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Исследование теплового расширения и теплоемкости керамики CaCu[[d]]3[[/d]]Ti4O[[d]]12[[/d]] / М. В. Горев [и др.] // Физ. тверд. тела. - 2012. - Т. 54, Вып. 9. - С. 1675-1679 . - ISSN 0367-3294
Аннотация: Выполнены измерения теплового расширения керамики CaCu3Ti4O12 в широком интервале температур 120-1200 K. Качество исследованных образцов подтверждается хорошим согласием результатов измерений теплоемкости в интервале 2-300 K и в окрестности фазового перехода магнитной природы при 25 K с данными для монокристалла. Аномалий в тепловом расширении, которые могли бы быть связаны с предполагавшимся другими исследователями фазовым переходом при 726-732 K, обнаружено не было. Исследовано влияние на тепловое расширение термической обработки образца в атмосфере гелия и на воздухе. Работа выполнена при поддержке гранта президента РФ по поддержке ведущих научных школ РФ (НШ-4828.2012.2).

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Переводная версия Investigation of the thermal expansion and heat capacity of the CaCu[[d]]3[[/d]]Ti[[d]]4[[/d]]O[[d]]12[[/d]] ceramics. - [Б. м. : б. и.]

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

Доп.точки доступа:
Горев, Михаил Васильевич; Gorev M.V.; Флёров, Игорь Николаевич; Flerov, I. N.; Карташев, Андрей Васильевич; Kartashev A.V.; Guillemet-Fritsch, S.
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Investigation of the thermal expansion and heat capacity of the CaCu[[d]]3[[/d]]Ti[[d]]4[[/d]]O[[d]]12[[/d]] ceramics / M. V. Gorev [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 9. - P. 1785-1789, DOI 10.1134/S1063783412090120. - Cited References: 22. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-4828.2012.2). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
GIANT DIELECTRIC-CONSTANT
HIGH-TEMPERATURES
Аннотация: The thermal expansion of the CaCu3Ti4O12 ceramics has been measured over a wide temperature range 120–1200 K. The high quality of the samples under study has been confirmed by good agreement of the results of measurements of the heat capacity in the range 2–300 K and in the vicinity of the phase transition of magnetic nature at 25 K with the data for the single crystal. No anomalies in the thermal expansion that can be associated with the phase transition at 726–732 K assumed by other investigators have been found. The influence exerted on the thermal expansion by the heat treatment of the sample in a helium atmosphere and in air has been investigated.

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Публикация на русском языке Исследование теплового расширения и теплоемкости керамики CaCu[[d]]3[[/d]]Ti4O[[d]]12[[/d]] // Физика твердого тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54, Вып. 9. - С. 1675-1679. - ISSN 0367-3294

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Guillemet-Fritsch, S.
}
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Makarov, I. A.
Dependence of the critical temperature of high-temperature cuprate superconductors on hoppings and spin correlations between CuO2 planes / I. A. Makarov, S. G. Ovchinnikov, E. I. Shneider // J. Exp. Theor. Phys. - 2012. - Vol. 114, Is. 2. - P. 329-342, DOI 10.1134/S1063776112020264. - Cited References: 73. - This study was supported in part by the Presidium of the Russian Academy of Sciences (program "Quantum Physics of Condensed Media," project no. 18.7), jointly by the Siberian and Ural branches of the Russian Academy of Sciences (integration projects project no. 40), the Russian Foundation for Basic Research (project no. 09-02-00127), the Presidential Program in Support of Young Scientists in Russia (project no. MK-1683.2010.2), and the federal target program "Specialists" (project no. P891). One of the authors (E.I.Sh.) gratefully acknowledges support from the nonprofit Dynasty foundation. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   BAND HUBBARD-MODEL
   SINGLE-CRYSTALS
   TRANSITION-TEMPERATURE
   FERMI-SURFACE
   DOPING DEPENDENCE
   THERMAL-EXPANSION
   COPPER OXIDES
   ANISOTROPY
   LA2-XSRXCUO4
Аннотация: The influence of interlayer hoppings on the superconducting transition temperature (T c) in bilayer cuprates has been studied. The parameter of hopping between layers is expressed as t ⊥(k) = t ⊥(cos(k x ) − cos(k y ))2 and treated as a small perturbation for the states of two CuO2 planes described by the t-t′-t″-J* model. In the generalized mean field approximation for dx2−y2{d_{{x. } - {y. }}} symmetry of the superconducting gap, neither the interlayer hopping or exchange interaction, nor the pair hopping between CuO2 layers provides an additional mechanism of Cooper pair formation or an increase in T c. In the concentration dependence of T c, the bilayer splitting of the upper Hubbard band of quasi-holes is manifested as two peaks with temperatures slightly lower than the maximum T c for a single-layer cuprate. Interlayer antiferromagnetic spin correlations suppress bilayer splitting.

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Публикация на русском языке Макаров, Илья Анатольевич. Зависимость критической температуры высокотемпературных сверхпроводников от перескоков и спиновых корреляций между CuO2-плоскостями [Текст] / И. А. Макаров, С. Г. Овчинников, Е. И. Шнейдер // Журн. эксперим. и теор. физ. : Наука, 2012. - Т. 141 Вып. 2. - С. 372-386

Держатели документа:
[Makarov, I. A.
Ovchinnikov, S. G.
Shneider, E. I.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Makarov, I. A.
Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Shneider, E. I.] Reshetnikov Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Shneider, E. I.; Шнейдер, Елена Игоревна; Макаров, Илья Анатольевич
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Heat conductivity and thermal expansion of crystal strontium tetraborate SrB4O7 / P. A. Popov [et al.] // Dokl. Phys. - 2012. - Vol. 57, Is. 2. - P. 54-56, DOI 10.1134/S1028335812020036. - Cited References: 13. - This work was in part supported by a grant of the President of the Russian Federation (NSh-4645.2010.2), by the ABTsP "Development of the Scientific Potential of Higher Schools" (grant no. 2.1.1/10747), and by the Programs of OFN of the Russian Academy of Sciences "Physics of New Materials and Structures" (grant no. 2.5.2). . - ISSN 1028-3358

РУБ Mechanics + Physics, Multidisciplinary

Аннотация: An experimental investigation of the heat conductivity and thermal expansion of an strontium tetraborate (SBO) crystal in wide temperature intervals was demonstrated. The single crystals used for manufacturing samples were grown by the Czochralski method from a melt with a stoichiometric ratio of components. The blend was synthesized from strontium carbonate and boric acid. The components were mechanically mixed in a carbon-glass bowl with the addition of a small amount of distilled water. The mixture was heated on a sandy bath to 60-90°C and shuffled with periodic addition of small portions of water until the carbonic-gas bubbles ceased to release. The growth of crystals was carried out on a seed oriented in the crystallographic direction b, and the extraction rate amounted to 2.4 mm/day over 6 days. the results obtained indicate the promising use of the SBO crystal matrix as a multifunctional optical material.

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Публикация на русском языке Теплопроводность и тепловое расширение кристалла тетрабората стронция SrB4O7 [Текст] / П. А. Попов [и др.] // Доклады Академии наук. - 2012. - Т. 442 № 4. - С. 462-464

Держатели документа:
[Popov, P. A.
Solomennik, V. D.] Bryansk State Univ, Bryansk 241036, Russia
[Zaitsev, A. I.
Zamkov, A. V.
Gorev, M. V.] Russian Acad Sci, Siberian Branch, Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Popov, P. A.; Solomennik, V. D.; Zaitsev, A. I.; Зайцев, Александр Иванович; Zamkov, A. V.; Замков, Анатолий Васильевич; Gorev, M. V.; Горев, Михаил Васильевич
}
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Studies of the heat capacity and thermal expansion of the Na0.95K0.05NbO3 solid solution / M. V. Gorev [et al.] // Phys. Solid State. - 2014. - Vol. 56, Is. 2. - P. 367-372, DOI 10.1134/S1063783414020115. - Cited References: 27. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-4828.2012.2) and the Russian Foundation for Basic Research (project no. 12-02-31799 mol_a). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
SODIUM NIOBATE
   PHASE-TRANSITIONS
   TEMPERATURE-RANGE
   SINGLE-CRYSTALS
   KNBO3
   FERROELECTRICS
   DIFFRACTION
   OCTAHEDRA
Аннотация: The heat capacity and thermal expansion of ceramic samples of the Na0.95K0.05NbO3 solid solution have been investigated over a wide temperature range of 100-750 K. The observed anomalies in the heat capacity and thermal expansion at T (4) = 297 K, T (3) = 535 K, T (2) = 665 K, and T (1) a parts per thousand 710 K correspond to the sequences of phase transitions N - Q - G - S - T1. It has been shown that, as a result of the phase transitions, the unit cell volume at T (4) and T (2) decreases, and at T (3) and T (1), increases with increasing temperature. The directions of the shift of the phase transition temperatures induced by hydrostatic pressure have been determined. It has been established that all structural transformations are accompanied by relatively small variations in the entropy. Different mechanisms of the structural distortions have been discussed.

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Публикация на русском языке Исследования теплоемкости и теплового расширения твердого раствора Na0.95K0.05NbO3 [Текст] / М. В. Горев [и др.] // Физ. тверд. тела. - 2014. - Т. 56 Вып. 2. - С. 362-367

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia
Southern Fed Univ, Inst Phys Res, Rostov Na Donu 344090, Russia

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Raevskaya, S. I.; Ivliev, M. P.; Raevskii, I. P.; Flerov, I. N.; Флёров, Игорь Николаевич; Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation [NSh-4828.2012.2]; Russian Foundation for Basic Research [12-02-31799 mol_a]
}
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Magnetic, magnetoelastic, and spectroscopic properties of TmAl3(BO3)4 / A. A. Demidov [et al.] // J. Exp. Theor. Phys. - 2014. - Vol. 119, Is. 4. - P. 737-744, DOI 10.1134/S106377611410015X. - Cited References: 28. - This study was supported financially by the Russian Foundation for Basic Research (project no. 13-02-12442ofi_m2) and (K.N.B.) by the grant no. MK-1700.2013.2 from the President of the Russian Federation. . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
THERMAL-EXPANSION
   CRYSTALS
   MAGNETOSTRICTION
   HoAl3(BO3)4
   GARNETS
Аннотация: The thermodynamic properties of alumoborate TmAl3(BO3)4 single crystal are studied experimentally and theoretically. A theoretical analysis based on the crystal field model makes it possible to interpret all measured parameters. The crystal field parameters are determined. The temperature (3–300 K) and field (up to 9 T) dependences of magnetization are described. The field and temperature dependences of multipole moments of the Tm3+ ion in TmAl3(BO3)4 make it possible to describe magnetostriction and low-temperature anomalies in thermal expansion.

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Публикация на русском языке Магнитные, магнитоупругие и спектроскопические свойства TmAl3(BO3)4 [Текст] / А. А. Демидов [и др.] // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 4. - С. 835-843

Держатели документа:
Bryansk State Tech Univ, Bryansk 241035, Russia
Moscow MV Lomonosov State Univ, Moscow 119992, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Spect, Moscow 142190, Russia

Доп.точки доступа:
Demidov, A. A.; Volkov, D. V.; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Boldyrev, K. N.; Russian Foundation for Basic Research [13-02-12442ofi_m2]; Russian Federation [MK-1700.2013.2]
}
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    Studies of Heat Capacity and Thermal Expansion of Na1-xKxNbO3 and Na1-xLixNbO3 Solid Solution Ceramics / M. V. Gorev [и др.] // Int. Workshop on Phase Transit. and Inhomogeneous States in Oxides : book of abstracts. - Kazan, 2015. - P. 23
   Перевод заглавия: Исследования теплоемкости и теплового расширения твердых растворов Na1-xKxNbO3 и Na1-xLixNbO3

Материалы конференции

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Raevskaya, S. I.; Раевская С. И.; Titov, V. V.; Титов В. В.; Raevskii, I. P.; Раевский И.П.; Flerov, I. N.; Флёров, Игорь Николаевич; International Workshop on Phase Transitions and Inhomogeneous States in Oxides(2015 ; june ; 22-25 ; Kazan); "Фазовые переходы и неоднородные состояния в оксидах", международный семинар(2015 ; июнь ; 22-25 ; Казань)
}
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    Fedorov, A. S.
    Expansion of endohedral fullerene formation statistical model / A. S. Fedorov, M. A. Visotin // Third Asian school-conference on physics and technology of nanostructured materials (ASCO-NANOMAT 2015) : proceedings. - Vladivostok : Dalnauka, 2015. - Ст. V.22.09o. - P. . - ISBN 978-5-8044-1556-4
   Перевод заглавия: Особенности спектра стоячих спиновых волн в гранулированных и градиентных мультислойных пленках на основе кобальта

Материалы конференции

Доп.точки доступа:
Visotin, M. A.; Высотин, Максим Александрович; Федоров, Александр Семенович; Asian School-Conference on Physics and Technology of Nanostructured Materials(3 ; 2015 ; Aug. ; 19-26 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(3 ; 2015 ; авг. ; 19-26 ; Владивосток)
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    Large isotropic negative thermal expansion above a structural quantum phase transition / S. U. Handunkanda [et al.] // Phys. Rev. B. - 2015. - Vol. 92, Is. 13. - Ст. 134101, DOI 10.1103/PhysRevB.92.134101. - Cited References:35. - The authors also acknowledge the valuable conversations with Joe Budnick and Gabe Aeppli. Work at the University of Connecticut is supported by National Science Foundation Award No. DMR-1506825. Work at the University of Costa Rica is supported by Vicerrectoria de Investigacion under Project No. 816-B5-220, and work at Argonne National Laboratory is supported by the US Department of Energy, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357. R.T.B. acknowledges support from the Yale Prize Postdoctoral Fellowship. The construction of HERIX was partially supported by the NSF under Grant No. DMR-0115852. . - ISSN 1098. - ISSN 1550-235X
Рубрики:
SCF3 CRYSTAL
   CUBIC SCF3
   DYNAMICS
   SCATTERING
   SRTIO3
Аннотация: Perovskite structured materials contain myriad tunable ordered phases of electronic and magnetic origin with proven technological importance and strong promise for a variety of energy solutions. An always-contributing influence beneath these cooperative and competing interactions is the lattice, whose physics may be obscured in complex perovskites by the many coupled degrees of freedom, which makes these systems interesting. Here, we report signatures of an approach to a quantum phase transition very near the ground state of the nonmagnetic, ionic insulating, simple cubic perovskite material ScF3, and show that its physical properties are strongly effected as much as 100 K above the putative transition. Spatial and temporal correlations in the high-symmetry cubic phase determined using energy- and momentum-resolved inelastic x-ray scattering as well as x-ray diffraction reveal that soft mode, central peak, and thermal expansion phenomena are all strongly influenced by the transition.

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Держатели документа:
Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA.
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
Univ Costa Rica, Ctr Invest Ciencia & Ingn Mat, San Jose 2060, Costa Rica.
Univ Costa Rica, Escuela Fis, San Jose 2060, Costa Rica.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60349 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
Univ Chicago, James Franck Inst, Chicago, IL 60637 USA.
Argonne Natl Lab, Argonne, IL 60349 USA.

Доп.точки доступа:
Handunkanda, S. U.; Curry, E. B.; Voronov, V. N.; Воронов, Владимир Николаевич; Said, Ayman H.; Guzman-Verri, G. G.; Brierley, R. T.; Littlewood, P. B.; Hancock, J. N.
}
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10.

    EPR study of Gd3+ local structure in ScF3 crystal with negative thermal expansion coefficient / A. Antuzevics [et al.] // Phys. Scr. - 2015. - Vol. 90, Is. 11. - Ст. 115801, DOI 10.1088/0031-8949/90/11/115801. - Cited References: 32. - We are grateful to Professor S Ovchinnikov for providing ScFINF3/INF samples. This work was supported by L-KC-11-0005 project Nr.KC/2.1.2.1.1/10/01/006,5.3 . - ISSN 0031-8949
   Перевод заглавия: ЭПР исследование локальной структуры гадолиния в кристалле трехфтористого скандия с отрицательным коэффициентом теплового расширения

РУБ Physics, Multidisciplinary
Рубрики:
ELECTRON-PARAMAGNETIC-RESONANCE
   SPIN-HAMILTONIAN PARAMETERS
   SINGLE-CRYSTALS
   SUPERPOSITION-MODEL
   CENTERS
   SPECTRA
   PHASE
   TEMPERATURE
   SIMULATION
Кл.слова (ненормированные):
electron paramagnetic resonance -- Gd3+ -- ScF3 -- negative thermal expansion
Аннотация: Zero field splitting (ZFS) of Gd3+ impurity in ScF3 is studied by electron paramagnetic resonance at 77 and 295 K. ZFS parameter b4 values obtained from angular dependence simulations show that regardless of negative thermal expansion in ScF3 temperature dependence of |b4| is similar to other cubic fluoroperovskites. Our analysis of ZFS parameters indicates that the local structure of Gd3+ centres expands positively with temperature. © 2015 The Royal Swedish Academy of Sciences.

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Держатели документа:
Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga, Latvia
L. V. Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Antuzevics, A.; Rogulis, U.; Fedotovs, A.; Berzins, D.; Voronov, V. N.; Воронов, Владимир Николаевич; Purans, J.
}
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