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1.
Особенности кристаллической структуры
и магнитные свойства соединения DyFeTi2O7 / Т. В. Дрокина [и др.]> // Физ. тверд. тела. - 2013. -
Т. 55
,
Вып. 10
. - С. 1922-1927
Аннотация:
Представлены результаты исследования особенностей кристаллической структуры и распределения катионов железа по позициям в соединении DyFeTi2O7, проведено сравнение с изоструктурным соединением GdGaTi2O7. Методами мессбауэровской спектроскопии и рентгеновской дифракции подтвержден атомный беспорядок в распределении ионов железа Fe3+ по структурным позициям в DyFeTi2O7. Результаты магнитных измерений в низкотемпературной области показывают излом на температурной зависимости магнитного момента и его зависимость от магнитной предыстории образца. Полученные экспериментальные данные позволяют сделать вывод о реализации состояния спинового стекла с температурой замерзания Tf=6 K в соединении DyFeTi2O7
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Переводная версия
Specific features of the crystal structure and magnetic properties of the DyFeTi2O7
compound
. - [Б. м. : б. и.]
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Дрокина, Тамара Васильевна; Drokina, T. V.; Петраковский, Герман Антонович; Petrakovskii, G.A.; Молокеев, Максим Сергеевич; Molokeev, M.S.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Плетнев, Олег Николаевич; Pletnev, O.N.; Баюков, Олег Артемьевич; Bayukov, O. A.
}
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2.
Specific features of
the crystal structure and magnetic properties of the DyFeTi2O7
compound
/ T. V. Drokina [et al.]> // Phys. Solid State. - 2013. -
Vol. 55
,
Is. 10
. - P. 2037-2042,
DOI
10.1134/S1063783413100107 . - ISSN 1063-7834
Аннотация:
Results of studying the specific features of formation of the crystal structure and distribution of iron cations over the sites in the DyFeTi2O7
compound
have been presented and the comparison with the GdGaTi2O7 isostructural
compound
has been performed. The atomic disorder in the distribution of the Fe3+ ions over structural sites in the DyFeTi2O7
compound
is confirmed by the Mossbauer spectroscopy and X-ray diffractometry. The results of magnetic measurements in the low-temperature region have revealed an inflection point in the temperature dependence of the magnetic moment and its dependence on the magnetic prehistory of the sample. The obtained experimental data suggest that there is a spin glass state with freezing point Tf = 6 K in the DyFeTi2O7
compound
. В© 2013 Pleiades Publishing, Ltd.
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Переводная версия
Особенности кристаллической структуры и магнитные свойства соединения DyFeTi2O7 // Физика твердого тела. - 2013. - Т. 55, Вып. 10. - С. 1922-1927
Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Pletnev, N. O.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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3.
Val'kov, V. V.
Coexistence of superconductivity and antiferromagnetism in heavy-fermion intermetallic
compound
CeRhIn5 / V. V. Val'Kov, A. O. Zlotnikov> // J. Supercond. Nov. Magn. - 2013. -
Vol. 26
,
Is. 9
. - P. 2885-2886,
DOI
10.1007/s10948-013-2222-4 . - ISSN 1557-1939
Кл.слова (ненормированные):
Coexistence superconductivity antiferromagnetism
--
Heavy-fermion systems
--
Periodic Anderson model
Аннотация:
An interference of heavy-fermion superconductivity (SC) and antiferromagnetism (AFM) has been studied in the framework of the periodic Anderson model with the superexchange interaction between localized electrons. It has been shown that pressure-induced energy change of the localized states leads to modifying antiferromagnetic and superconducting order parameters. Conditions have been found for the coexistence of SC and AFM in the model. Theoretical results of the pressure effects on the ground state character of the heavy-fermion systems are in good agreement with experimental data for a rare-earth intermetallic
compound
CeRhIn5. The divergence of the effective electron mass produced by suppressing the long-range antiferromagnetic order has also been analyzed in the same framework. В© 2013 Springer Science+Business Media New York.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk, Russia;
Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Вальков, Валерий Владимирович
}
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4.
Jc enhancement and
flux pinning of Se substituted YBCO
compound
/ Z. D. Yakinci [et al.]> // J. Mater. Sci.: Mater. Electron. - 2013. -
Vol. 24
. - P. 4790–4797,
DOI
10.1007/s10854-013-1476-8. - The work is supported by Project No. 7 of RAS Program ‘"Quantum physics of condensed matter" . - ISSN 0957-4522
Перевод заглавия:
Увеличение критического тока и пиннинг потока в соединении YBCO с замещением Se
Аннотация:
Y2/3 Se1/3Ba2Cu3Ox
compound
was fabricated by using solid state fabrication technique. Optimum heat treatments conditions for Y0.77Se0.33Ba2Cu3Ox were investigated. It was determined that the XRD results of these samples were similar to Y-123 phase with some impurities. Magnetization dependence of applied magnetic fields was measured in the range of 0-9В T at 10-50В K. The symmetric and asymmetric M-H loops were obtained for the samples. Magnetization loops obtained from measurements were successfully described by the extended Valkov-Khrustalev model. The temperature and applied magnetic field dependencies of magnetization of sample were estimated and critical current density of samples was calculated by Bean model and pinning force of samples was calculated by using Lorentz force. It is found from critical current density values that Se additions were acted as a pinning center which increased critical current density. В© 2013 Springer Science+Business Media New York.
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Держатели документа:
Inonu Univ, Sagl Hizmetleri Meslek Yuksek Okulu, TR-44280 Malatya, Turkey
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Inonu Univ, Bilimsel & Teknol Arastrma Merkezi, TR-44280 Malatya, Turkey
Inonu Univ, Fen Edebiyat Fak, Superiletkenl Arastirma Grubu, TR-44280 Malatya, Turkey
Доп.точки доступа:
Yakinci, Z. D.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Altin, E.; Kurt, F.; Altin, S.; Demirel, S.; Aksan, M. A.; Yakinci, M. E.
}
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5.
Magnetic state of
the GdFeTi2O7
compound
/ G. A. Petrakovskii [et al.]> // Phys. Solid State. - 2012. -
Vol. 54
,
Is. 9
. - P. 1813-1816,
DOI
10.1134/S1063783412090235. - Cited References: 11 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
SPIN-GLASS
GD
SM
Аннотация:
The X-ray diffraction, Mossbauer, calorimetric, and magnetic characteristics of zirconolite GdFeTi2O7 have been measured to determine the ground magnetic state. A kink dependent on the magnetic prehistory of the sample has been revealed in the temperature dependence of the magnetic moment at T = 3 K. Mossbauer spectroscopy has confirmed the nonequivalence of the iron ion positions in GdFeTi2O7. The experimental data obtained allow the conclusion on the formation of a spin glass state with the freezing temperature T (f) = 3 K in the GdFeTi2O7
compound
.
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Публикация на русском языке
Магнитное состояние соединения GdFeTi2O7 [Текст] / Г. А. Петраковский [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 9. - С. 1701-1704
Держатели документа:
[Petrakovskii, G. A.
Drokina, T. V.
Velikanov, D. A.
Bayukov, O. A.
Molokeev, M. S.
Kartashev, A. V.
Shadrina, A. L.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Petrakovskii, G. A.
Drokina, T. V.
Velikanov, D. A.
Bayukov, O. A.
Mitsuk, A. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Drokina, T. V.; Дрокина, Тамара Васильевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Shadrina, A. L.; Шадрина, Александра Леонидовна; Mitsuk, A. A.
}
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6.
Specific features of
magnetic ordering in the SmFeGe2O7
compound
/ T. V. Drokina [et al.]> // Phys. Solid State. - 2014. -
Vol. 56
,
Is. 6
. - P. 1131-1136,
DOI
10.1134/S1063783414060122. - Cited References: 10 . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
NEUTRON-DIFFRACTION
PR
FERGE2O7
R=LA
Аннотация:
The results of the experimental investigation of the magnetic properties of the SmFeGe2O7
compound
have been presented. It has been found that the temperature dependence of the susceptibility exhibits two features that coincide with the anomalies in the temperature dependence of the specific heat and indicate magnetic phase transitions in SmFeGe2O7. The external magnetic field induces a magnetic transition, the critical field of which depends on the temperature.
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Публикация на русском языке
Особенности магнитного упорядочения в соединении SmFeGe2O7 [Текст] / Т. В. Дрокина [и др.] // Физ. тверд. тела : ФТИ РАН, 2014. - Т. 56 Вып. 6. - С. 1088-1092
Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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7.
Oxatrane is a
parent
compound
of a new atrane family: Crystal and molecular structure of triethanolamine N-oxide / M. G. Voronkov [et al.]> // Dokl. Chem. - 2014. -
Vol. 458
. - P. 172-175,
DOI
10.1134/S0012500814090031. - This work was supported by the Council for Grants of the President of the Russian Federation for Support of Leading Scientific Schools (grant no. NSh-3649.2014.3). . - ISSN 0012-5008. - ISSN 1608-3113
РУБ
Chemistry, Multidisciplinary
Рубрики:
TERTIARY-AMINES
DIETHANOLAMINE
SILATRANES
OXIDATION
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Публикация на русском языке
Оксатран - родоначальник нового семейства атранов. Кристаллическая и молекулярная структура N-оксида триэтаноламина. [Текст] / М. Г. Воронков [и др.] // Докл. Акад. наук. - 2014. - Т. 458 № 3. - С. 287-290
Держатели документа:
Russian Acad Sci, Favorskii Inst Chem, Siberian Branch, Irkutsk 664033, Russia
East Siberian State Acad Educ, Irkutsk 664011, Russia
Russian Acad Sci, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Voronkov, M. G.; Zel'bst, E. A.; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Kuznetsova, G. A.; Council for Grants of the President of the Russian Federation for Support of Leading Scientific Schools [NSh-3649.2014.3]
}
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8.
Aver'yanov, E. M.
Structural and thermodynamic consequencies of the interaction of conformational degrees of freedom of azomethines in the nematic phase / E. M. Aver'yanov> // J. Struct. Chem. - 2014. -
Vol. 55
,
Is. 4
. - P. 605-611,
DOI
10.1134/S0022476614040039. - Cited References: 21 . - ISSN 0022-4766. - ISSN 1573-8779
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
CONJUGATED POLY(AZOMETHINE)S
TERMINAL SUBSTITUENTS
ELECTRONIC-STRUCTURES
FLUORINATED ANALOGS
INTERNAL-ROTATION
MOLECULES
COMPOUND
ANGLES
STATE
NMR
Кл.слова (ненормированные):
azomethines
--
benzylideneaniline
--
conformation
--
steric effects of substituents
--
nematic-isotropic liquid transition
--
conformational polymorphism
Аннотация:
The interaction of the conformational degrees of freedom of azomethines in the nematic phase, which is induced by electronic donor-acceptor properties of the terminal substituents of the benzylideneaniline core is studied. These degrees of freedom related to the rotation angles phi (k) around the bonds between the substituent and the aniline ring (phi(1)) and also between the CH=N bridge and the aniline ring (omega(2)) are characterized by the parameters Q (k) = aOE (c) cos(2)phi (k) >. It is found that the interaction of these degrees of freedom is manifested in the linear dependence Q (2)(Q (1)). Within the phenomenological theory the effect of this interaction on changes delta (k) in the Q (k) values during the nematic liquid crystal-isotropic liquid phase transition is revealed along with the temperature T (NI) and character of this transition. The derivation of previously established empirical dependences T (NI)(Q (k) ) is presented in the presence of direct and indirect steric effects of side substituents affecting the Q (k) values. A diverse combination of delta (k) signs in the nematic phase, which is a prerequisite for the conformational polymorphism of the nematic phases of azomethines, is shown.
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Аверьянов, Евгений Михайлович. Структурные и термодинамические следствия взаимодействия конформационных степеней свободы азометинов [Текст] / Е. М. Аверьянов // Журн. структ. химии. - Новосибирск : Изд-во СО РАН, 2014. - Т. 55 № 4. - С. 641 - 647
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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9.
Theoretical investigation of
the adsorption and diffusion of hydrogen on the surface and in the bulk of the intermetallic
compound
Mg2Ni / A. A. Kuzubov [et al.]> // Phys. Solid State. - 2014. -
Vol. 56
,
Is. 10
. - P. 2035-2042,
DOI
10.1134/S1063783414100187. - Cited References: 30 . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
STORAGE MATERIAL Mg2NiH4
INITIO MOLECULAR-DYNAMICS
AUGMENTED-WAVE METHOD
MINIMUM ENERGY PATHS
ELASTIC BAND METHOD
TEMPERATURE STRUCTURE
SADDLE-POINTS
ALLOYS
TRANSITION
MAGNESIUM
Аннотация:
The intermetallic
compound
Mg2Ni as a potential material for hydrogen storage has been investigated theoretically. The sorption and diffusion of a hydrogen atom in the bulk and on the surface of this material, as well as the step-by-step process of dissociative chemisorption of a H-2 molecule on the surface, have been considered. The dependence of the sorption energy of atomic hydrogen on the structural characteristics of the intermetallic
compound
Mg2Ni has been analyzed.
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Теоретическое изучение сорбции и диффузии водорода на поверхности и в объеме интерметаллида Mg2Ni [Текст] / А. А. Кузубов [и др.] // Физ. тверд. тела. - 2014. - T. 56 Вып. 10. - С. 1970-1977
Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia
Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Eliseeva, N. S.; Krasnov, P. O.; Краснов, Павел Олегович; Kuklin, A. V.; Куклин, Артем Валентинович; Kovaleva, E. A.; Kholtobina, A. S.
}
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10.
New class of
bicyclic compounds derived from thiobarbituric acid with representative
compound
1,3-diethyl-7-hydroxy-5,5,7-trimethyl-2-thioxo-1,2,3,5,6,7-hexahydro-4H-pyrano[2,3-d]pyrimidin-4-one. Preparation, crystal structure, mass spectrometry and IR spectroscopy / N. N. Golovnev [et al.]> // J. Mol. Struct. - 2015. -
Vol. 1102
. - P. 101-107,
DOI
10.1016/j.molstruc.2015.08.046. - Cited References: 40. - The work was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University in 2015 (Contract 3049). V.V.A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of the investigation (Contract 14.607.21.0106). The authors also thank SFU CEJU for the technical support . - ISSN 0022-2860
Перевод заглавия:
Новый класс бициклических соединений полученных из тиобарбитуровой кислоты с представителем 1,3-диэтил-7-гидрокси-5,5,7-триметил-2-тиоксо-1,2,3,5,6,7-гексагидро-4H-пирано[2,3-d]пиримидин-4-он. Синтез, кристаллическая структура, масс спектроскопия и ИК спектроскопия
Рубрики:
1,3-diethyl-2-thiobarbituric acid
Crystal-structure
2-thiobarbituric acid
Barbituric-acid
Hydrogen-bond
Derivatives
Diffraction
Equilibria
Inhibitors
Series
Кл.слова (ненормированные):
Bicyclic compounds
--
Thiobarbiturates
--
Heterocycles
--
X-ray diffraction
--
IR spectroscopy
--
Theoretical calculations
Аннотация:
The colorless crystals of 1,3-diethyl-7-hydroxy-5,5,7-trimethyl-2-thioxo-1,2,3,5,6,7-hexahydro-4H-pyrano[2,3-d]pyrimidin-4-one (1) have been crystallized from the solution containing 1,3-diethyl-2-thiobarbituric acid (HDETBA) and equal volumes of concentrated HCl and acetone A possible stoichiometric reaction mechanism has been suggested. The crystal structure of 1 has been determined by X-ray single crystal analysis. The phase purity of the precipitate has been verified by powder X-ray diffraction analysis.
Compound
1 crystallizes in the orthorhombic structure, space group P212121, with cell parameters a = 9.7454(4), b = 11.2225(4), c = 13.9171(5) Å, Z = 4, V = 1522.1(1) Å3. The molecules of 1 contain the bicyclic ring constructions new in thiobarbiturates. The molecules of 1 are linked by O-H...O hydrogen bonds to infinite molecule chains. The results of mass spectrometric analysis, theoretical studies and IR spectroscopy confirm the structure of 1. Using the PASS software, the general pharmacological potential of 1 was analyzed.
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Держатели документа:
Siberian Federal University, Svobodny Aven. 79, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, SB RAS, Bld. 38, Akademgorodok 50, Krasnoyarsk, Russian Federation
Far Eastern State Transport University, 47 Serysheva Str., Khabarovsk, Russian Federation
Laboratory of Physical Chemistry, Irkutsk Favorsky Institute of Chemistry, SB RAS, 1 Favorsky, Irkutsk, Russian Federation
Laboratory of Optical Materials and Structures, SB RAS, Institute of Semiconductor Physics, 13 Lavrentiev Aven., Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, 36 Lenin Aven., Tomsk, Russian Federation
Laboratory of Semiconductor, Dielectric Materials, Novosibirsk State University, 2 Pirogov Str., Novosibirsk, Russian Federation
Institute of Thermophysics, 1 Lavrentiev Aven., Novosibirsk, Russian Federation
Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, I. V.; Goryunov, Y. V.; Atuchin, V. V.
}
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11.
Magnetic properties of
LuFeTi2O7
compound
/ T. V. Drokina [et al.]> //
Int. Workshop on Phase Transit. and Inhomogeneous States in Oxides : book of abstracts. - Kazan, 2015. - P. 77
Материалы конференции
Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Bartolome, J.; Arauzo, A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; 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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12.
Thermal, structural, optical,
dielectric and barocaloric properties at ferroelastic phase transition in trigonal (NH4)2SnF6: A new look at the old
compound
/ I. N. Flerov [et al.]> // J. Fluor. Chem. - 2016. -
Vol. 183
. - P. 1-9,
DOI
10.1016/j.jfluchem.2015.12.010. - Cited References: 25. - The reported study was partially supported by RFBR, research project No. 15-02-02009a. . - ISSN 0022-1139
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Organic
Рубрики:
Heat-capacity
Ammonium
(NH4)3TiF7
Pressure
Кл.слова (ненормированные):
Fluorides
--
Structural disorder
--
Phase transitions
--
Entropy
--
Barocaloric effect
Аннотация:
Structural phase transition P-3m1 → P-1 of the first order and nonferroelectric nature was found in (NH4)2SnF6 at about 110 K in the process of thermal, optical, dielectric and X-ray studies. Order-disorder transformation is accompanied by large changes of entropy (ΔS0 = 16.4 J/mol K) and volume (ΔV0/V ≈ 1%). The structural model associated with three orientations of NH4 tetrahedra in P-3m1 phase and their complete ordering in P-1 phase was suggested with the entropy change (ΔS0 = 18.3 J/mol K) close to the experimental value. A good agreement between baric coefficients measured in a direct way (dT0/dp = -157 K/GPa) and evaluated using entropy and volume changes at phase transition (-170 K/GPa) was found. Barocaloric effects in (NH4)2SnF6 are comparable with those of known solid state refrigerants and are characterised by a low-pressure need for realising their maximum values. © 2015 Elsevier B.V. All rights reserved.
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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of RAS, Akademgorodok 50, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radioelectronics, Siberian State University, Krasnoyarsk, Russian Federation
Astafijev Krasnoyarsk State Pedagogical University, Krasnoyarsk, Russian Federation
Krasnoyarsk State Agrarian University, Krasnoyarsk, Russian Federation
Far Eastern State Transport University, Khabarovsk, Russian Federation
Institute of Chemistry, Far Eastern Branch of RAS, Vladivostok, Russian Federation
Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Mel'nikova, S. V.; Мельникова, Светлана Владимировна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Laptash, N. M.
}
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13.
Zhandun, V. S.
The effect of structural ordering on the magnetic, electronic, and optical properties of the LaPbMnSbO6 double perovskite / V. S. Zhandun, V. I. Zinenko> // J. Alloys Compd. - 2016. -
Vol. 671
. - P. 184-191,
DOI
10.1016/j.jallcom.2016.02.085. - Cited References:32. - This work was supported by the Russian Foundation for Basic Research, project no. 15-02-00340-a and the Grant of the President of the Russian Federation for Support of Leading Scientific Schools no. NSH-924.2014.2. . - ISSN 0925-8388. - ISSN 1873-4669
РУБ
Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
SYSTEMS
NI
CO
Кл.слова (ненормированные):
Ab initio calculation
--
Double perovskite
--
Magnetic materials
--
Optical
--
properties
--
Electronic properties
--
Magnetic properties
--
Layer
compound
Аннотация:
The interplay between the magnetic, electronic, and optical properties and the cation structural ordering in the LaPbMnSbO6 double perovskite is studied using the Vienna Ab Initio Simulation Package (VASP). The layer and rock-salt cation ordering types are investigated. Both of them are of great importance. The rock-salt ordering of B-site cations is one of the most frequently met cation ordering types in double perovskites; the layer ordering of both cations, which can be considered as a heterostructure, is interesting for fundamental research and experimental synthesis. It was established that the properties of the two investigated structures are strongly different. The
compound
with the layered structure exhibits the behavior typical of a semimetal with the ferromagnetic configuration of magnetic moments, which is unusual for a double perovskite. The rock-salt structure behaves as an antiferromagnetic insulator. Another surprising feature of the structure with the layer ordering is the coexistence of a polar phase and the metal-type conductivity. The calculated optical characteristics of the two ordered structures are compared with the experimental dates. (C) 2016 Elsevier B.V. All rights reserved.
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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Akademgorodok 50,Bid 38, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Aerosp Univ, Krasnoyarskiy Rabochii 31, Krasnoyarsk 660037, Russia.
Доп.точки доступа:
Zinenko, V. I.; Зиненко, Виктор Иванович; Жандун, Вячеслав Сергеевич; Russian Foundation for Basic Research [15-02-00340-a]; Russian Federation [NSH-924.2014.2]
}
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14.
First outer-sphere 1,3-diethyl-2-thiobarbituric
compounds [M(H2O)6](1,3-diethyl-2-thiobarbiturate)2·2H2O (M = Co2+, Ni2+): Crystal structure, spectroscopic and thermal properties / N. N. Golovnev [et al.]> // Chem. Phys. Lett. - 2016. -
Vol. 653
. - P. 54-59,
DOI
10.1016/j.cplett.2016.04.059. - Cited References: 50. - The study was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University in 2015-2016. V.V. A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of the investigation. X-ray data were obtained with use the analytical equipment of Krasnoyarsk Center of collective use of SB RAS. . - ISSN 0009-2614
Перевод заглавия:
Первые соединения с внешнесферным 1,3-диэтил-2-тиобарбитуратом [M(H2O)6](1,3-диэтил-2-2тиобарбитурат)2·2H2O (M=Co2+, Ni2+): кристаллическая структура, спектроскопия и тепловые свойства
РУБ
Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
Thiobarbituric acid complexes
Transition-metal-complexes; 2-thiobarbituric acid; hydrogen-bond
2-thiobarbituric acid
Hydrogen-bond
Chemistry
Transformation
Diffraction
Ligand
Series
Copper
Кл.слова (ненормированные):
1,3-Diethyl-2-thiobarbituric acid
--
Nickel(II)
--
Cobalt(II)
--
Coordination
compound
--
X-ray diffraction
--
Infrared spectroscopy
--
Thermal analysis
Аннотация:
Two new d-element compounds, [Co(H2O)6](Detba)2·2H2O (1) and [Ni(H2O)6](Detba)2·2H2O (2) (HDetba - 1,3-diethyl-2-thiobarbituric acid) were synthesized and characterized by single-crystal and powder X-ray diffraction analysis, TG-DSC and FT-IR. Structural analysis revealed that (1) and (2) are discrete structures, in which M2+ ion (M = Co, Ni) is six-coordinated by water molecules and it forms an octahedron. The outer-sphere Detba- ions and H2O molecules participate in O-H?(O/S) intermolecular hydrogen bonds which form the 2D layer. Thermal decomposition includes the stage of dehydration and the following stage of oxidation of Detba- with a release of CO2, SO2, H2O, NH3 and isocyanate gases. © 2016 Elsevier B.V. All rights reserved.
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Держатели документа:
Department of Chemistry, Siberian Federal University, 79 Svobodny Aven., Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, bld. 38, Akademgorodok 50, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, 47 Seryshev Str., Khabarovsk, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, 13 Lavrentiev Aven., Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, 36 Lenin Aven., Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, 2 Pirogov Str., Novosibirsk, Russian Federation
Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.; Atuchin, V. V.
}
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15.
Structural and magnetic
features of solid-phase transformations in Mn/Bi and Bi/Mn films / V. G. Myagkov [et al.]> // JETP Letters. - 2016. -
Vol. 103
,
Is. 4
. - P. 254-259,
DOI
10.1134/S0021364016040111. - Cited References: 47. - This work was supported by the Russian Foundation for Basic Research (project nos. 15-02-00948 and 16-03-00069), by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. SP-317.2015.1), and by the Foundation for Promotion of the Development of Small Scientific and Engineering Enterprises (project nos. 0011727 and 6662GU2015, program Umnik). The electron microscopy studies were performed on the equipment of the Shared Usage Center, Krasnoyarsk Research Center, Siberian Branch, Russian Academy of Sciences. . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
High-temperature synthesis
Epitaxial thin-films
State synthesis
Martensitic transformations
Vacuum depositions
MnBi filmsd
Bi
System
Anisotropy
Compound
Аннотация:
Solid-phase transformations at different annealing temperatures in Mn/Bi (Mn on Bi) and Bi/Mn (Bi on Mn) films have been studied using X-ray diffraction, electron microscopy, and magnetic measurements. It has been shown that the synthesis of the α-MnBi phase in polycrystalline Mn/Bi films begins at a temperature of ~120°C and the Mn and Bi layers react completely at 300°C. The resulting α-MnBi(001) samples have a large perpendicular magnetic anisotropy (Ku ≃ 1.5 × 107 erg/cm3) and a coercive force H HC ~ 3 kOe. In contrast to Mn/Bi, the ferromagnetic α-MnBi phase in Bi/Mn films is not formed even at annealing processes up to 400°C and Mn clusters are formed in a Bi melt. This asymmetry in phase transformations occurs because chemosorbed oxygen existing on the surface of the Mn film in Bi/Mn films suppresses a solid-phase reaction between Mn and Bi. The analysis of the results obtained implies the existence of new low-temperature (~120°C) structural transformation in the Mn–Bi system. © 2016, Pleiades Publishing, Inc.
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Публикация на русском языке
Структурные и магнитные особенности твердофазных превращений в Mn/Bi и Bi/Mn пленках [Текст] / В. Г. Мягков [и др.] // Письма в ЖЭТФ : Наука, 2016. - Т. 103 Вып. 4. - С. 280-285
Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, pr. Gazety Krasnoyarskii Rabochii, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Matsynin, A. A.; Мацынин, Алексей Александрович; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Seredkin, V. A.; Середкин, Виталий Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Bondarenko, G. N.; Бондаренко, Галина Николаевна
}
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16.
Modulated magnetic structure
in quasi-one-dimensional clinopyroxene NaFeGe2O6 / T. V. Drokina [et al.]> // J. Exp. Theor. Phys. - 2011. -
Vol. 112
,
Is. 1
. - P. 121-126,
DOI
10.1134/S1063776110061093. - Cited References: 18 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Кл.слова (ненормированные):
Antiferromagnetics
--
Clinopyroxenes
--
Field dependence
--
Helical modulation
--
Incommensurate magnetic structures
--
Magnetic phase transitions
--
Monoclinic
compound
--
Order-disorder
--
Orientation phase transitions
--
Quasi-one-dimensional
--
Temperature behavior
--
Temperature dependence
--
Wave vector
--
Antiferromagnetism
--
Magnetic devices
--
Magnetic structure
--
Phase transitions
--
Crystallography
Аннотация:
The magnetic structure of the NaFeGe2O6 monoclinic
compound
has been experimentally investigated using the elastic scattering of neutrons. At a temperature of 1.6 K, an incommensurate magnetic structure has been observed in the form of an antiferromagnetic helix formed by a pairs of the spins of the Fe3+ ions with helical modulation in the ac plane of the crystal lattice. The wave vector of the magnetic structure has been determined and its temperature behavior has been studied. The analysis of the temperature dependences of the specific heat and susceptibility, as well as the isotherms of the field dependence of the magnetization, has revealed the existence of not only the order-disorder magnetic phase transition at the point T (N) = 13 K, but also an additional magnetic phase transition at the point T (c) = 11.5 K, which is assumingly an orientation phase transition.
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Держатели документа:
[Drokina, T. V.
Petrakovskii, G. A.
Balaev, A. D.
Kartashev, A. V.
Ivanov, D. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Drokina, T. V.
Petrakovskii, G. A.] Siberian Fed Univ, Krasnoyarsk 660074, Russia
[Keller, L.
Schefer, J.] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
[Keller, L.
Schefer, J.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660074, Russian Federation
Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, Villigen PSI CH-5232, Switzerland
Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Keller, L.; Schefer, J.; Balaev, A. D.; Балаев, Александр Дмитриевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Ivanov, D. A.
}
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17.
Commensurate spin density
wave in LaFeAsO: A local probe study / H. H. Klauss [et al.]> // Phys. Rev. Lett. - 2008. -
Vol. 101
,
Is. 7
. - Ст. 77005,
DOI
10.1103/PhysRevLett.101.077005. - Cited References: 28 . - ISSN 0031-9007
РУБ
Physics, Multidisciplinary
Рубрики:
LAYERED QUATERNARY
COMPOUND
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
Arsenic compounds
--
Chlorine compounds
--
Ferromagnetism
--
Magnetic materials
--
Magnetic properties
--
Magnetization
--
Magnets
--
Molybdenum
--
Phase transitions
--
Spin density waves
--
Commensurate spin density wave
--
External fields
--
Magnetic orders
--
Muon spin relaxations
--
Order parameter
--
Ordered moments
--
Probe measurements
--
Ssbauer spectroscopy
--
Structural phase transition
--
Sublattice magnetizations
--
Temperature dependences
--
Spin dynamics
Аннотация:
We present a detailed study on the magnetic order in the undoped mother
compound
LaFeAsO of the recently discovered Fe-based superconductor LaFeAsO(1-x)F(x). In particular, we present local probe measurements of the magnetic properties of LaFeAsO by means of (57)Fe Mossbauer spectroscopy and muon-spin relaxation in zero external field along with magnetization and resistivity studies. These experiments prove a commensurate static magnetic order with a strongly reduced ordered moment of 0.25(5)mu(B) at the iron site below T(N)=138 K, well separated from a structural phase transition at T(S)=156 K. The temperature dependence of the sublattice magnetization is determined and compared to theory. Using a four-band spin density wave model both, the size of the order parameter and the quick saturation below T(N) are reproduced.
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Держатели документа:
[Klauss, H. -H.] Tech Univ Dresden, Inst Festkorperphys, D-01069 Dresden, Germany
Amato, A.] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Buechner, B.] Leibniz Inst Festkorper & Weskstoffforsch IFW, D-01171 Dresden, Germany
Kraken, M.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys Kondensierten Mat, D-38106 Braunschweig, Germany
Eremin, I.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Eremin, I.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany
Institut fur Festkorperphysik, TU Dresden, D-01069 Dresden, Germany
Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Leibniz-Institut fur Festkorper- und Werkstoffforschung (IFW) Dresden, D-01171 Dresden, Germany
Institut fur Physik der Kondensierten Materie, TU Braunschweig, D-38106 Braunschweig, Germany
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institut fur Mathematische Physik, TU Braunschweig, D-38106 Braunschweig, Germany
Доп.точки доступа:
Klauss, H. H.; Luetkens, H.; Klingeler, R.; Hess, C.; Litterst, F. J.; Kraken, M.; Korshunov, M. M.; Коршунов, Максим Михайлович; Eremin, I.; Drechsler, S. L.; Khasanov, R.; Amato, A.; Hamann-Borrero, J. E.; Leps, N.; Kondrat, A.; Behr, G.; Werner, J.; Buchner, B.
}
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18.
Magnetic structure and
magnetic excitations in the two-dimensional spin system of the Cu3B2O6
compound
/ G. A. Petrakovskii [et al.]> // Phys. Solid State. - 2007. -
Vol. 49
,
Is. 7
. - P. 1315-1320,
DOI
10.1134/S1063783407070207. - Cited References: 21 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
LONG-RANGE ORDER
HEISENBERG-MODEL
GROUND-STATE
GAP
ANTIFERROMAGNET
SRCU2(BO3)(2)
CUGEO3
CHAINS
CAV4O9
Аннотация:
This paper reports on the results of measurements of the magnetic susceptibility, heat capacity, neutron scattering, muon spin relaxation, and electron paramagnetic resonance in Cu3B2O6 for the study of the ground state of the spin system of this
compound
. The results obtained suggest that, at a temperature of 10 K, the spin subsystem of the crystal, which consists of single spins and clusters of pairs and fours of spins interacting with one another, undergoes a transition to a state representing a superposition of the singlet (for clusters) and magnetically ordered (for single spins) states.
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Держатели документа:
LV Kirenskii Inst Phys, Siberian Div, Russian Acad Sci, Krasnoyarsk 660036, Russia
Paul Scherrer Inst, Villigen, Switzerland
Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Paul-Scherrer Institute, Villigen, Switzerland
Institute of Physics, Polish Academy of Sciences, Warsaw 02-668, Poland
Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Popov, M. A.; Schefer, J.; Neidermayer, C.; Aleshkevich, P.; Szymczak, R.
}
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19.
Multiple-quantum-well-based photonic crystals
with simple and
compound
elementary supercells / E. L. Ivchenko [et al.]> // Phys. Rev. B. - 2004. -
Vol. 70
,
Is. 19
. - Ст. 195106,
DOI
10.1103/PhysRevB.70.195106. - Cited References: 33 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
EXCITON POLARITONS
DIELECTRIC MEDIUM
OPTICAL LATTICES
BRAGG STRUCTURES
BAND-STRUCTURES
PERIODIC-BRAGG
REFLECTION
ABSORPTION
SPECTRA
ARRAYS
Кл.слова (ненормированные):
article
--
crystal
--
crystal structure
--
elementary particle
--
light scattering
--
mathematical analysis
Аннотация:
Exciton polaritons in one-dimensional photonic crystals based on multiple quantum well structures are investigated. The effects due to interplay between resonant interaction of light with quantum well excitons, and light scattering from well-barrier interface, are elucidated. Polariton dispersion equations and reflection spectra in structures with two wells in an elementary supercell of the periodic structure are studied. Several examples of different
compound
elementary supercells are considered. Special attention is paid to structures with the period or the distance between quantum wells satisfying the resonance Bragg condition. Such structures are characterized by a presence of a larger-than-usual polariton stop band. It is shown that in structures with a complex elementary supercell, the width of such a stop band can be significantly enhanced in comparison to that in simple structures.
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Держатели документа:
AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
CUNY Queens Coll, Dept Phys, Flushing, NY 11367 USA
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
A.F. Ioffe Phys.-Technical Institute, RAS Politekhnicheskaya Str. 26, St. Petersburg, 194021, Russian Federation
Physics Department, Queens College, City University of New York, Flushing, NY 11367, United States
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Ivchenko, E. L.; Voronov, M. M.; Erementchouk, M. V.; Deych, L. I.; Lisyansky, A. A.
}
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20.
Heat capacity of
the PbFe1/2Ta1/2O3 perovskite-like
compound
/ M. V. Gorev [et al.]> // Phys. Solid State. - 2004. -
Vol. 46
,
Is. 3
. - P. 521-525,
DOI
10.1134/1.1687872. - Cited References: 26 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
PBFE0.5TA0.5O3
FERROELECTRICS
DIFFRACTION
NIOBATE
GROWTH
Аннотация:
The heat capacity C-p(T) of the complex perovskite PbFe1/2Ta1/2O3 has been studied using adiabatic calorimetry in the temperature range 150-370 K. Three diffuse anomalies in C-p(T) are found to exist at temperatures T-d approximate to 350 K, T-m approximate to 250-300 K, and T-c approximate to 205 K. The anomalous and the lattice contribution to the heat capacity are separated, and the change in the entropy is determined. The results of the study are discussed jointly with the data on the structure and physical properties of the
compound
. (C) 2004 MAIK "Nauka / Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, CEMES, F-31055 Toulouse, France
INFM, I-090124 Cagliari, Italy
Dipartimento Fis, I-090124 Cagliari, Italy
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CEMES-CNRS, 29 Rue Jeanne Marvig, Toulouse, 31055, France
Inst. Naz. di Fisica della Materia, Dipartimento di Fisica, Monserrato (Cagliari), 090124, Italy
Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Sciau, P.; Lehmann, A. G.
}
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полный формат
краткий формат
все найденные
отмеченные
кроме отмеченных
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