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Phase transitions in (NH4)2MoO2F4: effect of hydrostatic and chemical pressure [Text] / Bogdanov E., Fokina V., Flerov I., Gorev M., Vasiliev A., Pogoreltsev E., Laptash N. // 9th Russai/CIS/Baltic/Japan symposium on ferroelectricity : abstracts book : June 15-19, 2008, Vilnius, Lithuania. - p. 139

Доп.точки доступа:
Bogdanov, E. V.; Богданов, Евгений Витальевич; Fokina, V. D.; Фокина, Валентина Дмитриевна; Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Laptash, N. M.; Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(9 ; 2008 ; May ; Vilnus, Lithuania)
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Zinenko, V. I.
Lattice dynamics of BiFeO3 under hydrostatic pressure / V. I. Zinenko, M. S. Pavlovsky // 9th Russai/CIS/Baltic/Japan symposium on ferroelectricity : abstracts book : June 15-19, 2008, Vilnius, Lithuania. - p. 137

Доп.точки доступа:
Pavlovsky, M. S.; Павловский, Максим, Сергеевич; Зиненко, Виктор Иванович; Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(9 ; 2008 ; May ; Vilnus, Lithuania)
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Pressure-indused phase transition in cubic ScF3 crystal / Aleksandrov K.S., Voronov V.N., Vtyurin A.N., Krylov A.S., Molokeev M.S., Pavlovskiy M.S., Goryainov S.V., Lihacheva A.N., Ancharov A.I. // 9th Russai/CIS/Baltic/Japan symposium on ferroelectricity : abstracts book : June 15-19, 2008, Vilnius, Lithuania. - p. 116

Доп.точки доступа:
Александров, Кирилл Сергеевич; Aleksandrov, K. S.; Voronov, V. N.; Воронов, Владимир, Николаевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Pavlovskiy, M. S.; Павловский, Максим Сергеевич; Goryainov, S. V.; Lihacheva, A. N.; Ancharov, A. I.; Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(9 ; 2008 ; May ; Vilnus, Lithuania)
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Александров, Кирилл Сергеевич.
Исследование фазовых переходов в триглицинселенате методом ЯКР / К. С. Александров, И. П. Александрова, В. С. Репета // Международная конференция по высоким давлениям и технологии

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Александрова, Инга Петровна; Aleksandrova, I. P.; Репета, В. С.; Aleksandrov, K. S.; International Conference on High Pressure Physics and Technology
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Spin crossover and resulting insultor?metal transitions in Mott insulators under high pressure / S. G. Ovchinnikov, I. S. Lyubutin [et al.] // XXXV Совещание по физике низких температур (НТ-35) : тезисы докладов : Черноголовка, 29 сентября - 2 октября 2009 г. / Сов. по физ. низких температур. - P85 . - ISBN 978-5-94691-384-3

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lyubutin, I. S.; Gavriliuk, A. G. ; Struzhkin, V. V.; Совещание по физике низких температур(35 ; 2009 ; сент.-окт. ; Черноголовка)
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Synthesis of Ni nanoclusters supported on diamond by plasma technique and their electrochemical properties / N. S. Nikolaev, V. G. Isakova, N. G. Vnukova [et al.] // Diam. Relat. Mater. - 2024. - Vol. 142. - Ст. 110844, DOI 10.1016/j.diamond.2024.110844. - Cited References: 35 . - ISSN 0925-9635. - ISSN 1879-0062
Кл.слова (ненормированные):
High pressure – high temperature (HTHP) diamond -- Nickel plasma -- Cyclic voltammetric -- Electrocatalytic activity -- Methanol -- Paracetamol
Аннотация: In this study, particles of synthetic undoped diamond (DN) obtained via the high pressure – high temperature method were coated with a nickel shell using metallic nickel plasma in a two-jet plasma generator with gas vortex and magnetic flux stabilization. Through the use of scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, we observed the formation of a nickel diamond composite with a core-shell structure, where DN serves as the core and Ni nanoclusters form the shell (DN@Ni). The results of voltammetric analysis indicated that DN@Ni, when deposited on a graphite electrode, exhibited significant electrocatalytic activity in the oxidation of methanol and paracetamol in an alkaline electrolyte.

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Держатели документа:
Kirensky Institute of Physics, FSBSI "Federal Research Center "Krasnoyarsk Science Center SB RAS", Akademgorodok 50/38, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Academician Kirensky str., 28, Krasnoyarsk 660074, Russia
Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences, FSBSI "Federal Research Center "Krasnoyarsk Science Center SB RAS", Akademgorodok 50/24, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Nikolaev, N. S.; Николаев, Никита Сергеевич; Isakova, V. G.; Исакова, Виктория Гавриловна; Vnukova, N. G.; Внукова, Наталья Григорьевна; Elesina, V. I.; Елесина, Виктория Игоревна; Glushenko, G. A.; Глущенко, Гарий Анатольевич; Tomashevich, Y. V.; Томашевич, Евгений Владимирович; Churilov, G. N.; Чурилов, Григорий Николаевич
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Realizing persistent zero area compressibility over a wide pressure range in Cu2GeO4 by microscopic orthogonal-braiding strategy / X. Zhang, Yo. Liu, M. S. Molokeev [et al.] // Angew. Chem. - 2024. - Vol. 136, Is. 7. - Ст. e202318401, DOI 10.1002/ange.202318401. - Cited References: 24. - The authors would like to acknowledge Zhuohong Yin for useful discussions and experimental time for the 4W2 beamline in the Beijing synchrotron radiation facility (BSRF). This work was supported by the National Scientific Foundations of China (Grants T2222017, 12274425, 22133004, 11974360 and 51890864) and the CAS Project for Young Scientists in Basic Research (YSBR-024). M.S. Molokeev would like to acknowledge support fromthe Ministry of Science and High Education of the Russian Federation (Project No. FSRZ-2023-0006) . - ISSN 0044-8249. - ISSN 1521-3757
Кл.слова (ненормированные):
Zero area compressibility -- Orthogonal-Braiding -- High pressure -- Copper-based oxides -- First-principles calculation
Аннотация: Zero area compressibility (ZAC) is an extremely rare mechanical response that exhibits an invariant two-dimensional size under hydrostatic pressure. All known ZAC materials are constructed from units in two dimensions as a whole. Here, we propose another strategy to obtain the ZAC by microscopically orthogonal-braiding one-dimensional zero compressibility strips. Accordingly, ZAC is identified in a copper-based compound with a planar [CuO4] unit, Cu2GeO4, that possesses an area compressibility as low as 1.58(26) TPa-1 over a wide pressure range from ≈0 GPa to 21.22 GPa. Based on our structural analysis, the subtle counterbalance between the shrinkage of [CuO4] and the expansion effect from the increase in the [CuO4]-[CuO4] dihedral angle attributes to the ZAC response. High-pressure Raman spectroscopy, in combination with first-principles calculations, shows that the electron transfer from in-plane bonding dx2-y2 to out-of-plane nonbonding dz2 orbitals within copper atoms causes the counterintuitive extension of the [CuO4]-[CuO4] dihedral angle under pressure. Our study provides an understanding on the pressure-induced structural evolution of copper-based oxides at an electronic level and facilitates a new avenue for the exploration of high-dimensional anomalous mechanical materials.

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Держатели документа:
Functional Crystals Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
University of the Chinese Academy of Sciences, Beijing 100049, China
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Zhang, Xingyu; Liu, Youquan; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xu, Bohui; Jiang, Xingxing; Lin, Zheshuai
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Chemical pressure as an effective tool for tuning the structural disordering and barocaloric efficiency of complex fluorides (NH4)3MF7 (M: Sn, Ti, Ge, Si) / I. N. Flerov, M. V. Gorev, E. V. Bogdanov, N. M. Laptash // J. Phys. D: Appl. Phys. - 2024. - Vol. 57, Is. 17. - Ст. 175301, DOI 10.1088/1361-6463/ad211b. - Cited References: 39. - The study was supported by a Grant from the Russian Science Foundation No. 23-22-00115, https://rscf.ru/project/23-22-00115/ . - ISSN 0022-3727. - ISSN 1361-6463
Кл.слова (ненормированные):
fluorides -- phase transformation -- phase diagram -- entropy -- pressure -- barocaloric effect
Аннотация: Double fluoride salts (NH4)3M4+F7 (M4+: Sn, Ti, Ge, Si) demonstrate a high efficiency of using chemical pressure as a tool for control and tuning structural ordering/disordering, sensitivity to hydrostatic pressure, successions of the phase transitions, etc and, as a result, for purposeful variation within a wide range of parameters of barocaloric effect (BCE). The conventional and inverse BCEs near the triple points were found on the T − p phase diagrams, combination of which can be used to construct original cooling cycle in narrow temperature and pressure ranges. Reconstructive transformation between two cubic phases, Pm3-m ↔ Pa3-, realized in (NH4)3SnF7 at atmospheric pressure and in (NH4)3TiF7 at p ˃ 0.4 GPa are characterized by rather low thermal hysteresis, δT0 = 1 K, and a great entropy change, ΔSBCE = 110–152 J (kg · K)−1, depending on the size of the central atom. At above 300–350 K, a contribution to BCE associated with the regular thermal expansion of the crystal lattice becomes comparable to entropy and temperature changes under pressure in the region of the phase transitions. An analysis of the absolute, relative and integral barocaloric characteristics of (NH4)3M4+F7 compounds showed their high competitiveness with respect to other barocaloric materials considered as promising solid-state refrigerants.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660074 Krasnoyarsk, Russia
Institute of Engineering Systems and Energy, Krasnoyarsk State Agrarian University, 660049 Krasnoyarsk, Russia
Institute of Chemistry, Far Eastern Department of RAS, 690022 Vladivostok, Russia

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Laptash, N. M.
}
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Zhandun, V. S.
Magnetic structure and pressure-induced spin-crossover in Me3B2O6 (Me = Mn, Fe, Co, Ni) kotoites: Representation analysis and DFT calculations / V. S. Zhandun, O. N. Draganyuk, N. G. Zamkova // Comput. Mater. Sci. - 2024. - Vol. 236. - Ст. 112859, DOI 10.1016/j.commatsci.2024.112859. - Cited References: 25. - The study was funded by a grant from the Russian Science Foundation # 22-22-20024 https://rscf.ru/project/22-22-20024/, Krasnoyarsk Regional Fund of Science. The calculations were performed with the computer resources of “Complex modeling and data processing research installations of mega-class” SRC “Kurchatovsky Institute” (http://ckp.urcki.ru). VZ thanks Dr. Natalia Kazak and Oksana Draganyuk for help in preparing the manuscript, useful discussions and valuable advices . - ISSN 0927-0256. - ISSN 1879-0801
Аннотация: The magnetic and electronic properties of transition metal borates Me3B2O6 (Me = Mn, Fe, Co, Ni) with kotoite structure have been investigated at ambient and high pressures via a combination of representation analysis and density functional theory (DFT + U) calculations. Several magnetic configurations corresponding to the different irreducible representations have been considered. The total-energy calculations reveal that the magnetic ground state of Me3B2O6 kotoites is composition-dependent. The lowest energy magnetic phase of manganese and nickel kotoites is characterized by the antiferromagnetic ordering of the transition metal magnetic moments along the c- axis and along the b-axis for cobalt and iron kotoites. The magnetic cell of Ni3B2O6 kotoite corresponds to k = (1/2, 0, 1/2) vector and four time larger than the unit cell. The calculated exchange constants indicate the competition between ferromagnetic and antiferromagnetic interactions. At a critical pressure, Me ions undergo a high-spin to low-spin state crossover. This magnetic moments collapse is analyzed in terms of change in electronic structure under pressure.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University, 660022 Krasnoyarsk, Russia

Доп.точки доступа:
Draganyuk, O. N.; Драганюк, Оксана Николаевна; Zamkova, N. G.; Замкова, Наталья Геннадьевна; Жандун, Вячеслав Сергеевич
}
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10.

    Resistive switching properties of a nanostructured layer of mixed ZrO2 phases obtained in low-pressure arc discharge plasma / I. V. Karpov, L. Yu Fedorov, A. K. Abkaryan [et al.] // Vacuum. - 2024. - Vol. 227. - Ст. 113375, DOI 10.1016/j.vacuum.2024.113375. - Cited References: 34. - The work was performed with a support of the grant of the Russian Science Foundation (Project No. 24-29-00374, https://rscf.ru/project/24-29-00374/) . - ISSN 0042-207X. - ISSN 1879-2715
   Перевод заглавия: Резистивные коммутационные свойства наноструктурированного слоя смешанных фаз ZrO2, полученного в плазме дугового разряда низкого давления
Кл.слова (ненормированные):
Zirconium oxide -- Vacuum arc -- Physical vapor deposition -- Phase stability
Аннотация: The controlled vacuum-arc synthesis of zirconium dioxide (ZrO2) nanoparticles is considered, which makes it possible to regulate the percentage ratio of the monoclinic and tetragonal phases. The samples were characterized using XRD analysis, SEM, HRTEM analysis, FT-IR analysis, TG/DTA analysis and EPR spectroscopy. It has been established that the formation of the tetragonal phase is associated with the formation of a large number of oxygen vacancies formed due to high-speed quenching of nanoparticles. Reducing the operating gas pressure in a vacuum chamber from 180 Pa to 30 Pa makes it possible to obtain nanoparticles up to 2 nm in size. The synthesized ZrO2 nanoparticles do not contain foreign impurities and when heated, the weight loss is up to 7 %. The process of local resistive switching in the contact of an atomic force microscope (AFM) probe to a nanostructured ZrO(2-x) layer on a conducting substrate has been studied. Cyclic current-voltage characteristics demonstrate the existence of stable states of high and low resistance, switched by changing the polarity of the applied voltage. The coexistence of the m- and t-ZrO2 phases (and the resulting oxygen nonstoichiometry in the interboundary regions) provides conditions for the formation/destruction of a filament from oxygen vacancies, which determine the conductivity of the dielectric in the LRS state.

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

Доп.точки доступа:
Karpov, I.V.; Fedorov, L. Yu; Abkaryan, A.K.; Zharkov, S. M.; Жарков, Сергей Михайлович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Nemtsev, I. V.; Немцев, Иван Васильевич; Irtyugo, L.A.
}
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