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1.
Deich, L. I.
Effect of spatial fluctuations of the magnetization
modulus
on the properties of amorphous ferromagnets / L. I. Deich, V. A. Ignatchenko> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1991. -
Vol. 99
,
Is. 3
. - P. 816-830. - Cited References: 27 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
Рубрики:
TEMPERATURE-DEPENDENCE
SPIN-WAVES
FILMS
SATURATION
LAW
Аннотация:
A model of amorphous ferromagnets with longwave spatial fluctuations of the magnetization
modulus
M is studied. It is shown that for a correct understanding of the properties of the model, it is principally necessary to take into account the magnetic dipole interaction. This interaction enhances the contribution of the fluctuations of M to the ground state, dispersion law and spin wave attenuation. The spectral and correlation properties of the inhomogeneous ground state and the law of approach of the magnetization to saturation in the model are studied. The dispersion law and spin wave attenuation are investigated. A novel mechanism of formation of a correction of the form T5/2 to the Bloch law in the low temperature dependence of the magnetization is proposed.
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Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
}
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2.
Aplesnin, S. S.
Anomalies in magnetoresistance and in the bulk
modulus
for ferromagnetics with four-spin exchange interaction on the Kondo lattice / S. S. Aplesnin, N. I. Piskunova> // J. Phys.: Condens. Matter. - 2006. -
Vol. 18
,
Is. 29
. - P. 6859-6868,
DOI
10.1088/0953-8984/18/29/023. - Cited References: 29 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
MIXED-VALENCE MANGANITES
PHASE-SEPARATION
LA1-XSRXMNO3
BEHAVIOR
PECULIARITIES
TRANSITION
Кл.слова (ненормированные):
Elastic moduli
--
Electric resistance
--
Ferromagnetism
--
Function evaluation
--
Paramagnetism
--
Transceivers
--
Adiabatic approximation
--
Kondo lattice
--
Paramagnetic state
--
Ring exchange
--
Magnetoresistance
Аннотация:
The temperature dependence of resistivity and the bulk
modulus
are calculated on the Kondo lattice, with ring exchange between localized spins, using the spin-polaron and adiabatic approximation. Peak and zero values of the bulk
modulus
as functions of temperature and concentration are determined below the temperature of the transition to the paramagnetic state. The effects of the nearest order between transverse spin components and a value of the ring exchange between localized spins on magnetoresistivity are estimated.
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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
L v Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk, 660014, Russian Federation
Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
}
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3.
Theoretical Study of
Atomic Structure and Elastic Properties of Branched Silicon Nanowires / P. B. Sorokin [et al.]> // ACS Nano. - 2010. -
Vol. 4
,
Is. 5
. - P. 2784-2790,
DOI
10.1021/nn9018027. - Cited Reference Count: 28. - Гранты: P.B.S. acknowledges partial support by the National Science Foundation grant CMMI-0708096, NIRT. L.A.C. was supported by the Russian Academy of Sciences, program No. 21. P.V.A. and P.B.S. also acknowledge the collaborative RFBR-JSPS Grant No. 09-02-92107-Phi. All calculations have been performed on the Joint Supercomputer Center of the Russian Academy of Sciences. The geometry of all presented structures was visualized by ChemCraft software. - Финансирующая организация: National Science Foundation [CMMI-0708096]; NIRT; Russian Academy of Sciences [21]; RFBR-JSPS [09-02-92107-Phi] . - MAY. - ISSN 1936-0851
Рубрики:
ELECTRONIC-PROPERTIES
BUILDING-BLOCKS
NANOCRYSTALS
Кл.слова (ненормированные):
silicon nanowires
--
elastic properties
--
molecular mechanics
--
Tersoff potential
--
Elastic properties
--
Molecular mechanics
--
Silicon nanowires
--
Tersoff potential
--
Atomic structure
--
Branch length
--
Elastic properties
--
Interatomic potential
--
Silicon Nanowires
--
Tersoff potential
--
Theoretical study
--
Young
modulus
--
Carbon nanotubes
--
Elasticity
--
Molecular mechanics
--
Nanowires
--
Stiffness
--
Crystal atomic structure
--
nanowire
--
silicon
--
article
--
chemical structure
--
chemistry
--
conformation
--
elasticity
--
mechanical stress
--
Young
modulus
--
Elastic
Modulus
--
Elasticity
--
Models, Molecular
--
Molecular Conformation
--
Nanowires
--
Silicon
--
Stress, Mechanical
Аннотация:
The atomic structure and elastic properties of Y-shaped silicon nanowires of "fork"- and "bough"-types were theoretically studied, and effective Young moduli were calculated using Tersoff interatomic potential. The oscillation of fork Y-type branched nanowires with various branch lengths and diameters was studied. In the final stages of the bending, the formation of new bonds between different parts of the wires was observed. It was found that the stiffness of the nanowires is comparable with the stiffness of Y-shaped carbon nanotubes.
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Держатели документа:
Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Sorokin, P.B.; Kvashnin, A.G.; Kvashnin, D.G.; Filicheva, J.A.; Avramov, P. V.; Аврамов, Павел Вениаминович; Chernozatonskii, L.A.; Fedorov, A. S.; Федоров, Александр Семенович
}
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4.
Theoretical study of
elastic properties of SiC nanowires of different shapes / P. B. Sorokin [et al.]> // J. Nanosci. Nanotechnol. - 2010. -
Vol. 10
,
Is. 8
. - P. 4992-4997,
DOI
10.1166/jnn.2010.2424. - Cited Reference Count: 49. - Гранты: This work was partially supported by JSPS-RFBR collaborative grant 09-02-92107. The electronic structure calculations have been performed on the Joint Supercomputer Centre of the Russian Academy of Sciences. One of the authors (Pavel V. Avramov) acknowledges the encouragement of Professor K. Morokuma, research leader of Fukui Institute, Kyoto University and Dr. Alister Page for kind help and support. The geometry of all structures was visualized by ChemCraft software.SUP53/SUP. - Финансирующая организация: JSPS-RFBR [09-02-92107]; Fukui Institute, Kyoto University . - ISSN 1533-4880. - ISSN 1533-4899
Рубрики:
INITIO MOLECULAR-DYNAMICS
SILICON-CARBIDE
THERMAL-STABILITY
CARBON NANOTUBES
NANORODS
GROWTH
SURFACES
NANOCRYSTALS
POTENTIALS
CONSTANTS
Кл.слова (ненормированные):
Silicon Carbide
--
Nanowires
--
Elastic Properties
--
DFT
--
Molecular Mechanics
--
DFT
--
Elastic properties
--
Molecular mechanics
--
Nanowires
--
Silicon carbide
--
Atomic structure
--
Cubic phasis
--
DFT
--
Effective size
--
Elastic properties
--
SiC nanowire
--
Silicon carbide nanowires
--
Theoretical study
--
Wire geometries
--
Young's
Modulus
--
Crystal atomic structure
--
Density functional theory
--
Elastic moduli
--
Elasticity
--
Molecular mechanics
--
Nanowires
--
Wire
--
Silicon carbide
Аннотация:
The atomic structure and elastic properties of silicon carbide nanowires of different shapes and effective sizes were studied using density functional theory and classical molecular mechanics. Upon surface relaxation, surface reconstruction led to the splitting of the wire geometry, forming both hexagonal (surface) and cubic phases (bulk). The behavior of the pristine SiC wires under compression and stretching was studied and Young's moduli were obtained. For Y-shaped SiC nanowires the effective Young's moduli and behavior in inelastic regime were elucidated.
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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Sorokin, P.B.; Kvashnin, D.G.; Kvashnin, A.G.; Avramov, P. V.; Аврамов, Павел Вениаминович; Chernozatonskii, L.A.
}
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5.
Mobility of Vacancies
under Deformation and Their Effect on the Elastic Properties of Graphene / A. S. Fedorov [et al.]> // J. Exp. Theor. Phys. - 2011. -
Vol. 112
,
Is. 5
. - P. 820-824,
DOI
10.1134/S1063776111040042. - Cited References: 35 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
WALLED CARBON NANOTUBES
INITIO MOLECULAR-DYNAMICS
AB-INITIO
GRAPHITE SURFACES
DEFECTS
IRRADIATION
HYDROGEN
POINTS
Кл.слова (ненормированные):
Ab initio
--
Applied strain
--
Density-functional methods
--
Elastic properties
--
Graphene sheets
--
Linear dependence
--
Potential barriers
--
Transition state theories
--
Young's
Modulus
--
Elasticity
--
Graphene
Аннотация:
The effect of isolated vacancies on the elastic properties of a graphene sheet has been investigated by the ab initio density functional method. An almost inverse linear dependence of the Young's
modulus
on the concentration of vacancies has been revealed. The height of potential barriers for the motion of vacancies in various directions has been calculated as a function of various independent applied strains. The velocity of vacancies at various temperatures has been calculated as a function of applied strains using the transition state theory. DOI: 10.1134/S1063776111040042
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Держатели документа:
[Fedorov, A. S.
Popov, Z. I.
Kuzubov, A. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Fedorov, D. A.
Anan'eva, Yu. E.
Eliseeva, N. S.
Kuzubov, A. A.] Siberian Fed Univ, Krasnoyarsk 660028, Russia
ИФ СО РАН
Siberian Branch, Kirensky Institute of Physics, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660028, Russian Federation
Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Fedorov, D. A.; Федоров, Дмитрий Александрович; Popov, Z. I.; Попов, Захар Иванович; Anan'eva, Y. E.; Eliseeva, N. S.; Kuzubov, A. A.; Кузубов, Александр Александрович
}
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6.
First-principles calculations of
the equations of state and relative stability of iron carbides at the Earth's core pressures / K. D. Litasov [et al.]> // Russ. Geol. Geophys. - 2015. -
Vol. 56
,
Is. 1-2
. - P. 164-171,
DOI
10.1016/j.rgg.2015.01.010. - Cited References:50. - The study was supported by the Russian Science Foundation (grant no. 14-17-00601) and a grant for young scientists from the President of the Russian Federation (MD-500.2013.5) under a project of the Ministry of Education and Science (no. 14.B25.31.0032). The work of S.G. Ovchinnikov and Z.I. Popov was also supported by the Leading Science School program (no. NSh-2886.2014.2). . - ISSN 1068. - ISSN 1878-030X. -
РУБ
Geosciences, Multidisciplinary
Рубрики:
AUGMENTED-WAVE METHOD
Fe-C SYSTEM
AB-INITIO
OF-STATE
CARBON
MANTLE
Кл.слова (ненормированные):
iron carbide
--
Earth's core
--
first-principles calculations
--
density
--
bulk
--
modulus
--
magnetic moment
Аннотация:
Recent experimental studies have demonstrated that Fe3C is more stable than Fe7C3 under PT-conditions of the Earth's core. Theoretical calculations at 0 K, in turn, show the possible stability of Fe2C at the core pressures. Therefore, a theoretical modeling of iron carbides at <=500 GPa is carried out. Energetically stable phases and the pressures of magnetic transitions at 0 K are determined. The parameters of magnetic transitions for Fe7C3 and Fe3C are consistent with those determined in the previous papers. The phase transition from Pnnm to Pnma in Fe2C at 28 GPa is estimated. At > 100 GPa, Fe2C loses its magnetic moment. Assuming carbon to be the only light element in the system, the first-principles calculations yield 2.7-2.9 and 2.0-2.2 wt.% C at the boundary of the inner core at 5000 and 7000 K, respectively.
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Публикация на русском языке
Первопринципные расчеты уравнений состояния и относительной стабильности карбидов железа при давлениях ядра земли [Текст] / К. Д. Литасов [и др.] // Геол. и геофиз. - Новосибирск : Изд-во СО РАН, 2015. - Т. 56 № 1-2. - С. 214-223
Держатели документа:
Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Litasov, K. D.; Popov, Z. I.; Попов, Захар Иванович; Gavryushkin, P. N.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Fedorov, A. S.; Федоров, Александр Семенович; Russian Science Foundation [14-17-00601]; Russian Federation under Ministry of Education and Science [MD-500.2013.5, 14.B25.31.0032]; Leading Science School program [NSh-2886.2014.2]
}
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7.
Temperature dependent elastic
repulsion of colloidal nanoparticles with a polymer adsorption layer / A. P. Gavrilyuk [et al.]> // Colloid Polym. Sci. - 2018. -
Vol. 296
,
Is. 10
. - P. 1689-1697,
DOI
10.1007/s00396-018-4383-y. - Cited References: 49. - The reported research was funded by the Russian Foundation for Basic Research, the government of the Krasnoyarsk territory and Krasnoyarsk Regional Fund of Science, grant 18-42-243023, the RF Ministry of Science and Education, the State contract with Siberian Federal University for scientific research in 2017-2019, and SB RAS Program No II.2P (0358-2015-0010). . - ISSN 0303-402X. - ISSN 1435-1536
РУБ
Chemistry, Physical + Polymer Science
Рубрики:
STERICALLY-STABILIZED PARTICLES
DEPLETION FLOCCULATION
AGGREGATION
Кл.слова (ненормированные):
Nanoparticle
--
Adsorption layer
--
Elastic deformation
--
Coagulation
--
kinetics
--
Elasticity
modulus
Аннотация:
The model of pairwise elastic repulsion of contacting colloidal nanoparticles with a rigid core and deformable shell is discussed. A simple analytical equation is applied for the energy of elastic repulsion of nanoparticles with arbitrary sizes and the elasticity moduli of self-healing polymer adsorption layers. The model is based on the representation of the absorption layer as a continuous medium that is elastically deformed upon the contact of nanoparticles. The major characteristic of this medium is the elasticity
modulus
. The magnitude of the elasticity
modulus
is determined from the condition of balance of the van der Waals attractive forces of nanoparticles and the elastic repulsion of their adsorption layers in the contact area, taking into account the temperature variations. We employed the kinetic approach to describe the dependence of the elasticity
modulus
on both the temperature and the rate of its change.
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Держатели документа:
RAS, SB, Inst Computat Modeling, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Math & Comp Sci, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Lab Nanotechnol Spect & Quantum Chem, Krasnoyarsk 660041, Russia.
RAS, SB, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.
Доп.точки доступа:
Gavrilyuk, A. P.; Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Ershov, A. E.; Ершов, Александр Евгеньевич; Karpov, S. V.; Карпов, Сергей Васильевич; Russian Foundation for Basic Research; government of the Krasnoyarsk territory and Krasnoyarsk Regional Fund of Science [18-42-243023]; RF Ministry of Science and Education,; State contract with Siberian Federal University for scientific research in 2017-2019; SB RAS Program [II.2P (0358-2015-0010)]
}
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8.
Physical principles of
the formation of a nanoparticle electric double layer in metal hydrosols / A. P. Gavrilyuk [et al.]> // Colloid Polym. Sci. - 2020. -
Vol. 298
,
Is. 1
. - P. 1-7,
DOI
10.1007/s00396-019-04573-8. - Cited References: 25. - The reported research was funded by the Russian Foundation for Basic Research and the government of the Krasnoyarsk territory, Krasnoyarsk Regional Fund of Science, grant No 18-42-243023, the RF Ministry of Education and Science, the State contract with Siberian Federal University for scientific research in 2017–2019. . - ISSN 0303-402X. - ISSN 1435-1536
Кл.слова (ненормированные):
Nanoparticle
--
Adsorption layer
--
Elastic deformation
--
Coagulation kinetics
--
Elasticity
modulus
Аннотация:
The Brownian dynamics method is employed to study the formation of an electrical double layer (EDL) on the metal nanoparticle (NP) surface in hydrosols during adsorption of electrolyte ions from the interparticle medium. Also studied is the charge accumulation by NPs in the Stern layer. To simulate the process of the formation of EDL, we took into account the effect of image forces and specific adsorption, dissipative and random forces, and the degree of hydration of adsorbed ions on the EDL structure. The employed model makes it possible to determine the charge of NPs and the structure of EDL. For the first time, the charge of both the diffuse part of EDL and the dense Stern layer has been determined. A decrease in the electrolyte concentration (below c ˂ 0.1 mol/l) has been found to result in dramatic changes in the formation of the Stern layer.
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Держатели документа:
Institute of Computational Modeling SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
L. V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian State University of Science and Technology, Krasnoyarsk, Russia
Доп.точки доступа:
Gavrilyuk, A. P.; Isaev, I. L.; Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Karpov, S. V.; Карпов, Сергей Васильевич
}
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9.
Feature of the
endohedral metallofullerene Y@C82 and Gd@C82 polymerization under high pressure / V. V. Zhukov, S. V. Erohin, V. D. Churkin [et al.]> // J. Phys. Chem. C. - 2022. -
Vol. 126
,
Is. 40
. - P. 17366-17373,
DOI
10.1021/acs.jpcc.2c05139. - Cited References: 35. - The authors gratefully acknowledge the financial support of the RFBR (project identifier: 18-29-19080). V.D.C. acknowledges the support of the RFBR (project identifier: 20-32-90038). M.Y.P. acknowledges the support of the Ministry of Science and Higher Education of the Russian Federation in the framework of the State Task (project code 0718-2020-0037) for Raman study, interpretation, and discussion of obtained results and Russian Science Foundation (project #20-12-00097) for investigation of fullerite mechanical properties. V.V.Z., S.V.E., and P.B.S. acknowledge the support of the Ministry of Science and Higher Education of the Russian Federation in the framework of the strategic academic leadership program “Priority 2030” (no. K6-2022-041). The calculations were performed at the supercomputer cluster provided by the Materials Modeling and Development Laboratory at NUST “MISIS” and the Joint Supercomputer Center of the Russian Academy of Sciences. The authors thank the staff of the Information Technology Department of the Moscow Institute of Physics and Technology and express their gratitude to the Data Center Group for their help in performing calculations . - ISSN 1932-7447
Кл.слова (ненормированные):
Fullerenes
--
Diamond anvil cell technique
--
Endohedral metallofullerenes
--
Experimental approaches
--
Fullerene cages
--
Gadolinia
--
High bulk
modulus
--
High pressure
--
Low pressures
--
Polymerized material
--
Theoretical approach
--
Polymerization
Аннотация:
In the present work, the polymerization of endohedral metallofullerenes (EMFs) with gadolinium (Gd@C82) and yttrium atoms (Y@C82) at high pressures achieved using the shear diamond anvil cell technique is studied using both theoretical and experimental approaches. It is found that in contrast to pure fullerenes, EMF polymerization starts at lower pressures with similar behavior for both metals inside the fullerene cage. EMF polymerization occurs smoothly and finally leads to a significant increase in the number of interfullerene bonds at pressures higher than ∼20 GPa. Finally, a high bulk
modulus
of both EMF-polymerized materials is obtained using Raman spectra.
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Держатели документа:
Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow, 108840, Russian Federation
National University of Science and Technology MISiS, Moscow, 119049, Russian Federation
Moscow Institute of Physics and Technology, Dolgoprudniy, Moscow, 141701, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, 119334, Russian Federation
Institute of Chemistry and Chemical Technology, The Siberian Branch of the RAS, Federal Research Center KSC Siberian Branch Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Zhukov, V. V.; Erohin, S. V.; Churkin, V. D.; Vnukova, N. G.; Внукова, Наталья Григорьевна; Antipina, L. Y.; Elesina, V. I.; Елесина, Виктория Игоревна; Visotin, M. A.; Высотин, Максим Александрович; Tomashevich, Y. V.; Popov, M. Y.; Churilov, G. N.; Чурилов, Григорий Николаевич; Sorokin, P. B.; Fedorov, A. S.; Федоров, Александр Семенович
}
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