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    In situ transmission electron microscopy and electron diffraction investigation of solid-state reactions and atomic ordering in Cu/Au bilayer nanofilms / S. M. Zharkov [et al.] // J. Sib. Fed. Univ. Chem. - 2013. - Vol. 6, Is. 3. - P. 230-240 ; Журн. СФУ. Сер. "Химия"
   Перевод заглавия: In situ-исследования твердофазных реакций и атомного упорядочения в двухслойных нанопленках Cu/Au методами просвечивающей электронной микроскопии и дифракции электронов
Кл.слова (ненормированные):
Cu/Au nanofilm -- Intermetallics -- Solid state reaction -- Phase transition -- Atomic ordering -- Superstructure -- нанопленка Cu/Au -- интерметаллиды -- твердофазная реакция -- фазовый переход -- атомное упорядочение -- сверхструктура
Аннотация: Solid-state reaction processes and atomic ordering in Cu/Au bilayer nanofilms (with the atomic ratio Cu:Au≈50:50) have been studied in situ by the methods of transmission electron microscopy and electron diffraction in the process of heating from room temperature up to 700 ºС at a heating rate of 4-8 ºС/min. The solid-state reaction between the nanolayers of copper and gold has been established to begin at 180 ºС. The process of atomic ordering has been shown to start simultaneously with the process of the formation of the disordered phase of Cu50Au50 at 245 ºС. The formation processes of the ordered phases of: CuAuI (L10 superstructure) and CuAuII (long period superstructure) have been studied, as well as the phase transition processes: disorder - order (the transition of the disordered structure into the ordered one) and order - disorder (the transition of the ordered structure into the disordered one).
Методами просвечивающей электронной микроскопии и дифракции электронов проведены in situ-исследования процессов твердофазных реакций и атомного упорядочения в двухслойных нанопленках Cu/Au (с атомным соотношением Cu:Au≈50:50) при нагреве от комнатной температуры до 700 ºС при скорости нагрева 4-8 ºС/мин. Установлено, что твердофазная реакция между нанослоями меди и золота начинается при 180 ºС. Показано, что процесс атомного упорядочения начинается одновременно с процессом формирования неупорядоченной фазы Cu50Au50 при 245 ºС. Исследованы процессы формирования атомно-упорядоченных фаз: CuAuI (L10 сверхструктура) и CuAuII (длинно-периодическая сверхструктура), а также процессы фазовых переходов беспорядок-порядок (переход неупорядоченной структуры в атомно-упорядоченную) и порядок-беспорядок (переход атомно-упорядоченной структуры в неупорядоченную)

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Доп.точки доступа:
Zharkov, S. M.; Жарков, Сергей Михайлович; Moiseenko, E. T.; Моисеенко, Евгений Тимофеевич; Altunin, R. R.; Алтунин, Роман Русланович; Zeer, G. M.

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    Solid-state reactions in Fe/Si multilayer nanofilms / S. M. Zharkov [et al.] // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 144-149, DOI 10.4028/www.scientific.net/SSP.215.144. - Cited References: 16. - The work was supported by the Presidium of RAS (project No. 24.34), the Russian Foundation for Basic Research (grant #13-02-01265) . - ISSN 1662-9779. - ISSN 978-30383
   Перевод заглавия: Твердофазные реакции в многослойных пленках Fe/Si
Кл.слова (ненормированные):
Fe/Si multilayer nanofilm -- intermetallics -- solid state reaction -- phase transition -- magnetic properties -- electron diffraction -- transmission electron microscopy
Аннотация: Solid-state reaction processes in Fe/Si multilayer nanofilms have been studied in situ by the methods of transmission electron microscopy and electron diffraction in the process of heating from room temperature up to 900ºС at a heating rate of 8-10ºС/min. The solid-state reaction between the nanolayers of iron and silicon has been established to begin at 350-450ºС increasing with the thickness of the iron layer.

Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Zharkov, S. M.; Жарков, Сергей Михайлович; Altunin, R. R.; Алтунин, Роман Русланович; Moiseenko, E. T.; Моисеенко, Евгений Тимофеевич; Zeer, G. M.; Зеер Г. М.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)
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Ni-doping effect of Mg(0 0 0 1) surface to use it as a hydrogen storage material / A. V. Kuklin [et al.] // J. Alloys Compd. - 2014. - Vol. 609. - P. 93-99, DOI 10.1016/j.jallcom.2014.04.160. - Cited References: 38 . - ISSN 0925-8388. - ISSN 1873-4669

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
INITIO MOLECULAR-DYNAMICS
   AUGMENTED-WAVE METHOD
   MINIMUM ENERGY PATHS
   ELASTIC BAND METHOD
   METAL-HYDRIDES
   SADDLE-POINTS
   MAGNESIUM
   Mg
   TRANSITION
   Pd
Кл.слова (ненормированные):
Hydrogen absorbing materials -- Intermetallics -- Diffusion -- DFT -- Mg-based hydride
Аннотация: A detailed study of Ni-doped Mg(0 0 0 1) surface performed by PAW method and the gradient corrected density functional GGA-PBE within the framework of generalized Kohn–Sham density functional theory (DFT) is presented in this work. Structural and electronic properties of magnesium surface interaction with nickel for the purpose of such compounds use for creation of hydrogen storage matrixes were investigated here. Choice of the PBE functional was caused by the good accordance of its prediction of the cell parameters with experimental results. It was shown that Ni atoms prefer to substitute for Mg atoms. Using NEB method, the diffusion barrier was calculated, and the most probable reaction path was established. In particular, when the Ni atom dopes the magnesium surface, it can migrate to the bulk and substitute for Mg in subsurface layers. Also a possibility of nickel cluster formation on clean surface of magnesium was examined. The kinetic factors hinder the movement of the nickel atoms to each other and make problematic the formation of clusters. The studies presented here showed that the diffusion barriers of the nickel atom migration from the cluster on the surface to the bulk of magnesium are 1.179 eV and 1.211 eV for the forward and reverse reactions, respectively. Therefore an improvement of the hydrogenation properties of Ni-doped magnesium surface depends on deposition not of the individual atoms, but their clusters. Hydrogenation of Ni cluster doping the magnesium surface was investigated. Initially Kubas complexes arise on the Ni cluster with hydrogen–hydrogen bond lengths equal to 0.80–0.87 Å. Next the cluster needs to be saturated by hydrogen atoms to allow them later to migrate from cluster to magnesium.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia

Доп.точки доступа:
Kuklin, A. V.; Куклин, Артем Валентинович; Kuzubov, A. A.; Кузубов, Александр Александрович; Krasnov, P. O.; Краснов, Павел Олегович; Lykhin, A. O.; Tikhonova, L. V.
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    Moiseenko, E. T.
    In situ electron diffraction and resistivity characterization of solid state reaction process in Cu/Al bilayer thin films / E. T. Moiseenko, R. R. Altunin, S. M. Zharkov // Metall. Mat. Trans. A. - 2020. - Vol. 51, Is. 3. - P. 1428-1436, DOI 10.1007/s11661-019-05602-5. - Cited References: 52. - The authors wish to thank the financial support from the Russian Science Foundation (Grant #18-13-00080) . - ISSN 1073-5623
   Перевод заглавия: In situ исследования процесса твердофазной реакции в двухслойных тонких пленках Cu/Al методами дифракции электронов и изменения электросопротивления
Кл.слова (ненормированные):
Aluminum alloys -- Binary alloys -- Crystallites -- Electric conductivity -- Electron diffraction -- Intermetallics -- Solid state reactions -- Thin films
Аннотация: Solid state reaction processes in Cu/Al thin films have been studied using the methods of in situ electron diffraction and electrical resistivity measurements. The solid state reaction in the Cu/Al thin films has been found to begin already at 88 °C with the formation of the Al2Cu phase in the process of thermal heating in vacuum. The phase sequence at the solid state reaction in the films under study has been determined to be the following: Al2Cu → AlCu → Al4Cu9. A model has been suggested for describing the initial formation stage of intermetallic compounds at the solid state reaction in Cu/Al thin films. According to this model, at the initial stage, the intermetallic compounds are formed as separate crystallites at the interface in the Cu/Al thin films. The suggested model can be applied both to the formation of the first phase, Al2Cu, and to the subsequent phases: AlCu and Al4Cu9. For the Al4Cu9 phase the temperature coefficient of the electrical resistivity has been determined to be equal to αAl4Cu9= 1.1 × 10−3 K−1.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Altunin, R. R.; Zharkov, S. M.; Жарков, Сергей Михайлович
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Formation of the Cu6Sn5 intermetallics in Cu/Sn thin films / L. E. Bykova, S. M. Zharkov, V. G. Myagkov [et al.] // Phys. Solid State. - 2022. - Vol. 64, Is. 2. - P. 33-37, DOI 10.1134/S1063783422010048. - Cited References: 16. - The study was supported by the Russian Foundation for Basic Research, project no. 19-43-240003. The electron microscopy study was carried out at the Krasnoyarsk Regional Center for Collective Use of the Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences and at the Laboratory of Electron Microscopy of the Center for Collective Use of the Siberian Federal University within the state assignment of the Ministry of Science and Higher Education of the Russian Federation, research theme code FSRZ-2020-0011 . - ISSN 1063-7834
Кл.слова (ненормированные):
thin films -- Cu6Sn5 intermetallic -- transmission electron microscopy -- electron diffraction
Аннотация: The formation of the Cu6Sn5 intermetallic in Sn(55nm)/Cu(30nm) thin-film bilayers has been studied upon heating the film sample from room temperature to 300°C directly in a column of a transmission electron microscope in the electron diffraction mode with recording electron diffraction patterns. The thin films synthesized by the solid-state reaction have been found to be single-phase and consist of the η-Cu6Sn5 hexagonal phase (95‒260°C). It has been suggested basing on the effective interdiffusion coefficient (5 × 10‒16 m2/s) estimated in the course of the reaction that the main mechanism of the formation of the Cu6Sn5 thin films is diffusion along grain boundaries and dislocations.

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Публикация на русском языке Формирование интерметаллида Cu6Sn5 в тонких пленках Cu/Sn [Текст] / Л. Е. Быкова, С. М. Жарков, В. Г. Мягков [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 12. - С. 2205-2209

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Bykova, L. E.; Быкова, Людмила Евгеньевна; Zharkov, S. M.; Жарков, Сергей Михайлович; Myagkov, V. G.; Мягков, Виктор Григорьевич; Balashov, Yu. Yu.; Балашов, Юрий Юрьевич; Patrin, G. S.; Патрин, Геннадий Семёнович
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Solid-state synthesis, magnetic and structural properties of epitaxial D03-Fe3Rh(001) thin films / V. G. Myagkov, L. E. Bykova, V. S. Zhigalov [и др.] // Intermetallics. - 2023. - Vol. 157. - Ст. 107871, DOI 10.1016/j.intermet.2023.107871. - Cited References: 27. - The authors are grateful to L.A. Solovyov for carrying out the XRD φ-scan experiments and I.V. Nemtsev for the measurements of the sample composition. The work is partially based upon the experiments performed at Krasnoyarsk Regional Center of Research Equipment of Federal Research Center « Krasnoyarsk Science Center SB RAS». This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors . - ISSN 0966-9795. - ISSN 1879-0216
Кл.слова (ненормированные):
Thin films -- Solid-state synthesis -- FeRh alloys -- D0 structure -- Magnetic properties -- Magnetic anisotropy
Аннотация: Here we first report on the formation of epitaxial D03-Fe3Rh(001) films grown during solid-state reaction in Rh/Fe(001) bilayers on MgO(001) substrates. Samples of the Fe68Rh32 composition above 400 °C showed the formation of a new ordered phase, in addition to the ordered B2–FeRh phase (space group Pm-3m, lattice constant a = 0.2993 nm), which becomes the dominant phase in Fe76Rh24 samples. These results and the results of the asymmetrical XRD φ-scan prove that the new ordered phase is the ordered D03-Fe3Rh(001) phase (space group Fm-3m, lattice constant a = 0.5888 nm), forming a cube-on-cube orientation relationship with respect to the MgO(001) substrate. The D03-Fe3Rh sample is a soft magnetic material with high saturation magnetization.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Bondarenko, G. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
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    Thermokinetic study of intermetallic phase formation in an Al/Cu multilayer thin film system / E. T. Moiseenko, V. V. Yumashev, R. R. Altunin [et al.] // Materialia. - 2023. - Vol. 28. - Ст. 101747, DOI 10.1016/j.mtla.2023.101747. - Cited References: 53. - This work was supported by the Russian Science Foundation under grant # 22-13-00313 . - ISSN 2589-1529
   Перевод заглавия: Термокинетическое исследование образования интерметаллических фаз в многослойной тонкопленочной системе Al/Cu
Кл.слова (ненормированные):
Intermetallics -- Thin film -- Solid-state reaction -- Kinetics -- Differential scanning calorimetry -- Electron diffraction
Аннотация: The solid-state reaction process in a multilayer thin film system (Al/Cu)50 has experimentally been studied using the methods of simultaneous thermal analysis (STA) and in situ electron diffraction. A detailed kinetic analysis of the phase formation processes during the solid-state reaction has shown that the observed solid-state transformations can be described by a statistically significant kinetic model where each stage corresponds to the reaction of the n-th order with autocatalysis. The low-temperature stage has been demonstrated to be attributable to the formation of the θ-Al2Cu phase, with the medium-temperature and high-temperature ones corresponding to the α2-AlCu3 and γ1-Al4Cu9 phases, respectively. The kinetic parameters for the formation of the phases θ-Al2Cu, α2-AlCu3 and γ1-Al4Cu9 have been determined. It has been shown that the kinetic model describing the solid-state reaction in the Al–Cu multilayer thin film system is in best agreement with the experimental data in the case of a competition between the formation stages of the α2-AlCu3 and γ1-Al4Cu9 phases.

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Держатели документа:
Siberian Federal University, 660041 79 Svobodny ave., Krasnoyarsk, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Akademgorodok 50/24, 660036 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Moiseenko, E. T.; Yumashev, V. V.; Altunin, R. R.; Solovyov, L. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Belousov, O. V.; Zharkov, S. M.; Жарков, Сергей Михайлович
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