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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : ZINENKO V. I., TOMSHINA N. G.
Заглавие : THERMODYNAMICS OF INTERACTING ISING AND MITSUI TYPE QUASI-ONE-DIMENSIONAL SYSTEMS
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1982. - Vol. 24, Is. 2. - P480-485. - ISSN 0367-3294
Примечания : Cited References: 20
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Valkov V. V., Ovchinnikov S. G.
Заглавие : CONTRIBUTION OF MAGNON-MAGNON INTERACTION TO THERMODYNAMICS OF ANISOTROPIC FERROMAGNETS
Место публикации : Zhurnal Eksperimentalnoi Teor. Fiz.: MEZHDUNARODNAYA KNIGA, 1983. - Vol. 85, Is. 5. - P1666-1674. - ISSN 0044-4510
Примечания : Cited References: 19
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : VAKS V. G., ZINENKO V. I.
Заглавие : THERMODYNAMICS OF 6-VERTEX MODELS IN DIRECT AND STAGGERED ELECTRIC-FIELDS IN THE CLUSTER APPROXIMATION
Разночтения заглавия :авие SCOPUS: Thermodynamics of six-vertex models in direct and staggered electric fields in the cluster approximation
Место публикации : JOURNAL OF PHYSICS C-SOLID STATE PHYSICS: IOP PUBLISHING LTD, 1986. - Vol. 19, Is. 17. - P3083-3104. - ISSN 0022-3719, DOI 10.1088/0022-3719/19/17/007
Примечания : Cited References: 21
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmin E. V., Petrakovskii G. A.
Заглавие : Thermodynamics of quasi-2-dimensional heisenberg-ferromagnet with single-ion-anisotropy
Место публикации : Fiz. Tverd. Tela. - 1986. - Vol. 28, Is. 11. - P.3551-3553. - ISSN 0367-3294
Примечания : Cited References: 4
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sadreev A. F.
Заглавие : Thermodynamics of soliton configurations in a two-dimensional model for displacive phase-transition
Разночтения заглавия :авие SCOPUS: Thermodynamics of solition configurations in a two-dimensional model for displacive phase transition
Место публикации : Z. Phys. B-Condens. Mat. - 1988. - Vol. 73, Is. 1. - P.115-124. - ISSN 0722-3277, DOI 10.1007/BF01312162
Примечания : Cited References: 32
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : ZAMKOVA N. G., ZINENKO V. I.
Заглавие : THERMODYNAMICS OF THE 2-DIMENSIONAL SUPEREXCHANGE MODEL OF MITSUI
Место публикации : Theor. Math. Phys.: PLENUM PUBL CORP, 1989. - Vol. 79, Is. 2. - P530-536. - ISSN 0040-5779, DOI 10.1007/BF01016535
Примечания : Cited References: 14
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Flerov I. N., Gorev M. V., Aleksandrov K. S.
Заглавие : Effect of hydrostatic pressure on phase transitions in perovskite-like ferroelastics
Коллективы : Russian-Japanese symposium on ferroelectricity
Место публикации : Ferroelectrics: Proceedings of the 1994 5th Russian-Japanese Symposium on Ferroelectricity. Part 2 (of 2). - 1995. - Vol. 169, Is. 1. - P.199-205. - ISSN 0015-0193, DOI 10.1080/00150199508217330
Ключевые слова (''Своб.индексиров.''): crystals--hydrostatic pressure--mathematical models--perovskite--phase transitions--pressure effects--thermodynamics--perovskite like ferroelastics--ferroelectric materials
Аннотация: The analysis of hydrostatic pressure influence on ferroelastic phase transitions in three- and two-dimensional perovskite-like crystals is carried out. The nonlinear effects and the change of the dT0/dp sign are discussed on the ground of the thermodynamic theory. Simple model of rigid spheres is used to connect the T0 shift under pressure with the bonds stresses.
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Flerov I. N., Aleksandrov K. S., Tressaud A., Grannec J., Couzi M.
Заглавие : Phase transitions in elpasolites (ordered perovskites)
Место публикации : Materials Science and Engineering R: Reports. - 1998. - Vol. 24, Is. 3. - P.81-151. - ISSN 0927-796X
Примечания : Cited References: 174
Предметные рубрики: ELASTIC NEUTRON-DIFFRACTION
MII = CO
RAMAN-SCATTERING
THERMODYNAMIC PROPERTIES
CRYSTAL-STRUCTURE
SINGLE-CRYSTALS
RB2KMIIIF6 ELPASOLITES
CUBIC PEROVSKITES
TEMPERATURE FORM
HIGH-RESOLUTION
Ключевые слова (''Своб.индексиров.''): crystal atomic structure--crystal growth--crystal lattices--crystallization--crystallography--ferroelectricity--hydrostatic pressure--order disorder transitions--single crystals--thermodynamics--elpasolites--landau theory--perovskite
Аннотация: Many compounds with general chemical formula A2BB?X6 and with tolerance factor value t < 1 crystallize in the elpasolite (ordered perovskite) structure. Different preparative methods have been considered. For example, the Bridgman technique is the most suitable method of growing single crystals of halogenated elpasolites with monoatomic cations. Group-theory and symmetry analyses have allowed us to build a scheme of possible structural distortions connected with octahedral rotations and displacements of ions. Experimental observations have proven that ferroelastic phase transitions occurring most frequently in elpasolites are due to small octahedra tilts. Quantitative analysis allows the possibility of describing these transitions in the framework of the thermodynamic Landau theory. Hydrostatic pressure and the substitution of atoms in different crystallographic sites allow to change significantly the succession and the temperature of phase transitions. The hypothesis of bond stresses is able to predict the possible occurrence of a phase transition for a particular elpasolite and/or the role of the octahedra rotations in the transformation. The mechanism of phase transitions in elpasolites and related compounds has also been considered. One can assume that a displacive mechanism associated with a strong anharmonicity plays a large role in phase transitions occurring in compounds with monoatomic cations. On the other hand, for instance, in cryolites with ammonium cations, the transitions originate from an order-disorder phenomenon. В© 1998 Elsevier Science S.A. All rights reserved.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A. S., Ovchinnikov S. G.
Заглавие : Density and thermodynamics of hydrogen adsorbed inside narrow carbon nanotubes
Разночтения заглавия :авие SCOPUS: Density and Thermodynamics of Hydrogen Adsorbed Inside Narrow Carbon Nanotubes
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2004. - Vol. 46, Is. 3. - P584-589. - ISSN 1063-7834, DOI 10.1134/1.1687883
Примечания : Cited References: 21. - This study was supported by the federal program “Integration,” project no. Б0017
Предметные рубрики: MOLECULAR-DYNAMICS
TRANSITIONS
TRANSPORT
ENERGY
TUBES
Аннотация: A model is proposed for calculating the thermodynamic functions and the equilibrium density of a one-dimensional chain of molecules (atoms) adsorbed inside a narrow nanotube. The model considers both the interaction between introduced atoms (molecules) and their interaction with the nanotube walls. The quantum-mechanical effects resulting in discrete energy levels of a particle and in its smeared position between neighbors are taken into account. In calculating the free energy at a nonzero temperature, the phonon contribution and the particle transitions to excited levels are considered. The model is applied to calculate the thermodynamic parameters of adsorbed hydrogen molecules inside extremely narrow single-wall carbon nanotubes of the (3,3) and (6,0) type. It is shown that external pressure gives rise to a sequence of first-order phase transitions, which change the density of adsorbed hydrogen molecules. (C) 2004 MAIK "Nauka / Interperiodica".
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gekht R. S., Bondarenko I. N.
Заглавие : A quantum spin liquid in a two-layer triangular antiferromagnet
Место публикации : J. Exp. Theor. Phys.: AMER INST PHYSICS, 2005. - Vol. 101, Is. 5. - P868-880. - ISSN 1063-7761, DOI 10.1134/1.2149066
Примечания : Cited References: 43
Предметные рубрики: ONE-DIMENSIONAL ANTIFERROMAGNETS
DIMER GROUND-STATE
MEAN-FIELD THEORY
HEISENBERG-ANTIFERROMAGNET
SYSTEM SRCU2(BO3)(2)
PHASE-TRANSITION
GAP
FLUCTUATIONS
EXCITATIONS
LATTICE
Ключевые слова (''Своб.индексиров.''): antiferromagnetic materials--magnetic fields--magnetization--phase diagrams--spectrum analysis--thermodynamics--analogous systems--square lattices--thermodynamic quantities--two-layer triangular antiferromagnets--quantum theory
Аннотация: The possibility of implementing a quantum-spin-liquid-type state in a two-layer triangular spin-1/2 antiferromagnet at T = 0 is investigated. The ratio of intra- to interlayer exchange constants (j) is found under which a transition from the classical state with 120 degrees triangular order to a quantum state with zero magnetization per site occurs; in this case, the spins of adjacent layers form singlets that are separated from triplet excitations by an energy gap. Compared with an analogous system with the square lattice, the range of j in which the classical ordered state is realized turns out to be an order of magnitude smaller due to the effects of frustration; in this case, the behavior of thermodynamic quantities is analogous, on the whole, to that in two-layer square lattices; a difference manifests itself in the behavior of the gap in the spectrum of quasiparticles in an external magnetic field h. For small fields h, a j-h phase diagram is constructed that determines the domains in which the 120 degrees and the singlet phases exist. It is established that, in the neighborhood of the second-order phase transition, the contribution, to the thermodynamic quantities, of longitudinal spin fluctuations, which are disregarded in the spin-wave description, is comparable to the contribution of transverse fluctuations. (c) 2005 Pleiades Publishing, Inc.
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