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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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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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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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Valkov, V. V.
CONTRIBUTION OF MAGNON-MAGNON INTERACTION TO THERMODYNAMICS OF ANISOTROPIC FERROMAGNETS / V. V. VALKOV, S. G. OVCHINNIKOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1983. - Vol. 85, Is. 5. - P. 1666-1674. - Cited References: 19 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary

WOS
Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Val'kov, V. V.
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Val'kov, V. V.
Effect of intersite repulsion on the correlation functions and thermodynamics of an Ising chain with annealed magnetic disorder / V. V. Val’kov, M. S. Shustin // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 11. - P. 1335-1337, DOI 10.3103/S1062873816110290. - Cited References: 6. - This work was supported by the Russian Foundation for Basic Research, project nos. 13-02-00073, 14-02-31237, and 15-42-04372. . - ISSN 1062-8738
Кл.слова (ненормированные):
Chains -- Magnetic susceptibility -- Temperature distribution -- Thermodynamics -- Transfer matrix method -- Correlation function -- Equilibrium behavior -- Equilibrium distributions -- Non-magnetic impurities -- Quantum phase transitions -- Repulsion parameter -- Temperature dependence -- Transfer matrix technique -- Phase transitions
Аннотация: An exact solution for a model describing the equilibrium behavior of an ensemble of Ising chains with nonmagnetic intersite repulsion of nearest neighbors and an equilibrium distribution of nonmagnetic impurities is obtained using the transfer matrix technique. The possibility of exciting quantum phase transitions using the intersite repulsion parameter in a system is demonstrated. Proximity to the critical points of these transitions has a substantial effect on the temperature dependence of a system’s magnetic susceptibility. © 2016, Allerton Press, Inc.

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Публикация на русском языке Вальков, Валерий Владимирович. Влияние эффектов межузельного отталкивания на корреляционные функции и термодинамику изинговской цепочки с отожженным магнитным беспорядком [Текст] / В. В. Вальков, М. С. Шустин // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 11. - С. 1504-1506

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shustin, M. S.; Шустин, Максим Сергеевич; Вальков, Валерий Владимирович
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VAKS, V. G.
THERMODYNAMICS OF 6-VERTEX MODELS IN DIRECT AND STAGGERED ELECTRIC-FIELDS IN THE CLUSTER APPROXIMATION / 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. - Cited References: 21 . - ISSN 0022-3719

РУБ Physics, Condensed Matter

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Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK 660036,USSR
ИФ СО РАН
I v Kurchatov Institute of Atomic Energy, Moscow, Russian Federation
L v Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
ZINENKO, V. I.; Зиненко, Виктор Иванович
}
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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.

Sidorov, K. A.
Exact solution for the thermodynamics of the one-dimensional Hubbard model with infinite repulsion in a magnetic field / K. A. Sidorov, N. V. Tikhonov, S. G. Ovchinnikov // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P1.43. - P. 104. - References: 4 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
Hubbard model -- magnetic field -- infinite repulsion -- thermodynamics -- exact solution

Доп.точки доступа:
Tikhonov, N. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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