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Приходько, Кирилл Евгеньевич

Организационные подразделения

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Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.

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Приходько

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Кирилл Евгеньевич

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Теперь показываю 1 - 10 из 18

Только метаданные
Control of Superconducting Transitions in Nanowires Using Galvanically Uncoupled Gates for Designing Superconductor-Based Electronic Devices
(2020) Gurovich, B. A.; Kutuzov, L. V.; Goncharov, B. V.; Prikhod'ko, K. E.; Приходько, Кирилл Евгеньевич
© 2020, Pleiades Publishing, Ltd.Abstract: A possibility of contactless switching of an NbN nanowire from superconducting to normal state by passing a current through a gate located at a certain distance from the nanowire is demonstrated. The gate, being isolated from the nanowire by an Al2O3 layer, contains an integrated resistance formed by ion irradiation. Dependences of the minimum power released in the gate that is sufficient for nanowire to pass to the normal state on the dc current through the nanowire are experimentally obtained. A signal inverter containing three successive cascades is developed based on this principle. This design shows that the proposed approach can be used to form a logic element base for cryogenic computing.
Только метаданные
Radiation nanotechnology for selective modifications of atomic composition and properties of thin film materials
(2019) Dementyeva, M. M.; Gurovich, B. A.; Kutuzov, L. V.; Goncharov, B. V.; Prikhodko, K. E.; Приходько, Кирилл Евгеньевич
© Published under licence by IOP Publishing Ltd.We have demonstrated using of ion beam irradiation to control the atomic composition and properties of thin film materials by three different ways. Selective removal of atoms (SRA) technique allows us to transform Co3O4 to Co. By EELS on cross-section samples in STEM mode it was shown that target depth recovery profile has no monotonic character that proved the radiation nature of SRA process. Selective displacement of Atoms (SDA) technique under oxygen ion irradiation was used to control the critical current of ultrathin superconductive NbN film that can have an implementation during new cryogenic logic device design.
Только метаданные
Creation of thin superconducting MoCN thin film by cathode sputtering technique as a basic material for functional cryogenic nanoelements
(2019) Goncharov, B. V.; Gurovich, B. A.; Dementyeva, M. M.; Olshansky, E. D.; Prikhodko, K. E.; Приходько, Кирилл Евгеньевич
© Published under licence by IOP Publishing Ltd.Thin MoCN films were synthesized by a method of cathode sputtering of mosaic Mo-C targets by nitrogen ions at temperature of 800°C on substrates of the oxidized silicon. The temperature dependences of electrical resistance of the films in the range of 4.2-300°K were measured. Volt-ampere characteristics of the films and critical current density vs film thickness were obtained at a temperature of 4.2°K. The microstructure and film-depth chemical composition profiles of thin films were investigated by analytical techniques of the transmission electron microscopy (HRTEM, EELS) on a cross-section samples made by the focused ion beam (FIB). It was established that MoCN thin film at a thickness of 8 nm contained MoC and Mo5N6 layers. The high density of critical current in these films indicated prospects of their application in the field of cryogenic nanotechnologies.
Только метаданные
Activator segregation and micro-luminescence properties in GAGG:Ce ceramics
(2021) Dosovitskiy, G.; Dubov, V.; Karpyuk, P.; Volkov, P.; Prikhodko, K.; Приходько, Кирилл Евгеньевич
© 2021ввCeramic scintillators are promising due to their potentially low cost. Here, we report on our study of Ce-doped ceramics. Typical garnet-type ceramics Gd2.97Ce0.03Al2Ga3O12 was fabricated for the study from co-precipitated powders by high-temperature sintering in air. Its structure and composition are characterized using Scanning Electron Microscope (SEM) imaging, Transmission Electron Microscopy (TEM), Electron Energy Loss Spectroscopy (EELS), Electron Backscattered Diffraction (EBSD) mapping, X-Ray Diffraction (XRD) and X-ray Absorption Near Edge Structure (XANES) measurements. The spatial distribution of luminescence properties at the micro-level is studied using scanning confocal microscopy. Cerium segregation at the grain boundaries was revealed by compositional characterization and is in line with enhanced Ce3+ photoluminescence observed at the boundaries. Meanwhile, no excess partitioning of Ce4+ ions at the grain boundaries is observed. It is found that most of Ce ions in the ceramics are stabilized in the state Ce3+, what is encouraging in view of the further development of GAGG:Ce ceramics as a promising luminescence material for lighting and scintillator application.
Только метаданные
Creation of Thin Films of NbN at Room Temperature of the Substrate
(2021) Gurovich, B. A.; Goncharov, B. V.; Kutuzov, L. V.; Stolyarov, L. V.; Prikhod'ko, K. E.; Приходько, Кирилл Евгеньевич
© 2021, Pleiades Publishing, Ltd.Abstract: Magnetron sputtering is used for preparing thin NbN films. The films are deposited on sapphire substrates at temperatures from 20 to 300°C. The superconducting transition temperature for various samples is in the range of 8–14 K depending on the substrate temperature during deposition. The critical current density jc is in the range of 0.8–8 MA/cm2, which makes it possible to use these films to create multilayer structures due to the absence of anneals, which each underlying layer of structures is subjected to during the deposition of each subsequent layer.
Только метаданные
Integrated cryogenic resistors formed from NbN thin film under ion beam irradiation
(2019) Gurovich, B. A.; Goncharov, B. V.; Dementyeva, M. M.; Kutuzov, L. V.; Prikhodko, K. E.; Приходько, Кирилл Евгеньевич
© Published under licence by IOP Publishing Ltd.Niobium nitride ultrathin films were synthesized by cathode sputtering technique. The cryogenic resistors built in the superconducting nanowire were formed using the radiation technology developed in National Research Centre "Kurchatov Institute". This technique was based on the transformation of NbN superconducting film to a normal state (at 4.2K) under the composite ion beam irradiation through the resistive mask. The formation of the cryogenic resistors in the broad range of values was demonstrated.
Только метаданные
Creation of Elements from NbN for Logical Devices of Classical Cryo-Computers
(2021) Gurovich, B. A.; Prikhodko, K. E.; Kutuzov, L. V.; Goncharov, B. V.; Приходько, Кирилл Евгеньевич
A method is described that allows one to reduce the critical current and switching power of a short nanowire from a superconducting state to a normal state by embedding a section of a normal metal into the nanowire. This effect results from the local heating of the superconducting wire due to the heat released in the normal metal. An integrated resistor is created from the original NbN using ion irradiation through a mask. The obtained values of switching powers allow designing multilayer logical elements without galvanic coupling for classical cryo-computers.
Только метаданные
Application of Electron Energy-Loss Spectroscopy for Analysis of the Microstructure of Reactor Materials
(2021) Dement'eva, M. M.; Prikhod'ko, K. E.; Приходько, Кирилл Евгеньевич
© 2021, Pleiades Publishing, Inc.Abstract: It is shown by the example of hydrogen (in hydrides ZrH), helium (in pores after implantation), and nickel (in G-phase precipitates) that the application of electron energy-loss spectroscopy within the scanning transmission electron microscopy method makes it possible to analyze the distribution of different chemical elements in the microstructure of reactor materials. The advantages of electron energy-loss spectroscopy (in comparison with energy-dispersive spectroscopy) for studying irradiated materials and important experimental conditions of the formation of energy loss spectra are discussed.
Только метаданные
Application of Transmission Electron Microscopy for the Study of a Functional Nanoelement
(2024) Prikhodko, K. E.; Dement’eva, M. M.; Приходько, Кирилл Евгеньевич
Открытый доступ
ВЛИЯНИЕ ОСОБЕННОСТЕЙ НАНОСТРУКТУРЫ НА МАГНИТНЫЕ СВОЙСТВА АМОРФНЫХ СПЛАВОВ НА ОСНОВЕ КОБАЛЬТА
(НИЯУ МИФИ, 2023) Козлов, И. В.; Елманов, Г. Н.; Приходько, К. Е.; Гудошников, С. А.; Приходько, Кирилл Евгеньевич; Козлов, Илья Владимирович; Елманов, Геннадий Николаевич
Магнитные свойства аморфных сплавов в значительной степени зависят от состава и технологических параметров их изготовления. При необходимости магнитные характеристики могут быть изменены за счет влияния на процесс эволюции аморфной фазы. Тонкая структура и магнитные свойства аморфных кобальтовых сплавов претерпевают значительные изменения при их нагреве до температур заметно ниже температуры кристаллизации, происходит упорядочение атомных областей. Аморфные сплавы со значительной степенью упорядоченных термически индуцированных атомных областей (кластеров) в объеме материала зачастую проявляют повышение магнитных свойств. В настоящей работе было изучено влияние таких термически индуцированных атомных областей (кластеров и нанокристаллов) в аморфной матрице на характер петель гистерезиса, поле анизотропии (Ha) и коэрцитивную силу (HC) микропроводов в стеклянной оболочке состава Co69Fe4Cr4Si12B11, полученных методом Улитовского-Тейлора.