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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tambasov I. A., Myagkov V. G., Ivanenko A. A., Bykova L. E., Yozhikova E. V., Maksimov I. A., Ivanov V. V.
Заглавие : Effect of exposure to optical radiation and temperature on the electrical and optical properties of In2O3 films produced by autowave oxidation
Коллективы : Ministry of Education and Science of the Russian Federation [14.513.11.0023]
Место публикации : Semiconductors: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 48, Is. 2. - P.207-211. - ISSN 1063-7826, DOI 10.1134/S1063782614020286. - ISSN 1090-6479
Примечания : Cited References: 42. - This study was supported by the Ministry of Education and Science of the Russian Federation, Federal Targeted Program "Research and Development in Priority Fields of Development of the Science and Technology Complex of Russia for 2007-2013", state contract no. 14.513.11.0023.
Предметные рубрики: GAS SENSOR RESPONSE
INDIUM OXIDE-FILMS
THIN-FILMS
HIGH-PERFORMANCE
TIN OXIDE
TRANSPARENT CONDUCTORS
SUBSTRATE-TEMPERATURE
ROOM-TEMPERATURE
TRANSISTORS
PHOTOREDUCTION
Аннотация: Indium-oxide films are synthesized by the autowave-oxidation reaction. It is shown that, upon exposure to optical radiation, the resistance of the films sharply decreases and the maximal relative change in the resistance is 52% at room temperature. Two resistance relaxation rates after termination of the irradiation, 15 Omega s(-1) during the first 30 s and 7 Omega s(-1) over the remaining time, are determined. The data of infrared spectroscopy of the films show that exposure to optical radiation induces a 2.4% decrease in the transmittance at a wavelength of 6.3 mu m. It is found that, after termination of the irradiation, the transmittance gradually increases with a rate of 0.006% s(-1). It is suggested that photoreduction is the dominant mechanism responsible for changes in the electrical and optical properties of the In2O3 films.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Vasiliev A. D., Zvegintsev S. A., Krivomazov S. N., Petrov M. I., Khrustalev B. P.
Заглавие : Tin-based high-temperature superconductor
Место публикации : JETP Letters. - 1989. - Vol. 49, Is. 12. - P.756-758. - ISSN 0021-3640
Примечания : Cited References: 8
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Khrustalev B. P., Krivomazov S. N., Петров, Михаил Иванович, Vasilyev A. D., Zwegintsev S. A.
Заглавие : Superconductivity near liquid nitrogen temperature in the Sn-Ba-Sr-Y-Cu-O system
Место публикации : Physica C-Superconductivity and its Applications. - 1989. - Vol. 161, Is. 4. - P.493-496. - ISSN 0921-4534, DOI 10.1016/0921-4534(89)90087-7
Ключевые слова (''Своб.индексиров.''): ceramic materials--tin compounds--bulk superconductivity--high temperature superconductors--oxide superconductors--tin barium strontium yttrium copper oxide--superconducting materials
Аннотация: A high-Tc phase was found in the Sn-Ba-Sr-Y-Cu-O system. DC susceptibility data of Sn2Ba2Sr0.5Y0.5Cu3Ox show a single transition to bulk superconductivity with an onset temperature of 86 K. В© 1989.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrusheva T. N., Snezhko N. Yu., Belousov A. L., Rizhenkov A. V., Mikhlin Y. L., Kirik S. D., Bondarenko G. N., Zharkov S. M., Romanov A. A.
Заглавие : Transparent conductive ITO coatings obtained by pyrolysis of metal extracts
Место публикации : J. Appl. Chem. Sci. Int. - 2015. - Vol. 3, Is. 1. - P.21-28. - ISSN 2395-3705
Ключевые слова (''Своб.индексиров.''): indium-tin oxide--thin films--extraction-pyrolysis technique--liquid precursors--nanocrystalline structure
Аннотация: Thin films of indium-tin oxide (ITO) have been prepared by pyrolysis of liquid organic-extracts of indium and tin. The films were deposited on glass substrate in the atmospheric condition. Extraction-pyrolytic method adopted here uses cheap starting materials and provides the required stoichiometric ratio by mixing the stable liquid precursors in appropriate concentration. Thermal decomposition processes are induced in the narrow temperature range of 350–400°C. The zirconium-yttrium oxide (ZYO) sublayer was deposited on glass substrate in advance to provide homo epitaxial growth. This would induce reduction in intrinsic stress of the films due to matching in thermal expansion coefficient with ITO film. XPS studies showed the absence of impurity elements in these extraction-pyrolytic technique derived ITO films and the spectra is quite similar to that for ITO films deposited in vacuum environment. ITO film has a nanocrystalline structure with grain size of about 6 nm.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korshunov M. M., Zakharova E. V., Nekrasov I. A., Pchelkina Z. V., Ovchinnikov S. G.
Заглавие : The Fermi surface and the role of electronic correlations in Sm2-xCexCuO4
Коллективы :
Разночтения заглавия :авие SCOPUS: The Fermi surface and the role of electronic correlations in Sm 2-xCexCuO4
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2010. - Vol. 22, Is. 1. - Ст.15701. - ISSN 0953-8984, DOI 10.1088/0953-8984/22/1/015701
Примечания : Cited References: 35. - We would like to thank A A Kordyuk and I Eremin for useful discussions. The authors acknowledge support from RFBR (grants 08-02-00021, 10-02-00662, 08-02-91200 and 07-02-00226), the RAS programs on 'Low temperature quantum phenomena', 'Quantum physics of condensed matter' and 'Strongly correlated electrons solids', President of Russia (grants MK-614.2009.2 (IN) and MK-3227.2008.2 (ZP)), Scientific School (grant SS-1929.2008.2), Interdisciplinary UB-SB RAS project, Dynasty Foundation (ZP) and Russian Science Support Foundation (IN).
Предметные рубрики: T-C SUPERCONDUCTOR
IN-GAP STATES
SPIN CORRELATIONS
BAND
LA2-XSRXCUO4
EXCITATIONS
TRANSITION
EVOLUTION
SM2CUO4
OXIDES
Ключевые слова (''Своб.индексиров.''): antiferromagnetics--doping evolution--electron-doped--electronic correlation--emery model--experimental data--generalized tight bindings--high-t--hybrid scheme--magnetic orders--spin-liquid--tight binding model--two-regime--antiferromagnetism--cerium--cerium compounds--copper oxides--corundum--doping (additives)--fermi surface--fermions--tin--surfaces
Аннотация: Using a LDA + GTB (local density approximation + generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high-T-c material Sm2-xCexCuO4. Parameters of the minimal tight-binding model for this system (the so-called three-band Emery model) were obtained within the NMTO (Nth-order muffin-tin orbital) method. The doping evolution of the dispersion and the Fermi surface in the presence of electronic correlations was investigated in two regimes of magnetic order: short-range (spin-liquid) and long-range (antiferromagnetic metal). Each regime is characterized by the specific topologies of the Fermi surfaces and we discuss their relation to recent experimental data.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : DROKIN N. A., AKSENOVA E. Y., MAMALUI Y. A.
Заглавие : PHOTOCONDUCTIVITY IN TIN-DOPED MAGNETITE
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1984. - Vol. 26, Is. 6. - P1837-1838. - ISSN 0367-3294
Примечания : Cited References: 5
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tambasov I. A., Tarasov A. S., Volochaev M. N., Rautskii M. V., Myagkov V. G., Bykova L. E., Zhigalov V. S., Matsynin A. A., Tambasova E. V.
Заглавие : Weak localization and size effects in thin In2O3 films prepared by autowave oxidation
Коллективы : Russian Foundation for Basic Research [16-32-00302 MOJI_a, 15-02-00948-A, 16-03-00069-A]; Council for Grants of the President of the Russian Federation [SP-317.2015.1]; Program of Foundation for Promotion of Small Enterprises in Science and Technology ("UMNIK" Program) [6662GammaY2015, 9607GammaY/2015]
Место публикации : Physica E: Elsevier Science, 2016. - Vol. 84. - P.162-167. - ISSN 1386-9477, DOI 10.1016/j.physe.2016.06.005. - ISSN 1873-1759(eISSN)
Примечания : Cited References:70. - This study was supported by the Russian Foundation for Basic Research (Grants # 16-32-00302 MOJI_a, # 15-02-00948-A, # 16-03-00069-A), by the Council for Grants of the President of the Russian Federation (SP-317.2015.1), and by the Program of Foundation for Promotion of Small Enterprises in Science and Technology (No. 6662 Gamma Y2015, 9607 Gamma Y/2015) ("UMNIK" Program). Electron microscopic studies were performed on the equipment of CCU KSC SB RAS.
Предметные рубрики: SOLID-STATE SYNTHESIS
INDIUM TIN OXIDE
DOPED ZNO FILMS
OPTICAL-PROPERTIES
MAGNETIC-FIELD
NEGATIVE MAGNETORESISTANCE
CARBON NANOTUBES
TEMPERATURE
SEMICONDUCTOR
TRANSPORT
Ключевые слова (''Своб.индексиров.''): thin indium oxide films--weak localization--electron-electron--interaction--disordered semiconductors--nanostructured films--phase-coherent length
Аннотация: The negative magnetoresistance of thin In2O3 films, obtained by an autowave oxidation reaction, was detected within a temperature range of 4.2-80 K. The magnetoresistance was -1.35% at a temperature of 4.2 K and an external magnetic field of 1 T. A weak localization theory was used to explain the negative magnetoresistance and to determine the phase-coherence length in a temperature range of 4.2-80 K. The phase-coherence length was found to oscillate as the temperatures increased to around 30 K. From the maximum and minimum values of the oscillation of the phase-coherence length, it was suggested that the In2O3 film has two structure characteristic parameters. Transmission electron microscopy showed the structure of the thin In2O3 film to have structural features of a crystal phase- amorphous phase. It was found that the crystalline phase characteristic size was consistent with the maximum phase-coherence length and the amorphous phase characteristic size was consistent with the minimum phase-coherence length. It has been suggested that the temperature measurements of the magnetoresistance and the theory of weak localization can be used to evaluate the structural features of nanocomposite or nanostructured thin films. (C) 2016 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Udod L. V., Aplesnin S. S., Sitnikov M. N., Romanova O. B., Molokeev M. S.
Заглавие : Phase transitions in bismuth pyrostannate upon substitution of tin by iron ions
Место публикации : J. Alloys Compd. - 2019. - Vol. 804. - P.281-287. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2019.07.020
Примечания : Cited References: 44. - The reported study was funded by RFBR according to the research project № 18-52-00009 Bel_a; The reported study was funded by Russian Foundation for Basic Research , Government of Krasnoyarsk Territory , Krasnoyarsk Regional Fund of Science № 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 № 3.5743.2017/6.7.
Аннотация: The Bi2(Sn1-хFeх)2O7 (х = 0, 0.1, 0.2) compounds have been synthesized by the solid-state reaction technique. The structure of the synthesized compounds has been investigated in the temperature range of 80–500 K using the thermal expansion and ultrasound damping coefficients and IR spectroscopy. The shift -type structural transitions for the composition with х = 0.2 in the low-temperature region has been established. The effect of iron ions on the phase boundaries of the polymorphic transitions in the Bi2Sn2O7 compound has been observed. Softening of the phonon modes near the phase transitions at different iron concentrations has been found.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bykov A. A., Gokhfeld D. M., Savitskaya N. E., Terentjev K. Yu., Popkov S. I., Mistonov A. A., Grigoryeva N. A., Zakhidov A., Grigoriev, S., V
Заглавие : Flux pinning mechanisms and a vortex phase diagram of tin-based inverse opals
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [17-72-10067]
Место публикации : Supercond. Sci. Technol. - 2019. - Vol. 32, Is. 11. - Ст.115004. - ISSN 0953-2048, DOI 10.1088/1361-6668/ab3db7. - ISSN 1361-6668(eISSN)
Примечания : Cited References: 31. - The work was supported by the Russian Foundation for Basic Research, project no. 17-72-10067.
Предметные рубрики: SUPERCONDUCTIVITY
Аннотация: Three-dimensional periodic tin structures were synthesized by filling pores in silicon opals with a sphere diameter of 194 nm (Sn190) and 310 nm (Sn300). The samples were examined by the ultra-small-angle x-ray diffraction method, energy dispersive x-ray microanalysis and scanning electron microscopy. It was found that the inverse opal structure consists of tin nanoparticles inscribed in octahedral and tetrahedral pores with diameters of 128 nm and 70 nm for the sample Sn300, and 80 nm and 42 nm for the sample Sn190. The study of the magnetic properties of the samples by SQUID magnetometry showed that magnetization reversal curves exhibit hysteretic behavior. The mechanisms of magnetic flux pinning in the samples depend on the size of the tin nanoparticles. Tin nanoparticles in Sn300 behave like a classical type-I superconductor. The hysteretic behavior of the magnetization reversal curves at low magnetic fields is due to the formation of a network of superconducting contours in Sn300. These superconducting contours effectively trap the magnetic flux. The octahedral tin nanoparticles in Sn190 remain type-I superconductors, but smaller tetrahedral particles behave like type-II superconductors. Type-I and II superconducting particles in Sn190 lead to the coexistence of different mechanisms of flux pinning These are flux trapping by superconducting contours at low magnetic fields and flux pinning by tetrahedral particles due to the surface barrier at high magnetic fields.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Popkov S. I., Bykov A. A.
Заглавие : Analog of the intertype superconductivity in nanostructured materials
Место публикации : Physica C. - 2019. - Vol. 566. - Ст.1353526. - ISSN 09214534 (ISSN), DOI 10.1016/j.physc.2019.1353526
Примечания : Cited References: 21. - The authors are grateful to D.A. Balaev, N.E. Savitskaya, N.A. Grigorieva for fruitful discussions and to A.A. Mistonov for provided samples. The work is supported by the Russian Science Foundation (project no. 17-72-10067 ).
Аннотация: Magnetization hysteresis loops of tin samples with an inverted opal structure are presented. The sample formed by tin particles with the size of 70 and 128 nm is found to be a type-I superconductor. The tin sample formed by 80 and 42 nm particles demonstrates an analog of intertype superconductivity: features of both type-I and II superconductors are observed on the magnetization isothermal curves. A behavior of the irreversible and reversible magnetizations supports coexistence of type-I and II superconducting nanoparticles in this sample.
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