, Y2@C82OX(OH)Y, Y2C2@C82OX(OH)Y and electrophysical characteristic of composite film based thereon
Место публикации : Fuller. Nanotub. Carbon Nanostruct. - 2018. - Vol. 26, Is. 12. - P.799-803. - ISSN 1536383X (ISSN), DOI 10.1080/1536383X.2018.1501559
Примечания : Cited References: 33. - We thank A.A. Popov and his team (The Leibniz Institute for Solid State and Materials Research, Dresden, Germany) for research conducted via mass-spectrometer MALDI-TOF Bruker BIFLEX TM III.
Ключевые слова (''Своб.индексиров.''): endohedral metallofullerene--impedance spectroscopy--polarization
Аннотация: The article presents, for the first time, the results of the research on composite film obtained from hydroxylated endohedral metallofullerenes (EMF) Y@C82, Y2@C82, with Y2C2@C82 and highest fullerenes as dopant. The composite film has been established to have electric conductivity and to be a ferroelectric with the value of residual polarization of ∼0.75 μC/cm2. The impedance spectroscopy of this sample allowed us to determine dispersion of dielectric permittivity and conductivity in the range of frequencies of 0.5 Hz–100 MHz. It is stated that the value of the high-frequency dielectric permittivity of films is ε′∞ = 2.8. However, with reduction in the electric field frequency, real and imaginary parts of ε increase to values ∼104–105. Such increase in dielectric permittivity is connected with increase in polarizing caused by accumulation of mobile electric charges (electrons of ions, protons) on boundaries of the structural defects of a film, which are divided by thin dielectric interlayers. The film is solid electrolyte with the ionic conductivity of ∼5 × 10−7 S/cm.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Kretinin V. V., Molokeev M. S., Mironova-Ulmane N.
Заглавие : Dipole glass in chromium-substituted bismuth pyrostannate
Коллективы : Russian Foundation for Basic Research [N 18-52-00009 Bel_a, 18-32-00079 mol_a, 3.5743.2017/6.7]
Место публикации : Mater. Res. Express. - 2018. - Vol. 5, Is. 11. - Ст.115202. - ISSN 2053-1591, DOI 10.1088/2053-1591/aaddd9
Примечания : Cited References: 33. - This study was supported by the Russian Foundation for Basic Research project N 18-52-00009 Bel_a, No 18-32-00079 mol_a, the state order No 3.5743.2017/6.7.
Предметные рубрики: BI4TI3O12 THIN-FILMS
NEUTRON-DIFFRACTION
RAMAN-SPECTROSCOPY
BI2SN2O7
Ключевые слова (''Своб.индексиров.''): dipole glass--permittivity--polarization--raman scattering spectra--structural transition
Аннотация: To establish the existence of dipole glass in the chromium-substituted bismuth pyrostannate solid solutions, the frequency and temperature dependences of the permittivity have been measured in the temperature range of 300–750 K. The field and dynamic dependences of polarization in the temperature range of 80–550 K have been determined. Using the Raman scattering spectra, the absence of inversion center has been established. The maximum of electrical resistance has been found in the vicinity of the dipole moment freezing point. The carrier type has been determined from the thermopower data. The polarization relaxation is shown to be nonexponential. The experimental data are explained within the model of dipole glass in the α- phase and the model of charged crystalline domain walls with the electron-polarization relaxation mechanism above the α–β structural transition.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Loiko V. A., Konkolovich A. V., Miskevich A. A., Prishchepa O. O., Shabanov A. V., Krakhalev M. N., Zyryanov V. Ya.
Заглавие : Polarization, transmission, and small-angle scattering of light by a polymer film with elongated droplets of nematic liquid crystal
Место публикации : J. Quant. Spectrosc. Radiat. Transf. - 2019. - Vol. 229. - P.130-144. - ISSN 00224073 (ISSN) , DOI 10.1016/j.jqsrt.2019.03.006
Примечания : Cited References: 29. - The work was performed in the framework of an agreement on inter-academic cooperation between the National Academy of Sciences of Belarus and the Siberian Branch of the Russian Academy of Sciences and supported by the Belarusian Republican Foundation for Fundamental Research (project no. F18RA-003 ). M.N. Krakhalev thanks the Russian Foundation for Basic Research and Government of Krasnoyarsk Territory , Krasnoyarsk Regional Fund of Science, grant no. 18-42-243006.
Аннотация: An optical-mechanical model has been developed to describe the transmittance, polarization and small-angle distribution of light scattered by an uniaxially-stretched polymer film containing the elongated ellipsoidal droplets of nematic liquid crystal. It is based on the approximations of Foldy-Twersky, anomalous diffraction, and single scattering. The spectral dependences of transmittances and polarizing abilities of the polymer dispersed liquid crystal films have been analyzed as well as the small-angle intensity distribution and the polarization degree of scattered light depending on the film thicknesses, refractive index of polymer matrix, sizes of droplets, their anisometry parameters, concentration, polydispersity, and optical axes orientation. The optical characteristics of films with homogeneous and inhomogeneous interfacial anchoring at the surface of liquid crystal droplets have been considered. The transmittance and polarizing ability of the films have been studied as functions of the angular aperture of the system recording scattered light. © 2019 Elsevier Ltd
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Mitskan V. A., Zlotnikov A. O., Shustin M. S., Aksenov S. V.
Заглавие : Occurrence of Topologically Nontrivial Phases, Cascade of Quantum Transitions, and Identification of Majorana Modes in Chiral Superconductors and Nanowires (Scientific Summary)
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [16-02-00073, 18-32-00443, 19-02-00348]; Government of the Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-42-243017, 18-42-243018, 18-42-240014]; Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK-3722.2018.2, MK-3594.2018.2]
Место публикации : JETP Letters. - 2019. - Vol. 110, Is. 2. - P.140-153. - ISSN 0021-3640, DOI 10.1134/S002136401914011X. - ISSN 1090-6487(eISSN)
Примечания : Cited References: 88. - This work was supported by the Russian Foundation for Basic Research (project nos. 16-02-00073, 18-32-00443, 19-02-00348) and jointly by the Government of the Krasnoyarsk Territory, the Krasnoyarsk Regional Fund of Science (project no. 18-42-243017, "Manifestation of Coulomb Interactions and Effects of Bounded Geometry in the Properties of Topological Edge States of Nanostructures with Spin-Orbit Interaction"; project no. 18-42-243018, "Contact Phenomena and Magnetic Disorder in the Problem of the Formation and Detection of Topologically Protected Edge States in Semiconductor Nanostructures"; and project no. 18-42-240014, "Single-Orbit Effective Model of an Ensemble of Spin-Polaron Quasiparticles in the Problem of Describing the Intermediate State and Pseudogap Behavior of Cuprate Superconductors"). S.V. Aksenov and A. O. Zlotnikov acknowledge the support of the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project nos. MK-3722.2018.2 and MK-3594.2018.2).
Предметные рубрики: HUBBARD FERMIONS
BOUND-STATE
SPIN
POLARIZATION
COEXISTENCE
Аннотация: The problems of occurrence and experimental identification of topologically nontrivial phases in condensed matter have been reviewed. The results of the study of the effect of strong intra- and interatomic Coulomb interaction on a quantum phase transition with change in the topological index in an ensemble of Hubbard fermions on a triangular lattice have been reported. Nontrivial topology of the phase of coexistence of d + id chiral superconductivity and 120° spin ordering in a system with the triangular lattice has been discussed and the formation of Majorana modes in such a phase has been demonstrated. A cascade of quantum transitions that occurs at the variation of the magnetic field or the electrochemical potential has been analyzed for an open nanowire with the Rashba spin-orbit coupling and the induced superconducting pairing potential. It has been shown that anomalies of magneto- and electrocaloric effects are manifested near such quantum transitions and can be used to experimentally test materials on the existence of topologically nontrivial phases in them. The switching of the spin-polarized current in the topological superconducting phase has been predicted for a semimetal/superconducting wire/semimetal structure in the weak nonequilibrium regime.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Kretinin V. V., Begisheva O. B.
Заглавие : Magnetoelectric Effect in a Paramagnetic Region in Gd0.15Mn0.85Se
Коллективы : Russian foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk region; Krasnoyarsk Regional Foundation for Science [18-42-240001, MK 591.2019.2, 3.5743.2017/6.7]
Место публикации : Phys. Solid State. - 2019. - Vol. 61, Is. 8. - P.1379-1382. - ISSN 1063-7834, DOI 10.1134/S1063783419080067. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 16. - This work was supported by the Russian foundation for Basic Research, the Government of the Krasnoyarsk region, and Krasnoyarsk Regional Foundation for Science in the framework of the scientific project no. 18-42-240001 "Inversion of the sign of components of the magnetoelectric tensor in temperature in neodymium-substituted bismuth ferrite-garnet films," grant MK 591.2019.2, and state task no. 3.5743.2017/6.7.
Предметные рубрики: MULTIFERROICS
Аннотация: The electric polarization in a zero magnetic field and in a magnetic field of 12 kOe is measured in a GdxMn1 – xSe solid solution in the percolation concentration region in the temperature range 80–380 K. For composition x = 0.15, the polarization hysteresis and the dependence of the remanent polarization on magnetic field and temperature are determined. The hysteresis is explained in the model of migration polarization and the magnetoelectric effect is explained in the Maxwell–Wagner model.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Averyanov D. V., Tokmachev, Andrey M., Parfenov, Oleg E., Karateev, Igor A., Sokolov I. S., Taldenkov, Alexander N., Platunov M. S., Wilhelm, Fabrice, Rogalev, Andrei, Storchak V. G.
Заглавие : Probing proximity effects in the ferromagnetic semiconductor EuO
Коллективы : NRC "Kurchatov Institute"; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-07-00249]; Russian Science FoundationRussian Science Foundation (RSF) [19-19-00009]
Место публикации : Appl. Surf. Sci. - 2019. - Vol. 488. - P.107-114. - ISSN 0169-4332, DOI 10.1016/j.apsusc.2019.05.191. - ISSN 1873-5584(eISSN)
Примечания : Cited References: 57. - This work is partially supported by NRC "Kurchatov Institute" (synthesis), the Russian Foundation for Basic Research [grant 19-07-00249] (magnetization measurements), and the Russian Science Foundation [grant 19-19-00009] (transport measurements). The measurements have been carried out using the equipment of the resource centers of electrophysical, laboratory X-ray, and electron microscopy techniques of NRC "Kurchatov Institute". The authors also gratefully acknowledge the beamtime allocation (MA-3167) by the ESRF.
Предметные рубрики: INTERFACE
FIELD
POLARIZATION
INSULATOR
SILICON
Аннотация: Ferromagnetic insulators are widely employed to induce magnetic phenomena in adjacent layers via proximity effect. This approach could make non-magnetic materials (ranging from silicon to graphene) available for spintronic applications. Eu chalcogenides, EuO in particular, are highly efficient spin generators but suffer from low Curie temperatures. Here, experiments aimed at T-C increase in EuO by its integration with the ferromagnetic metal Gd are reported. The epitaxial bilayers Gd/EuO are synthesized on different substrates and characterized by a combination of diffraction and microscopy techniques. Their magnetic structure - established with magnetization and transport measurements as well as element-selective X-ray magnetic circular dichroism study - comprises coupled magnetic orders of EuO and Gd. EuO is robust against proximity effects - its T-C is still low, increased at most by a few tens of K. Nevertheless, the results encourage further studies of proximity-enhanced ferromagnetism to extend the range of applications of ultrathin layers of EuO in spintronics.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rudakova N. V., Timofeev I. V., Bikbaev R. G., Pyatnov M. V., Vetrov S. Ya., Lee W.
Заглавие : Chiral optical Tamm states at the interface between an all-dielectric polarization-preserving anisotropic mirror and a cholesteric liquid crystal
Место публикации : Crystals. - 2019. - Vol. 9, Is. 10. - Ст.502. - ISSN 20734352 (ISSN), DOI 10.3390/cryst9100502
Примечания : Cited References: 48. - Russian Foundation for Basic Research (RFBR), Russia, grant No. 19-52-52006; Ministry of Science and Technology, Taiwan (MOST), grant No. 106-2923-M-009-002-MY3; M.V.P. thanks RFBR and KRSTSF for the research Project No. 18-42-243025.
Аннотация: As a new localized state of light, the chiral optical Tamm state exists at the interface between a polarization-retaining anisotropic mirror and a substance with optical activity. Considering a hybrid structure comprising a metal-free polarization-preserving mirror and a cholesteric liquid crystal, we highlight the high Q factor arising from the all-dielectric framework. The intensity of localized light decreases exponentially with increasing distance from the interface. The penetration of the field into the cholesteric liquid crystal is essentially prohibited for wavelengths lying in the photonic bandgap and close to the cholesteric pitch length. The dielectric mirror has its own photonic bandgap. The energy transfer along the interface can be effectively switched off by setting the tangential wave vector to zero. The spectral behavior of the chiral optical Tamm state is observed both as reflection and transmission resonance. This Fano resonance is analogous to the Kopp-Genack effect. Our analytics are well in line with precise calculations, which may pave a new route for the future development of intelligent design for laser and sensing applications.
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Loiko V. A., Konkolovich A. V., Miskevich A. A., Prishchepa O. O., Shabanov A. V., Krakhalev M. N., Zyryanov V. Ya.
Заглавие : Polymer films with elongated droplets of nematic liquid crystal: light transmission, scattering, and polarization
Коллективы : European Conference on Liquid Crystals
Место публикации : 15th Eur. Conf. Liq. Cryst. (ECLC): conf. progr. - 2019. - Ст.H2-O-31
Примечания : Cited References: 3
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rudakova N. V., Timofeev I. V., Bikbaev R. G., Pyatnov M. V., Vetrov S. Ya., Chen K.-P., Lee W.
Заглавие : Chiral optical Tamm state at the interface between multilayer polarization-preserving anisotropic mirror and cholesteric
Коллективы : Asian Conference on Liquid Crystals
Место публикации : The 4th Asian Conference on Liquid Crystals (ACLC 2019): abstracts. - 2019. - P.
Примечания : Библиогр.: 4
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Sitnikov M. N., Kharkov A. M., Masyugin A. N., Kretinin V. V., Fisenko O. B., Gorev M. V.
Заглавие : Influence of Induced Electrical Polarization on the Magnetoresistance and Magnetoimpedance in the Spin‐Disordered TmxMn1−xS Solid Solution
Место публикации : Phys. Status Solidi B. - 2019. - Vol. 256, Is. 10. - Ст.1900043. - ISSN 03701972 (ISSN) , DOI 10.1002/pssb.201900043
Примечания : Cited References: 25
Аннотация: The transport properties of the TmxMn1–xS (x ≤ 0.15) solid solutions in the temperature range of 200–600 K have been investigated. The temperatures of lattice polaron pinning accompanied by the lattice strain, condensation of the infrared modes, and thermionic emission have been determined. The change of the carrier sign with temperature has been found from the Hall coefficient data and dragging of electrons by phonons, from the thermopower data. The dependence of the magnetoresistance on the concentration, current, and voltage has been established from the I–V characteristics measured without field and in an applied magnetic field of H = 8 kOe in the temperature range of 300–500 K. The functional temperature dependence of the carrier relaxation time has been determined using the impedance data. The concentration region with the magnetoimpedance sign varying with frequency and temperature has been found. The increase in the relaxation time of the induced electric polarization with increasing concentration of thulium ions has been observed. The experimental data have been interpreted in the framework of the Debye and Maxwell–Wagner models, as well as the theoretical model for the Rashba spin–orbit interaction.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Kretinin V. V., Masyugin A. N., Romanova O. B., Sitnikov M. N., Begisheva O. B., Galyas, A., I, Demidenko O. F., Yanushkevich, K., I
Заглавие : IR-range photoinduced diode effect in the manganese-substituted bismuth ferrite films
Коллективы : RFBR [18-52-00009 Bel_ a, 18-32-00079 mol_ a]; Belarusian Foundation [F18R-084]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-240001 r_ a]; [3.5743.2017/6.7]
Место публикации : Semicond. Sci. Technol. - 2019. - Vol. 34, Is. 9. - Ст.095007. - ISSN 0268-1242, DOI 10.1088/1361-6641/ab3160. - ISSN 1361-6641(eISSN)
Примечания : Cited References: 45. - The reported study was funded by RFBR according to the research project No 18-52-00009 Bel_ a; No 18-32-00079 mol_ a and Belarusian Foundation project No F18R-084. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science No 18-42-240001 r_ a, to the research project: "Inversion of the sign of the components of the magnetoelectric tensor on the temperature in films of bismuth garnet ferrite replaced by neodymium". This work is part of the research program the state order No 3.5743.2017/6.7.
Предметные рубрики: POOLE-FRENKEL CONDUCTION
BIFEO3 FILMS
LIGHT
Аннотация: The photoinduced diode effect has been found in BiMnxFe1-xO3 (0 X 0.15) films in the near-infrared and violet spectral ranges in a wide temperature interval. The dependences of the diode effect on temperature, wavelength, and illumination power have been established. The mechanism of the ferroelectric diode has been determined using its I-V characteristics at different illumination powers, optical spectra, far-infrared absorption spectra, and electric polarization hysteresis. The interplay between the photodiode effect and conductivity mechanism has been elucidated. The model of strong Coulomb potential fluctuations and quantum well asymmetry caused by the electric polarization in the film and difference between the times of carrier thermalization and recombination of electrons and holes is proposed.В пленках феррита висмута BiMnxFe1-xO3 (0 x 0.15) обнаружен фотоиндуцированный диодный эффект в ближней инфракрасной и фиолетовой областях спектра в широкой области температур. Определена зависимость диодного эффекта от температуры, длины волны, мощности освещения. Механизм ферроэлектрического диода определяется из вольт-амперных характеристик при разных интенсивностях освещения, оптических спектров и спектров поглощения в дальней ИК области, гистерезиса электрической поляризации. Устанавливается связь фотодиодного эффекта с механизмом проводимости. Предложена модель сильных флуктуаций кулоновского потенциала, асимметрия квантовых ям в результате наличия электрической поляризации в пленке и отличие времен термолизации носителей тока и рекомбинации электронов и дырок.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Flerov I. N., Bormanis K., Kalvane A.
Заглавие : Thermal expansion and polarization of (1-x)PNN-xPT solid solutions
Коллективы : International Scientific Conference on Functional Materials and Nanotechnologies
Место публикации : Integr. Ferroelectr. - 2019. - Vol. 196, Is. 1. - P.60-63. - ISSN 1058-4587, DOI 10.1080/10584587.2019.1591957. - ISSN 1607-8489(eISSN)
Примечания : Cited References: 6
Предметные рубрики: BEHAVIOR
Аннотация: The paper presents the results of detailed studies of the thermal expansion of (1-x)he paper presents the results of detailed studies of the thermal expansion of (1-x)PbNi1/3Nb2/3O3-xPbTiO3 solid solutions with x = 0-0.8. The anomalous and lattice contributions to deformation and the thermal expansion coefficient are analyzed and the mean square polarization Pd is determined. The results obtained are discussed within the framework of the thermodynamic theory and the Landau 2-4-6 coefficients for solid solutions are estimated.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Aksenov S. V.
Заглавие : Effect of magnetic field orientation and disorder on Majorana polarization in wires with topological superconductivity
Место публикации : Low Temp. Phys: American Institute of Physics, 2017. - Vol. 43, Is. 4. - P.437-441. - ISSN 1063777X (ISSN), DOI 10.1063/1.4983331
Примечания : Cited References: 20. - This work was supported by the Complex program of the Siberian Branch of the Russian Academy of Sciences Grant No. 0358-2015-0007, the Russian Foundation for Basic Research, the government of Krasnoyarsk region, and the Krasnoyarsk region foundation for support of scientific and technical activity (Grant Nos. 15-42-04372, 16-02-00073, and 16-42-242036).
Аннотация: Majorana polarization, previously introduced by Sticlet et al. [Phys. Rev. Lett. 108, 096802 (2012)], is studied for wires in a topological superconductive state with varying orientation of the magnetic field. Numerical calculations show that in the case of a canted field, this polarization can differ in sign, as well as absolute magnitude, at the opposite ends of a wire. Since the Majorana polarization changes sign at one end when the orientation of the magnetic field is changed from perpendicular to longitudinal, there is always a range of angles for which this quantity is significantly suppressed or equals zero. Thus, the Majorana polarization does not always appear as a local order parameter for an arbitrary angle of the magnetic field in the plane perpendicular to the effective Rashba spin-orbital interaction field. It is shown that the introduction of disorder does not lead to qualitatively new effects. At the same time, additional regions with weak Majorana polarization do show up in high magnetic fields. © 2017 Author(s).
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