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    Ferroelastic and ferroelectric phase transitions in fluoro- and oxyfluorometallates / I. N. Flerov [и др.] // Photonic and electronic properties of fluoride materials : Elsevier, 2016. - Chapter 16. - P. 355-381. - (Progress in fluorine science series), DOI 10.1016/B978-0-12-801639-8.00016-7. - Cited References: 92. - The reported study was partially supported by RFBR, research project No. 15-02-02009 a
   Перевод заглавия: Сегнетоэластические и сегнетоэлектрические фазовые переходы во фтор- и оксифторидметаллатах

РУБ Chemistry, Organic + Chemistry, Physical
Рубрики:
ELASTIC NEUTRON-DIFFRACTION
   ORIENTATIONAL DISORDER
   CRYSTAL-STRUCTURES
   THERMODYNAMIC PROPERTIES
   NONCRITICAL PARAMETERS
   CUBIC PEROVSKITES
   RAMAN-SCATTERING
   SINGLE-CRYSTALS
   A2BX4 STRUCTURE
   HIGH-RESOLUTION
Аннотация: Different degree of structural disorder is one of the main features of many fluoro- and oxyfluorometallates crystallizing in high symmetry structures. The comprehensive study of these compounds (perovskites, elpasolites, pyrochlores, etc.) enabled to determine a great effect of the size and shape as well as crystallographic sites of cationic and anionic species on the mechanism of structural ordering. Ferroelastic and ferroelectric phase transitions of different order, type, and succession can be realized as a result of chemical and hydrostatic pressure change. It was found that the substitution of monoatomic cations for tetrahedral ammonium group was accompanied by rather significant change of electron density distribution, entropy, and phase diagrams. Some compounds studied were considered to be promising solid-state refrigerants owing to the pronounced barocaloric effect resulting from large entropy and baric coefficient of phase transitions.

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Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Laptash, N. M.
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Conventional and inverse barocaloric effects in ferroelectric NH4HSO4 / M. V. Gorev [et al.] // J. Alloys Compd. - 2019. - Vol. 806. - P. 1047-1051, DOI 10.1016/j.jallcom.2019.07.273. - Cited References: 22 . - ISSN 0925-8388
Кл.слова (ненормированные):
Polymorphic phase transformation -- Phase diagram -- Order–disorder phenomena -- Entropy -- Barocaloric effect
Аннотация: In this study, the conventional and inverse barocaloric effects (BCE) in ferroelectric NH4HSO4 are reported. Maximum extensive and intensive BCE near order–disorder phase transition can be achieved at low pressure p≤0.1 GPa. Large thermal expansion of the crystal lattice plays a very important role in the developing conventional BCE and conversation between BCE of different sign in the narrow temperature range.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Engineering Systems and Energy, Krasnoyarsk State Agrarian University, Krasnoyarsk, 660049, Russian Federation

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Bogdanov, E. V.; Богданов, Евгений Витальевич
}
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Structural features associated with multiferroic behavior in the RX3(BO3)4 system / H. Zhang [et al.] // J. Phys. Condens. Matter. - 2019. - Vol. 31, Is. 50. - Ст. 505704, DOI 10.1088/1361-648X/ab415f. - Cited References: 38 . - ISSN 0953-8984
Кл.слова (ненормированные):
multiferroic -- magnetoelectric -- crystal structure -- ferroelectric -- spin-lattice coupling
Аннотация: The magnetoelectric effect in the RX3(BO3)4 system (R = Ho, Eu, Sm, Nd, Gd; X = Fe, Al) varies significantly with the cation R despite very similar structural arrangements. Our structural studies reveal a symmetry reducing tilting of the BO3 planes and of the FeO6 polyhedra in the systems exhibiting low magnetic field induced electric polarization. Neutron scattering measurements reveal a lack of magnetic ordering indicating the primary importance of the atomic structure in the multiferroic behavior of this system.

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Держатели документа:
Department of Physics, New Jersey Institute of Technology, Newark, NJ 071022, United States
National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, United States
L.V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Center for Advanced Radiation Sources, University of Chicago, Argonne, Chicago, IL 60439, United States
Laboratoire de Physique et d'Etude des Materiaux (LPEM), ESPCI Paris, PSL University, CNRS, Paris, 75005, France
Sorbonne Universite, CNRS, LPEM, Paris, 75005, France
Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States

Доп.точки доступа:
Zhang, H.; Liu, S.; Nelson, C. S.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Chen, Y. -S.; Wang, S. G.; Lobo, R. P.S.M.; Page, K.; Matsuda, M.; Pajerowski, D. M.; Williams, T. J.; Tyson, T. A.
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Anisotropy of piezocaloric effect at ferroelectric phase transitions in ammonium hydrogen sulphate / E. V. Bogdanov, I. N. Flerov // E-MRS fall meeting : conference programme. - 2019. - Ст. E.P.4. - This work was supported by the Russian Science Foundation (RSF) grant (No. 19-72-00023)

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660074 Krasnoyarsk, Russia
Far Eastern State Transport University, Khabarovsk, Russia 680021
Astafijev Krasnoyarsk State Pedagogical University, 660049 Krasnoyarsk, Russia

Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Fall Meeting, European Materials Research Society(2019 ; Sept. ; 16-19 ; Warsaw, Poland); European Materials Research Society; Warsaw University of Technology
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X-Ray, Dielectric, and Thermophysical Studies of Rubidium Tetrachlorozincate inside Porous Glasses / L. N. Korotkov [et al.] // Bull. Russ. Acad. Sci. Phys. - 2019. - Vol. 83, Is. 9. - P. 1072-1076, DOI 10.3103/S1062873819090132. - Cited References: 17 . - ISSN 1062-8738
Кл.слова (ненормированные):
Borosilicate glass -- Chlorine compounds -- Ferroelectric materials -- Glass ceramics -- Rubidium -- Thermal expansion -- Zinc compounds
Аннотация: Results are presented from studying the X-ray diffraction, heat capacities, dielectric permittivities, and coefficients of the volumetric thermal expansion of composite materials obtained by embedding of Rb2ZnCl4 salt into the porous matrices of borosilicate glass with average pore diameters of 46 and 320 nm in the temperature range of 120–350 K. The temperatures of transitions to the incommensurate and ferroelectric phases are determined, along with the freezing temperature of the mobility of domain boundaries in Rb2ZnCl4 particles. A substantial increase in their Curie temperature is observed.

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Держатели документа:
Voronezh State Technical University, Voronezh, 394000, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Military Training and Scientific Center, Zhukovsky and Gagarin Air Force Academy, Voronezh, 394064, Russian Federation

Доп.точки доступа:
Korotkov, L. N.; Stekleneva, L. S.; Flerov, I. N.; Флёров, Игорь Николаевич; Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Rysiakiewicz-Pasek, E.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bondarev, I. A.; Бондарев, Илья Александрович; Gorev, M. V.; Горев, Михаил Васильевич; Sysoev, O. I.
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Comparing the magnetic and magnetoelectric properties of the SmFe3(BO3)4 ferroborate single crystals grown using different solvents / E. Eremin [et al.] // J. Cryst. Growth. - 2019. - Vol. 518. - P. 1-4, DOI 10.1016/j.jcrysgro.2019.04.017. - Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (RFBR) according to the research projects No. 18-02-00696_a and RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund by project No. 18-42-240011 p_a. . - ISSN 0022-0248. - ISSN 1873-5002

РУБ Crystallography + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
POLARIZATION
FEATURES
Кл.слова (ненормированные):
Impurities -- Growth from solutions -- Single crystal growth -- Borates -- Ferroelectric materials -- Magnetic materials
Аннотация: SmFe3(BO3)4 single crystals have been grown from the bismuth trimolybdate and lithium tungstate-based melt–solutions. Samarium ferroborate single crystals were grown first from the lithium–tungstate flux. The magnetic and magnetoelectric properties of the synthesized crystals have been compared. It is shown that the SmFe3(BO3)4 ferroborate grown from the bismuth trimolybdate-based melt–solution contains impurities of Bi3+ ions (∼5% at.), which replace Sm3+ ions, while the SmFe3(BO3)4, ferroborate grown from the lithium tungstate-based melt–solution contains minor or zero amounts of such impurities. The magnetoelectric and magnetodielectric effects with the Bi3+ admixture appeared 1.5× stronger than in SmFe3(BO3)4; this is probably due to twinning.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Eremin, E. V.; Еремин, Евгений Владимирович; Gudim, I. A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; Smolyakov, D. A.; Смоляков, Дмитрий Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Russian Foundation for Basic Research (RFBR) [18-02-00696_a]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [18-42-240011 p_a]
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Aplesnin, S. S.
Electronic transition, ferroelectric and thermoelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 / S. S. Aplesnin, L. V. Udod, M. N. Sitnikov // Ceram. Int. - 2018. - Vol. 44, Is. 2. - P. 1614-1620, DOI 10.1016/j.ceramint.2017.10.082. - Cited References: 41. - The authors would like to thank M. Molokeev for the clarification of x-ray spectra. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 16–52-00045 bel_a. . - ISSN 0272-8842
Кл.слова (ненормированные):
Dielectric properties -- Ferroelectric properties -- Impedance -- Thermopower -- Electrical properties
Аннотация: The ferroelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 in the high-temperature region are established. The linear thermal expansion coefficient, electrical resistance, impedance, I−V characteristics, capacitance, loss-angle tangent, charge, and thermopower of the investigated material are measured in the temperature range of 300−700 K at frequencies of 102−106 Hz. Anomalies of the thermal expansion coefficient and hodograph spectrum variation in the region of polymorphic phase transitions are observed. The high resistance and change of the hopping conductivity for the tunnel-emission are found. The hysteresis in the electric field dependence of polarization is established. The change in the thermopower sign with temperature is revealed. The obtained experimental data are explained in the framework of the model of migration polarization by charged chromium ions.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University M. F. Reshetnev, Krasnoyarsky Rabochy Av. 31, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Аплеснин, Сергей Степанович
}
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    Quantum-chemical research of endohedral yttrium metallofullerenes / A. S. Kholtobina [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 4. - P. 422-428 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2017-10-4-422-428. - This work was supported by the Russian Foundation for Basic Research (no. 16-43-242148), Krasnoyarsk Regional Science Foundation (agreement 35/16 dated 18.11.2016) and by the pres- ident of Russia Scientific School program NSh 7559.2016.2. . - ISSN 1997-1397
   Перевод заглавия: Квантово-химическое исследование эндоэдральных иттриевых металлофуллеренов
Кл.слова (ненормированные):
Density functional theory -- Endohedral metallofullerenes -- Ferroelectric properties -- Y@C82
Аннотация: The structural and electronic properties of single molecule Y@C82, their join couple and crystal structure of Y@C82 were investigated by DFT-GGA approach. The calculations show that Y@C82 form stable crystal structures wich may have ferroelectric properties, so they can be applied in electronics as a ferroelectric memory.
Структурные и электронные свойства одиночного комплекса Y@C82, структуры, состоящей из двух комплексов Y@C82, а также данного комплекса в периодических условиях были исследованы в рамках DFT-GGA–подхода. Моделирование эндоэдральных металлофуллеренов Y@C82 показало возможность формирования из них стабильных кристаллических структур, которые обладают сегнетоэлектрическими свойствами, что может быть применено в электронике и сегнетоэлектрической памяти.

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Держатели документа:
Kirensky Institute of Physics, Akademgorodok, 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kholtobina, A. S.; Холтлбина, Анастасия С.; Tsyplenkova, D. I.; Цыпленкова, Дарья И.; Kuzubov, A. A.; Кузубов, Александр Александрович; Visotin, M. A.; Высотин Максим Александрович; Fedorov, A. S.; Федоров, Александр Семенович

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Andryushin, N. D.
Pressure induced ferroelectric phase transition in GdFe3(BO3)4 / N. D. Andryushin, M. S. Pavlovski, V. I. Zinenko // Joint 14th Rus./CIS/Baltic/Japan Symp. on Ferroelectricity (RCBJSF)/ Young sci. school on the spect. studies of critical dynamics at struct. phase trans. : Abstract book / org. comm. A. N. Vtyurin ; progr. comm. I. N. Flerov. - 2018. - P. 92. - Cited References: . - ISBN 978-5-9651-1144-2

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Доп.точки доступа:
Vtyurin, A. N. \org. comm.\; Втюрин, Александр Николаевич; Flerov, I. N. \progr. comm.\; Флёров, Игорь Николаевич; Pavlovski, M. S.; Павловский, Максим Сергеевич; Zinenko, V. I.; Зиненко, Виктор Иванович; Joint Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(14 ; May 14-18, 2018 ; St. Perersburg); Young scientists school on the spectroscopic(May 14-18, 2018 ; St. Perersburg); Физико-технический институт им. А.Ф. Иоффе РАН; Санкт-Петербургский политехнический университет им. Петра Великого
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10.

Effect of interaction of components on thermal properties of ferroelectric nanocomposites / E. A. Mikhaleva [et al.] // Eleventh Seminar Porous Glasses-Special Glasses (PGL'2018) : Abstracts and program. - 2018. - Ст. 18. - P. 23. - Библиогр.: 2

,
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Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Kogotkov, L. N.; Rysiakiewicz-Pasek, E.; "Porous Glasses-Special Glasses", Seminar(11 ; 2018 ; Sept. ; 12-16 ; Szklarska Poręba, Poland); Wroclaw University of Science and Technology
}
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