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ZAMKOVA, N. G.
THERMODYNAMICS OF THE 2-DIMENSIONAL SUPEREXCHANGE MODEL OF MITSUI / N. G. ZAMKOVA, V. I. ZINENKO // Theor. Math. Phys. - 1989. - Vol. 79, Is. 2. - P. 530-536, DOI 10.1007/BF01016535. - Cited References: 14 . - ISSN 0040-5779

РУБ Physics, Multidisciplinary + Physics, Mathematical

WOS
Доп.точки доступа:
ZINENKO, V. I.; Зиненко, Виктор Иванович; Замкова, Наталья Геннадьевна
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Zinenko, V. I.
Thermodynamics of spin ice on an antiperovskite lattice in the cluster approximation / V. I. Zinenko // Phys. Solid State. - 2023. - Vol. 65, Is. 7. - P. 1203-1207, DOI 10.21883/PSS.2023.07.56415.63. - Cited References: 9 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
phase transitions -- magnetism -- competing interactions
Аннотация: Low-temperature thermodynamic properties of spin ice have been studied for compounds with the structure of antiperovskite containing rare-earth ions with the general chemical formula ReMeO (where Re - is a rare-earth element, Me - is a divalent metal). The calculations were carried out in the cluster approximation. The cases of undistorted and distorted ORe6 octahedron are discussed. In the case of an undistorted octahedron in the absence of an external magnetic field, the ground state of the system is infinitely degenerate. When an external magnetic field is applied, anomalies in the temperature dependences of heat capacity, entropy and magnetization are detected. In the case of a distorted octahedron and assuming that this distortion leads to the energy efficiency of two of the sixty-four configurations, it is obtained that there is a phase transition in the system of magnetic rare-earth ions.

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Публикация на русском языке Зиненко, Виктор Иванович. Термодинамика спинового льда на решетке антиперовскита в приближении кластеров [Текст] / В. И. Зиненко. - 5 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 7. - С. 1256-1260

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Зиненко, Виктор Иванович
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Zinenko, V. I.
Thermodynamics of spin ice in staggered and direct (along the [111] axis) fields in the cluster approximation / V. I. Zinenko, M. S. Pavlovskii // J. Exp. Theor. Phys. - 2017. - Vol. 124, Is. 2. - P. 295-303, DOI 10.1134/S1063776117020182. - Cited References:15. - This work was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territory Foundation for Supporting the Scientific and Research Activity (project no. 16-42-243039). . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
ENTROPY
HEAT
Аннотация: We have analyzed the low-temperature thermodynamic properties of spin ice in the staggered and direct (acting along the [111] axis) fields for rare-earth oxides with the chalcolamprite structure and general formula Re23+Me24+O72- . Calculations have been performed in the cluster approximation. The results have been compared with experimental temperature dependences of heat capacity and entropy for Dy2Ti2O7 compound for different values of the external field in the [111] direction. The experimental data and calculated results have also been compared for the Pr2Ru2O7 compound with the antiferromagnetic ordering of magnetic moments of ruthenium ions, which gives rise to the staggered field acting on the system of rare-earth ions. The calculated temperature dependences of heat capacity and entropy are in good agreement with experimental data.

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Публикация на русском языке Зиненко, Виктор Иванович. Термодинамика спинового льда в «шатающемся» и прямом в направлении [111] полях в приближении кластеров [Текст] / В. И. Зиненко, М. С. Павловский // Журн. эксперим. и теор. физ. : Наука, 2017. - Т. 151 Вып. 2. - С. 346–355

Доп.точки доступа:
Pavlovskii, M. S.; Павловский, Максим Сергеевич; Зиненко, Виктор Иванович; Russian Foundation for Basic Research; Government of the Krasnoyarsk Territory; Krasnoyarsk Territory Foundation for Supporting the Scientific and Research Activity [16-42-243039]
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Sadreev, A. F.
Thermodynamics of soliton configurations in a two-dimensional model for displacive phase-transition / A. F. Sadreev // Z. Phys. B-Condens. Mat. - 1988. - Vol. 73, Is. 1. - P. 115-124, DOI 10.1007/BF01312162. - Cited References: 32 . - ISSN 0722-3277

РУБ Physics, Condensed Matter

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Scopus
Держатели документа:
Institute of Physics, Krasnoyarsk, SU-660036, Russia
Доп.точки доступа:
Садреев, Алмаз Фаттахович
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Vaks, V. G.
Thermodynamics of six-vertex models in direct and staggered electric fields in the cluster approximation [Text] / V. G. Vaks, V. I. Zinenko // Journal of Physics C Solid State Physics. - 1986. - Vol. 19, Is. 17. - P. 3083-3104, DOI 10.1088/0022-3719/19/17/007 . - ISSN 0022-3719

РИНЦ,
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Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK 660036,USSR
I v Kurchatov Institute of Atomic Energy, Moscow, Russian Federation

Доп.точки доступа:
Zinenko, V. I.; Зиненко, Виктор Иванович
}
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Kuzmin, E. V.
Thermodynamics of quasi-2-dimensional heisenberg-ferromagnet with single-ion-anisotropy / E. V. Kuzmin, G. A. Petrakovskii // Fiz. Tverd. Tela. - 1986. - Vol. 28, Is. 11. - P. 3551-3553. - Cited References: 4 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Кузьмин, Евгений Всеволодович
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ZINENKO, V. I.
THERMODYNAMICS OF INTERACTING ISING AND MITSUI TYPE QUASI-ONE-DIMENSIONAL SYSTEMS / V. I. ZINENKO, N. G. TOMSHINA // Fiz. Tverd. Tela. - 1982. - Vol. 24, Is. 2. - P. 480-485. - Cited References: 20 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
TOMSHINA, N. G.
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Thermochemistry, structure, and optical properties of a new β-La2(SO4)3 polymorphic modification / S. A. Basova, M. S. Molokeev, A. S. Oreshonkov [et al.] // Inorganics. - 2023. - Vol. 11, Is. 11. - Ст. 434, DOI 10.3390/inorganics11110434. - Cited References: 58. - The work was partly carried out within the framework of the Strategic Academic Leadership Program “Priority-2030” for the Kazan Federal University and the state assignment of the Kirensky Institute of Physics. - We acknowledge Lisa-Marie Wagner (JLU Giessen) for help with X-ray powder diffractometry, and Svetlana Volkova and Irina Palamarchuk (UTMN) for help with IR- and UV-spectrometry. The use of equipment provided by the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged . - ISSN 2304-6740
Кл.слова (ненормированные):
rare earths -- lanthanum -- sulfate -- crystal chemistry -- thermodynamics -- chemical kinetics -- dielectrics
Аннотация: A new polymorphic modification of lanthanum sulfate was obtained by thermal dehydration of the respective nonahydrate. According to powder X-ray diffraction, it was established that β-La2(SO4)3 crystallized in the C2/c space group of the monoclinic system with the KTh2(PO4)3 structure type (a = 17.6923(9), b = 6.9102(4), c = 8.3990(5) Å, β = 100.321(3)°, and V = 1010.22(9) Å3). Temperature dependency studies of the unit cell parameters indicated almost zero expansion along the a direction in the temperature range of 300–450 K. Presumably, this occurred due to stretching of the [LaO9]n chains along the c direction, which occurred without a significant alteration in the layer thickness over the a direction. A systematic study of the formation and destruction processes of the lanthanum sulfates under heating was carried out. In particular, the decisive impact of the chemical composition and formation energy of compounds on the thermodynamic and kinetic parameters of the processes was established. DFT calculations showed β-La2(SO4)3 to be a dielectric material with a bandgap of more than 6.4 eV. The processing of β-La2(SO4)3 with the Kubelka–Munk function exhibited low values below 6.4 eV, which indicated a fundamental absorption edge above this energy that was consistent with LDA calculations. The Raman and infrared measurements of β-La2(SO4)3 were in accordance with the calculated spectra, indicating that the obtained crystal parameters represented a reliable structure.

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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen 625003, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, Tyumen State University, Tyumen 625003, Russia
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
School of Engineering and Construction, Siberian Federal University, Krasnoyarsk 660041, Russia
A.M. Butlerov Chemistry Institute, Kazan Federal University, Kazan 420008, Russia
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, 35392 Giessen, Germany
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk 660041, Russia
Departement of Science and Innovation, Northern Trans-Ural Agricultural University, Tyumen 625003, Russia
School of Natural Sciences, Tyumen State University, Tyumen 625003, Russia
Center for Materials Research (LaMa), Justus-Liebig-University Giessen, 35392 Giessen, Germany
Construction Institute, Industrial University of Tyumen, Tyumen 625000, Russia

Доп.точки доступа:
Basova, S. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Zhernakov, M. A.; Khritokhin, N. A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Sal’nikova, E. I.; Azarapin, N. O.; Shelpakova, N. A.; Muller-Buschbaum, K.; Denisenko, Yu. G.
}
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The novel method for determination of association constants of strong electrolytes ions using capillary electrophoresis technique [Text] / V. V. Sursyakova, S. N. Kalyakin [et al.] // XVII International Conference on Chemical Thermodynamics in Russia (RCCT-2009) : abstracts. - 2009. - Vol. 1. - P. 314

Доп.точки доступа:
Sursyakova, V.V.; Kalyakin, S.N.; Burmakina, G.V.; Rubaylo, A.I.; International Conference on Chemical Thermodynamics in Russia(17 ; 2009 ; 29 June-3 July ; Kazan)
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10.

Phase transitions in elpasolites (ordered perovskites) / I. N. Flerov [et al.] // Materials Science and Engineering R: Reports. - 1998. - Vol. 24, Is. 3. - P. 81-151. - Cited References: 174 . - ISSN 0927-796X

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
ELASTIC NEUTRON-DIFFRACTION
   MII = CO
   RAMAN-SCATTERING
   THERMODYNAMIC PROPERTIES
   CRYSTAL-STRUCTURE
   SINGLE-CRYSTALS
   RB2KMIIIF6 ELPASOLITES
   CUBIC PEROVSKITES
   TEMPERATURE FORM
   HIGH-RESOLUTION
Кл.слова (ненормированные):
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.

Scopus
Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Inst. Chim. Matiere Cond. B., Universite Bordeaux I, 33608, Pessac Cedex, France
Lab. de Phys.-Chim. Molec., Universite Bordeaux I, 33405, Talence Cedex, France

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Tressaud, A.; Grannec, J.; Couzi, M.
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