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Solid state synthesis and characterization of ferromagnetic nanocomposite Fe-In2O3 thin films / V. G. Myagkov [et al.] // J. Alloys Compd. - 2014. - Vol. 612. - P. 189-194, DOI 10.1016/j.jallcom.2014.05.176. - Cited References: 56 . - ISSN 0925-8388. - ISSN 1873-4669

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
HIGH-TEMPERATURE FERROMAGNETISM
   PHASE-FORMATION
   In2O
   OXIDE
   NANOPARTICLES
   CO
   SEMICONDUCTORS
   NANOCRYSTALS
   COMBUSTION
   SYSTEMS
Кл.слова (ненормированные):
Thermite reactions -- Reactive films -- Ferromagnetic nanocomposite films -- Transparent conducting oxides
Аннотация: We have successfully synthesized ferromagnetic Fe-In2O 3 nanocomposite thin films for the first time using the thermite reaction Fe2O3 + In = In2O3 + Fe. The initial In/Fe2O3 bilayers were obtained by the deposition of In layers on α-Fe2O3 films. The reaction occurs in a self-propagating mode in a homogeneous thermal film plane field at heating rates above 20 K/s and at temperatures above initiation temperature T[[d]]in[[/d]] ~ 180 °C. At heating rates lower than 20 K/s the mixing of the In and Fe2O3 layers occurs across the whole In/Fe2O3 interface and the synthesis of the ferromagnetic α-Fe phase starts above the initiation temperature T[[d]]in[[/d]] = 180 °C. X-ray diffraction, X-ray photoelectron spectroscopy, Mossbauer spectroscopy, transmission electron microscopy and magnetic measurements were used for phase identification and microstructure observation of the synthesized Fe-In2O3 samples. The reaction products contain (1 1 0) textured α-Fe nanocrystals with a diameter around 100 nm and surrounded by an In2O3 matrix. These results enable new efficient low-temperature methods for synthesizing ferromagnetic nanocomposite films containing ferromagnetic nanoclusters embedded in transparent conducting oxides. © 2014 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660049, Russia

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Mikhlin, Yu. L.; Volochaev, M. N.; Bondarenko, G. N.; Бондаренко, Галина Николаевна
}
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Reversible UV induced metal-semiconductor transition in In2O3 thin films prepared by autowave oxidation / I. A. Tambasov [et al.] // Semicond. Sci. Technol. - 2014. - Vol. 29, Is. 8. - Ст. 82001, DOI 10.1088/0268-1242/29/8/082001. - Cited References: 56. - This work was supported by the Federal Target Program through Contract No 14.513.11.0023; the Russian Foundation for Basic Research, Project No. 14-02-31156. . - ISSN 0268-1242. - ISSN 1361-6641

РУБ Engineering, Electrical & Electronic + Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
TRANSPARENT CONDUCTING OXIDES
   Ga-DOPED ZnO
   LOW-TEMPERATURE
   HIGH-PERFORMANCE
   SUBSTRATE-TEMPERATURE
   INSULATOR-TRANSITION
   ROOM-TEMPERATURE
   TRANSISTORS
   COMBUSTION
   PHOTOREDUCTION
Кл.слова (ненормированные):
indium oxide thin films -- autowave oxidation -- metal-semiconductor transition -- UV irradiation -- photoreduction
Аннотация: We have prepared thin indium oxide films by the autowave oxidation reaction. Measurements of temperature dependence of resistivity, Hall carrier concentration and Hall mobility have been conducted in the temperature range 5-272 K. Before ultraviolet (UV) irradiation, the indium oxide film had a semiconductor-like temperature dependence of resistivity. and the ratio of rho (5 K)/rho(272 K) was very limited (similar to 1.2). It was found that after UV irradiation of the In2O3 film, the metal-semiconductor transition (MST) was observed at similar to 100 K. To show that this MST is reversible and repeatable, two full cycles of 'absence of MST-presence of MST' have been done using UV irradiation (photoreduction) as the induced mechanism and exposure to an oxygen environment as the reversible mechanism, respectively. MST in transparent conducting oxide (TCO) is possibly associated with the undoped structure of metal oxide, which has some disorder of oxygen vacancies. It was suggested that reversible UV induced metal-semiconductor transition would occur in other TCOs.

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

Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Myagkov, V. G.; Мягков, Виктор Григорьевич; Tarasov, A. S.; Тарасов, Антон Сергеевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Nemtsev, I. V.; Немцев, Иван Васильевич; Eremin, E. V.; Еремин, Евгений Владимирович; Yozhikova, E. V.; Federal Target Program [14.513.11.0023]; Russian Foundation for Basic Research [14-02-31156]
}
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Methane oxidation over A-site ordered and disordered Sr0.8Gd0.2CoO3−δ perovskites / S. N. Vereshchagin [et al.] // Chem. Commun. - 2014. - Vol. 50, Is. 46. - P. 6112-6115, DOI 10.1039/c4cc00913d. - Cited References: 20. - The authors acknowledge the financial support from SB RAS project N 38 (2012) and RFBR grant 13-02-00358. . - ISSN 1359-7345. - ISSN 1364-548X

РУБ Chemistry, Multidisciplinary
Рубрики:
MEMBRANE REACTORS
   OXYGEN
   OXIDES
   PERFORMANCE
   COMBUSTION
   FEATURES
   PHASES
Аннотация: A tetragonal phase Sr0.8Gd0.2CoO3−δ with ordered Gd3+/Sr2+ ions and oxygen vacancy sites is found to be about five times less active in the reaction of methane combustion than a quenched cubic perovskite phase with randomly distributed (disordered) Gd3+/Sr2+ ions over the A-sites of the crystal lattice.

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Держатели документа:
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Vereshchagin, S. N.; Solovyov, L. A.; Соловьев, Леонид Александрович; Rabchevskii, E. V.; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Anshits, A. G.; Аншиц, Александр Георгиевич; SB RAS project [38]; RFBR [13-02-00358]
}
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New method for regulating the activity of ABO3 perovskite catalysts / S. N. Vereshchagin [et al.] // Kinet. Catal. - 2015. - Vol. 56, Is. 5. - P. 640-645, DOI 10.1134/S0023158415040199. - Cited References:23. - This work was supported in part by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (grant no. NSh-2886.2014.2). . - ISSN 0023. - ISSN 1608-3210. -

РУБ Chemistry, Physical
Рубрики:
MEMBRANE REACTORS
   METHANE COMBUSTION
   OXIDATION
   OXIDES
   OXYGEN
   PERFORMANCE
   FEATURES
   PHASES
   CO
Кл.слова (ненормированные):
perovskite -- cobalt -- methane -- deep oxidation -- oxidative condensation
Аннотация: A new possibility of changing the activity and selectivity of perovskite catalysts in the oxidative conversion of methane was demonstrated using the Sr x Gd1–x CoO3–δ (0.5 < x < 0.9) compounds as an example. It was established that, at the same chemical composition, the disordering of Sr2+/Gd3+ ions over the A positions of the crystal structure led to a significant increase in activity in the deep oxidation reaction of CH4, as compared with the samples with an ordered distribution of cations.

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Публикация на русском языке Новый способ регулирования активности катализаторов АВО3 со структурой перовскита [Текст] / С. Н. Верещагин [и др.] // Кинетика и катализ. - М. : Наука, 2015. - Т. 56 № 5. - С. 649-664

Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Vereshchagin, S. N.; Solov'ev, L. A.; Соловьев, Леонид Александрович; Rabchevskii, E. V.; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Anshits, A. G.; Аншиц, Александр Георгиевич; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools [NSh-2886.2014.2]
}
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Surface modification of detonation nanodiamonds with platinum and palladium nanoparticles / V. G. Isakova [et al.] // Int. J. Chem. - 2015. - Vol. 7, No. 1. - P. 1-9, DOI 10.5539/ijc.v7n1p1. - Cited References: 38 . - ISSN 1916-9698
Кл.слова (ненормированные):
detonation-synthesized nanodiamond supports -- platinum and palladium nanoparticles -- combustion -- chemical modific -- DND additional purification
Аннотация: Acetylacetonates of platinum group metals (M(acac)n, acac= CH3COCHCOCH3,n - oxidation state of metal) are the most suitable precursors for use in highly effective MOCVD (metal-organic chemical vapor deposition) processes because of their thermal properties, low price of initial ligand and accessible synthesis methods. In this study we have developed a simple, scalable inexpensive, MOCVD-like approach to the deposition of Pt and Pd nanoparticle dispersions on powder detonation nanodiamonds (DND) using combustion in air of powder mixtures of DND with Pt and Pd acetylacetonates. This one-step process requires no specialized apparatus, and is conducted at mild temperatures (180°C – 250°C). The substrate surface of DND initiates chemical thermal destruction of precursor and deposition of nanoparticle networks composed of constituent particles. DND-supported Pd and Pt nanoparticles with their loading being from 10 and 5wt. % were obtained the average of particle size 20-25 nm and 7-10nm decreases with decreasing the metal loading. For additional purification and disaggregation of the commercial detonation-synthesized nanodiamond (DNDcomm) the method of annealing of the powder mixtures DNDcomm with Na(acac) have been used. The purified diamond nanoparticulates (DND), as well as DNDcomm, Pt/DND and Pd/DND, were subjected to physicochemical characterizations, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis.

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Доп.точки доступа:
Isakova, V. G.; Исакова, Виктория Гавриловна; Isakov, V. P.; Lyamkin, A. I.; Zharikova, N. V.; Yunoshev, A. S.; Nemtsev, I. V.; Немцев, Иван Васильевич
}
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Self-propagating high-temperature synthesis and solid-phase reactions in bilayer thin films / V. G. Myagkov [et al.] // Tech. Phys. - 1998. - Vol. 43, Is. 10. - P. 1189-1192, DOI 10.1134/1.1259177. - Cited References: 14 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
COMBUSTION
Аннотация: Self-propagating high-temperature synthesis (SHS) in Al/Ni, Al/Fe, and Al/Co bilayer thin films is investigated. It is established that SHS is achieved in thin films at initiation temperatures 300-350 degrees lower than in powders. The mechanism of SHS in thin films is similar to the process of explosive crystallization. It is shown that at the initial stage solid-phase reactions arising on the contact surface of condensate films can be self-propagating high-temperature synthesis. SHS could find application in different technologies for obtaining film components for microelectronics. (C) 1998 American Institute of Physics. [S1063-7842(98)01010-1].

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

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Mal'tsev, V. K.; Maltsev, V. K.
}
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The unusual size dependence of magnetic properties of nickel zinc ferrite nanoparticles synthesized by combustion method / O. A. Li [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. P9.5. - P. 391 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
nickel zinc ferrite -- ferrite nanoparticles -- superparamagnetism

Доп.точки доступа:
Li, O. A.; Ли О.А.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Chun-Rong Lin; Hung-Yi Chen; Kai-Wun Wu; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; 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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Magnetic properties and structural characteristics of BaFe12O19 hexaferrites synthesized by the zol-gel combustion / V. A. Zhuravlev [et al.] // Russ. Phys. J. - 2018. - Vol. 60, Is. 11. - P. 1946-1954, DOI 10.1007/s11182-018-1307-8. - Cited References: 12. - The work on synthesis of the materials was supported in part by the Federal Agency for Scientific Organizations of Russia (Project V.44.3.4 No. АААА-А17-117070420014-9). The measurement of magnetic and structural parameters of the materials was supported in part by the Program for Increasing TSU Competitiveness among the Leading World Scientific-Educational Centers and the Russian Foundation for Basic Research (Grant No. 16-03-00256). . - ISSN 1064-8887
Кл.слова (ненормированные):
zol-gel combustion method -- nanostructured hexaferrites -- magnetization curve -- saturation magnetization -- ferromagnetic resonance -- magnetocrystalline anisotropy
Аннотация: The phase structure, structural parameters, and basic magnetic characteristics of BaFe12O19 hexaferrites prepared by the zol-gel combustion method with subsequent annealing at a temperature of 850°С for 6 h are investigated. The influence of the organic fuel type on the properties of synthesized materials is analyzed. Values of the saturation magnetization and the anisotropy field are determined. It is established that they depend on the organic fuel type. It is shown that powders synthesized with citric acid used as a fuel have the largest particle sizes and the highest saturation magnetization.

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Публикация на русском языке Магнитные свойства и структурные характеристики синтезированных методом золь-гель-горения гексаферритов BaFe12O19 [Текст] / В. А. Журавлев [и др.] // Изв. вузов. Физика. - 2017. - Т. 60 № 11. - С. 87-94

Держатели документа:
National Research Tomsk State University, Tomsk, Russian Federation
Department of Structural Macrokinetics of the Tomsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russian Federation
L. V. Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zhuravlev, V. A.; Itin, V. I.; Minin, R. V.; Lopushnyak, Y. M.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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Influence of different organic fuels on the phase composition, structure parameters and magnetic properties of hexaferrites BaFe12O19 synthesized by the sol-gel combustion / V. A. Zhuravlev [et al.] // J. Alloys Compd. - 2019. - Vol. 771. - P. 686-698, DOI 10.1016/j.jallcom.2018.08.294. - Cited References: 56. - This work was performed under the Program for Improving Tomsk State University Competitiveness among the World's Leading Scientific and Educational Centers. Part of the work related to the synthesis of the materials was carried out within the framework of the state task of the FASO (Project No 0365-2018-0003 ) for the Tomsk Scientific Center, SB RAS. Part of the work related to the study of magnetization curves was partially funded by RFBR Grant No 16-02-00563. . - ISSN 0925-8388
Кл.слова (ненормированные):
Sol-gel combustion -- Nanocrystalline hexaferrites -- Magnetization curve -- Ferromagnetic resonance -- Magnetocrystalline anisotropy
Аннотация: Phase composition, structure parameters, morphology and basic magnetic characteristics – the specific saturation magnetization values and the magnetic anisotropy fields of the nanostructured BaFe12O19 powders prepared by the sol-gel combustion with the following annealing at 850°С for six hours are investigated. As organic fuels the following materials are used: carbamide (CON2H4), sucrose (C12H22O11), glycine (C2H5NO2) and citric acid (C6H8O7). The influences of the type of the organic fuels on the properties of synthesized materials are analysed. It is shown that in the powders obtained the distribution of particles on the size, the values of saturation magnetizations and the anisotropy fields depend on the fuel type. The sample synthesized using carbamide has the smallest content of the target phase BaFe12O19, the widest particle size distribution and the lowest value of the saturation magnetization in comparison with the other samples. The narrowest distribution of the particles on the size and the highest value of the specific saturation magnetization are observed in the material synthesized with the use of citric acid as an organic fuel. A comparison of the experimental hysteresis loops with the calculated magnetization curves is made. It is shown that the paraprocess plays a significant role in the magnetization processes of the synthesized materials (χpara. ≈ 0.125*10−3 cm3/g). A technique for determining the values of the anisotropy fields and the magnetomechanical ratios from experiments on FMR is also described. Calculations of the magnetization curve and the ferromagnetic resonance line of hexaferrites powders with uniaxial anisotropy were carried out in the independent grains approach.

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Держатели документа:
Tomsk State University, Tomsk, 634050, Russian Federation
Tomsk Scientific Center, SB RAS, Tomsk, 634021, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zhuravlev, V. A.; Itin, V. I.; Minin, R. V.; Lopushnyak, Y. M.; Svetlichnyi, V. A.; Lapin, I. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Lilenko, I. Y.
}
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10.

Tunable magnetic properties of Ni-doped CoFe2O4 nanoparticles prepared by the sol–gel citrate self-combustion method / A. Omelyanchik [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 476. - P. 387-391, DOI 10.1016/j.jmmm.2018.12.064. - Cited References: 35. - The reported study was funded partially by RFBR according to the research project 17-32-50202\17. The discussion of results has been made possible through the mobility grant provided by the 5 top 100 Russian Academic Excellence Project at the Immanuel Kant Baltic Federal University. VR thanks the Ministry of Education and Science of the Russian Federation in the framework of Government assignment 3.9002.2017/6.7. . - ISSN 0304-8853
Кл.слова (ненормированные):
Ferrites materials -- Mixed ferrites -- Nanostructured materials -- Magnetic properties
Аннотация: The nanostructured spinel ferrites with complex stoichiometry are an important family of the materials in a number of applications, especially in electronics through their good electrical and magnetic properties. In the framework of this study, a set of mixed cobalt and nickel ferrites was prepared with the sol–gel self-combustion route. The structural and morphological features of particles were studied with X-ray diffraction (XRD), Scanning Transmission Electron Microscopy (STEM) and Energy Dispersive X-ray analysis (EDX) techniques. The prepared particles show a crystalline nature with a monotonic distribution of the elements and particles size distribution in the range of 17–29 nm. The obtained particles demonstrate good magnetic properties with tunable saturation magnetization and magnetic anisotropy, i.e., coercivity depending on chemical composition.

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Держатели документа:
Immanuel Kant Baltic Federal University, Kaliningrad, Russian Federation
Department of Materials Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National University of Science and Technology MISiS, Moscow, Russian Federation
Istituto di Struttura della Materia – CNR, Monterotondo Scalo, RM, Italy
Department of Chemistry and Industrial Chemistry (DCIC), Universita of Genova, Genova, Italy

Доп.точки доступа:
Omelyanchik, A.; Singh, G.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Rodionova, V.; Peddis, D.
}
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