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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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One- and two-particle correlation functions in the cluster perturbation theory for cuprates / V. I. Kuz’min, S. V. Nikolaev, M. M. Korshunov, S. G. Ovchinnikov // Materials. - 2023. - Vol. 16, Is. 13. - Ст. 4640, DOI 10.3390/ma16134640. - Cited References: 63. - V.I.K. and S.V.N. acknowledge support from the Krasnoyarsk Regional Science Foundation and Russian Science Foundation, grant no. 22-22-20007. - We acknowledge useful discussions with E.I. Shneyder . - ISSN 1996-1944
Кл.слова (ненормированные):
strong electronic correlations -- cuprates -- Hubbard model -- cluster perturbation theory
Аннотация: The physics of high-Tc superconducting cuprates is obscured by the effect of strong electronic correlations. One way to overcome this problem is to seek an exact solution at least within a small cluster and expand it to the whole crystal. Such an approach is at the heart of cluster perturbation theory (CPT). Here, we developed CPT for the dynamic spin and charge susceptibilities (spin-CPT and charge-CPT), with the correlation effects explicitly taken into account by the exact diagonalization. We applied spin-CPT and charge-CPT to the effective two-band Hubbard model for the cuprates obtained from the three-band Emery model and calculated one- and two-particle correlation functions, namely, a spectral function and spin and charge susceptibilities. The doping dependence of the spin susceptibility was studied within spin-CPT and CPT-RPA, that is, the CPT generalization of the random phase approximation (RPA). In the underdoped region, both our methods resulted in the signatures of the upper branch of the spin excitation dispersion with the lowest excitation energy at the (π,π) wave vector and no presence of low-energy incommensurate excitations. In the high doping region, both methods produced a low energy response at four incommensurate wave vectors in qualitative agreement with the results of the inelastic neutron scattering experiments on overdoped cuprates.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia
Siberian Federal University, Svobodny Prospect 79, 660041 Krasnoyarsk, Russia

Доп.точки доступа:
Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Nikolaev, S. V.; Николаев, Сергей Викторович; Korshunov, M. M.; Коршунов, Максим Михайлович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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    Zero-Dimensional Organic Copper(I) Iodide Hybrid with High Anti-Water Stability for Blue-Light-Excitable Solid-State Lighting / B. Su, J. Jin, Y. Peng [et al.] // Adv. Opt. Mater. - 2022. - Vol. 10, Is. 12. - Ст. 2102619, DOI 10.1002/adom.202102619. - Cited References: 55. - This work was supported by the National Natural Science Foundation of China (Nos.: 51961145101 and 51972118), Guangzhou Science & Technology Project (202007020005), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01×137). This work was also funded by RFBR according to the research Project No.19-52-80003 . - ISSN 2195-1071
   Перевод заглавия: Нульмерный металлорганический гибрид йодида меди(I) с высокой водостойкостью для ламп, возбуждаемых синим светом
Кл.слова (ненормированные):
anti-water stability -- copper(I) iodide cluster -- light-emitting diodes -- photoluminescence -- zero-dimensional metal halides
Аннотация: The discovery of rare-earth free luminescent materials with blue-light-excitable characteristic is of great importance for solid-sate lighting applications. Herein, a Cu(I)-based 0D luminescent hybrid (1,3-dppH2)2Cu4I8∙H2O is synthesized by a facile solution method, and it shows the orange-red emission peaking at 625 nm upon 460 nm excitation. The structure-related luminescence mechanism has been elaborated by experimental and theoretical investigations. Moreover, the emission intensity remains unchanged even after continuous water treatment for 60 days due to the improved structural stability originating from intermolecular π–π interaction between organic cations. A warm white light-emitting diode (LED) device with the color rendering index of 91.4% has been fabricated by combining the 440 nm LED chip, green-emitting Lu3Al5O12:Ce3+, and (1,3-dppH2)2Cu4I8∙H2O. This work provides a new design route towards 0D cuprous halide materials and will initiate more exploration of their intrinsic luminescence mechanism.

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Держатели документа:
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Engineering Physics and Radioelectronic, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation

Доп.точки доступа:
Su, B.; Jin, J.; Peng, Y.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yang, X.; Xia, Z.
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    Zobov, V. E.
    Effect of degradation processes caused by a small perturbation on the growth of the average cluster size of correlated spins in multiple quantum NMR spectroscopy of solids / V. E. Zobov, A. A. Lundin // Appl. Magn. Reson. - 2021. - Vol. 52. Is. 7. - P. 879–892, DOI 10.1007/s00723-021-01342-1. - Cited References: 33. - The study is funded by the Ministry of Science and Higher Education of the Russian Federation in the framework of the State assignment, State registration number AAAA-A19-119012890064-7 . - ISSN 0937-9347
   Перевод заглавия: Влияние процессов деградации, вызванных малым возмущением, на рост среднего размера кластера коррелированных спинов в многоквантовой ЯМР спектроскопии твердых тел
Кл.слова (ненормированные):
Nuclear magnetic resonance spectroscopy -- Average size -- Cluster sizes -- Degradation process -- Multiple quantum NMR spectroscopy -- Orthogonal operators -- Over-complete -- Small perturbations -- Velocity ratio -- Cluster analysis
Аннотация: Multiple quantum (MQ) NMR spectroscopy of solids allows one to observe the growth and decay of multispin correlations. As a rule, the average size of the cluster of correlated spins is extracted from the width of the MQ spectrum. In the present article, the size distribution of such clusters is explored. To obtain the above distribution, the solutions for the amplitudes of the decomposition over complete sets of orthogonal operators for the two different models were used. By means of these models, we have taken into account the dependence of cluster degradation (the degradation of a cluster means, e.g., destruction of correlations in cluster or loss of particles in it) through two positions. The first one defines by the cluster size while the second one depends on the MQ coherence order of the cluster. It is shown that in dependence of the relation the rates of these degradation processes, the width of the MQ spectrum carries different information. If the first process is faster that the second one, then the width of the MQ spectrum is still determined by the average cluster size. When the velocity ratio becomes inverse, the width of the MQ spectrum takes on a smaller value, which is a consequence of the faster degradation of the MQ spectrum components with large orders of coherence.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 117977, Russian Federation

Доп.точки доступа:
Lundin, A. A.; Зобов, Владимир Евгеньевич
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Raman scattering study of the rare-earth binary ferroborate Nd0.75Dy0.25Fe3(BO3)4 single crystal / A. Y. Glamazda, V. P. Gnezdilov, P. Lemmens [et al.] // Low Temp. Phys. - 2021. - Vol. 47, Is. 12. - P. 1011-1021, DOI 10.1063/10.0007074. - Cited References: 25. - A. Yu. Glamazda thanks Dr. A. V. Peschanskii for fruitful discussions. P. Lemmens acknowledges funding by the DFG Excellence Cluster Quantum Frontiers, EXC 2123-390837967, DFG Le967/16-1, and DFG-RTG 1952/1 . - ISSN 1063-777X. - ISSN 1090-6517

РУБ Physics, Applied
Рубрики:
MAGNETIC PHASE-TRANSITIONS
SPIN REORIENTATION
Аннотация: We report comprehensive Raman scattering measurements on a single crystal of binary ferroborate Nd0.75Dy0.25Fe3(BO3)4 in the temperature range of 7–295 K with 532 nm (18797 cm−1) laser excitation. The performed analysis of the polarized Raman spectra revealed the bands assigned to phonon, magnetic, and electronic excitations. The temperature evolution of these quasiparticle excitations has allowed us to ascertain the intricate coupling and interplay between lattice, magnetic, and electronic degrees of freedom. Analysis of the measured Raman spectra made it possible to identify all A1 and E phonon modes predicted by the group-theoretical analysis. The splitting energies between the LO and TO components of the polar E phonons were determined. Below the magnetic ordering temperature of the Fe sublattice, TN, we have revealed a multiple peaked two-magnon excitation. Analyzing the temperature evolution of low-frequency modes in the spectra, we also identified modes that are associated with electronic transitions between the crystal field levels of the Nd3+ ions with ground-state 4I9/2 and of the Dy3+ ions with ground-state 6H15/2 multiplets. In addition to the already known temperatures of magnetic transitions, analysis of the temperature behavior of low-frequency phonon and electronic excitations made it possible to establish a temperature T* = 100 K, presumably associated with local distortions of the crystal lattice. The presence of this temperature is confirmed by our ultrasonic study. A group of intense bands observed in the frequency range 1700–2200 cm−1 has been associated with the mixed low-lying electronic Raman transitions 4I9/2→4I11/2 and the high-energy luminescence ones 4G5/2+2G7/2→4I9/2 for the Nd3+ ion.

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Публикация "на русском языке" Raman scattering study of the rare-earth binary ferroborate Nd0.75Dy0.25Fe3(BO3)4 single crystal [Текст] / A. Yu. Glamazda, V. P. Gnezdilov, P. Lemmens [et al.] // Физ. низких температур. - 2021. - Т. 47 Вып. 12.- С.1107-1118 ; Fiz. Nizk. Temp.

Держатели документа:
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkiv, Ukraine.
Kharkov Natl Univ, UA-61022 Kharkiv, Ukraine.
TU Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany.
TU Braunschweig, Lab Emerging Nanometrol, D-38106 Braunschweig, Germany.
TU Braunschweig, Int Grad Sch Metrol, D-38106 Braunschweig, Germany.
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Glamazda, A. Yu.; Gnezdilov, V. P.; Lemmens, P.; Zvyagina, G. A.; Gudim, I. A.; Гудим, Ирина Анатольевна; DFG Excellence Cluster Quantum FrontiersGerman Research Foundation (DFG) [EXC 2123-390837967, DFG Le967/16-1, DFG-RTG 1952/1]
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Nikolaev, S. V.
Electronic Structure and Conductivity of a Disordered A1–xBx Binary Alloy in the Cluster Approach for the Hubbard Model / S. V. Nikolaev, Y. S. Orlov, V. A. Dudnikov // J. Exp. Theor. Phys. - 2020. - Vol. 131, Is. 5. - P. 823-837, DOI 10.1134/S1063776120100131. - Cited References: 27. - This study was supported by the Foundation “Basis” for development of theoretical physics and mathematics, Russian Foundation for Basic Research (project no. 19-03-00017), Government of Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science according to the research project “Electronic correlation effects and multiorbital physics in iron-based materials and cuprates” (no. 19-42-240007) and research project “Features of electron-phonon coupling in high-temperature superconductors with strong electronic correlations” (no. 18-42-240017) . - ISSN 1063-7761
Кл.слова (ненормированные):
Electronic structure -- Hubbard model -- Boltzmann -- Cluster approach -- Disordered system -- Electrical conductivity -- Electronic band structure -- Linear-response theory -- Strong electron correlations -- Binary alloys
Аннотация: We propose a method for calculating the electronic band structure of disordered systems with strong electron correlations. Various approaches to the description of electrical conductivity of disordered systems are considered. Calculations are based on determining the one-particle Green function of the system, which is averaged over different configurations of a cluster, on the Boltzmann formalism, and the Kubo linear response theory. As the basic model, we use the Hubbard model for an A –xBx binary alloy.

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Публикация на русском языке Николаев, Сергей Викторович. Электронная структура и электропроводность неупорядоченного бинарного сплава A1-xBx в рамках кластерного подхода для модели Хаббарда [Текст] / С. В. Николаев, Ю. С. Орлов, В. А. Дудников // Журн. эксперим. и теор. физ. - 2020. - Т. 158 Вып. 5. - С. 946-961

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,” Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Николаев, Сергей Викторович
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Anomalous spectral properties of strongly correlated systems within the cluster perturbation theory / V. I. Kuz'min, S. V. Nikolaev, S. G. Ovchinnikov // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст. I.P9. - P. 151-152. - Cited References: 4. - The reported study was funded by Russian Foundation for Basic Research (RFBR) according to the research project no. 18-32-00256, RFBR and Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: “18-42-240017 Features of electron-phonon coupling in high-temperature superconductors with strong electron correlations” and the research project: “18-42-243004 New thermoelectric materials based on multi-scale spatially inhomogeneous substituted rare-earth cobalt oxides and the Ruddlesden-Popper phases” . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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    Phytogenic Synthesis of Ag Bionano-Antibiotics Against ESKAPE Drug Resistant Communities in Krasnoyarsk, Siberia / B. Syed [et al.] // J. Cluster Sci. - 2019. - Vol. 30, Is. 3. - P. 589-597, DOI 10.1007/s10876-019-01518-7. - Cited References: 44. - uthors are thankful for facilities provided by Siberian Federal University to carry out the present study. Authors are grateful to Krasnoyarsk Medical University for providing opportunity to carry out the present study. . - ISSN 1040-7278
   Перевод заглавия: Фитогенный синтез биологических нано-антибиотиков на основе серебра против фармакорезистентных болезнетворных микроорганизмов, распространенных в Красноярске, Россия
Кл.слова (ненормированные):
Heracleum dissectum -- Silver nano-antibiotics -- ESKAPE -- Antimicrobial-resistant -- Krasnoyarsk -- Siberia
Аннотация: The present study reports synthesis of silver nano-antibiotics from aqueous extract of H. dissectum. The nano-antibiotics were characterized using UV–visible spectra which displayed maximum absorbance at 430 nm. The role of phytocomponents as reducing agent and stabilization of silver nano-antibiotics was depicted with Fourier-transform infrared spectroscopy which revealed presence of hydroxyl and carboxyl groups associated with silver nano-antibiotics. The crystalline nature was studied with X-ray diffraction which showed Bragg’s intensities at 2θ angle which denoted (101), (111), (200), (220), (311) planes. The morphological characteristics were studied using Transmission Electron Microscopy to reveal the size ranging from 5 to 50 nm. The bactericidal activity of nano-antibiotics was studied via well diffusion and minimal inhibitory concentration assay against members of drug-resistant communities bearing resistant to more than ten standard antibiotics. Nano-antibiotics displayed highest activity against Ps. aeruginosa strain 55 and Methicillin-resistant Staphylococcus aureus with 16 mm zone of inhibition followed by Kl. pneumoniae strain 104 and E. coli strain 55. Moderate activity was observed against Ac. baumannii strains with 12 mm zone of inhibition. The obtained results envision the role of plant mediated nano-antibiotics as one of the best suited alternatives towards combating drug resistant pathogens.

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Department of Microbiology, Krasnoyasrk State Medical University named after Prof. VF. Voino-Yasenetskiy, Partizana-Zheleznyaka Street, 1, Krasnoyarsk, 660022, Russian Federation
Siberian Federal University, Svobodnyy pr., 79, Krasnoyarsk, 660041, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russian Federation
Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Akademgorodok 50, Bld. 38, Krasnoyarsk, 660036, Russian Federation
School of Petroleum and Natural Gas Engineering, Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Environmental Sciences, Jozef Stefan Institute, Jamova 39, Ljubljana, 1000, Slovenia
Department of Biotechnology, M. M. Engineering College, Maharishi Markandeshwar University (MMU), Mullana, Ambala, India

Доп.точки доступа:
Syed, B.; Prudnikova, S. V.; Perianova, O. V.; Zharkov, S. M.; Жарков, Сергей Михайлович; Kuzmin, A.; Chouhan, R. S.; Potkina, N. K.; Khohlova, O. Y.; Lobova, T. I.; Singh, M.
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10.

Kuz'min, V. I.
Effect of short-range correlations on spectral properties of doped Mott insulators / V. Kuz’min, S. Nikolaev, S. Ovchinnikov // J. Supercond. Novel Magn. - 2019. - Vol. 32, Is. 7. - P. 1909-1919, DOI 10.1007/s10948-018-4927-x. - Cited References: 81. - The reported study was funded by RFBR according to the research project no. 18-32-00256 (all the results except correlation functions calculated using 4 × 4 clusters). The study also was funded by the Presidium RAS program no. 12 “Fundamental problems of high temperature superconductivity” (research project 0356-2018-0063); “BASIS” Foundation for Development of Theoretical Physics and Mathematics; RFBR according to the research project no. 16-02-00098; RFBR and Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, the research project: “18-42-240017 Features of electron-phonon coupling in high-temperature superconductors with strong electron correlations” and the research project 18-42-243004. . - ISSN 1557-1939
Кл.слова (ненормированные):
The Hubbard model -- The Hubbard-Holstein model -- HTSC -- Cluster perturbation theories -- Fermi surface -- Spectral properties
Аннотация: In the framework of the cluster perturbation theory for the 2D Hubbard and Hubbard-Holstein models at low hole doping, we have studied the effect of local and short-range correlations in strongly correlated systems on the anomalous features in the electronic spectrum by investigating the fine structure of quasiparticle bands. Different anomalous features of spectrum are obtained as the result of intrinsic properties of strongly correlated electron and polaron bands in the presence of short-range correlations. Particularly, features similar to the electron-like Fermi-pockets of cuprates at hole doping p ∼ 0.1 are obtained without ad hoc introducing a charge density wave order parameter within the Hubbard model in a unified manner with other known peculiarities of the pseudogap phase like Fermi-arcs, pockets, waterfalls, and kink-like features. The Fermi surface is mainly formed by dispersive quasiparticle bands with large spectral weight, formed by coherent low-energy exications. Within the Hubbard-Holstein model at moderate phonon frequencies, we show that modest values of local electron-phonon interaction are capable of introducing low-energy kink-like features and affecting the Fermi surface by hybridization of the fermionic quasiparticle bands with the Franck-Condon resonances.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Кузьмин, Валерий Ипполитович
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11.

Magnon-polaron excitations in the noncollinear antiferromagnet Mn3Ge / A. S. Sukhanov [et al.] // Phys. Rev. B. - 2019. - Vol. 99, Is. 21. - Ст. 214445, DOI 10.1103/PhysRevB.99.214445. - Cited References: 53. - We thank S. E. Nikitin for many stimulating discussions. A.S.S. acknowledges support from the International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM). Work at the TU Dresden was funded by the German Research Foundation (DFG) through projects B05 and C03 of the Collaborative Research Center SFB 1143 (project i.d. 247310070), Wurzburg-Dresden Cluster of Excellence ct.qmat (EXC 2147; project i.d. 39085490), and Priority Program SPP 2137 "Skyrmionics." . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics,
Рубрики:
TRIANGULAR SPIN CONFIGURATION
WEAK FERROMAGNETISM
MN3SN
Аннотация: We present detailed inelastic neutron scattering measurements of the noncollinear antiferromagnet Mn3Ge. Time-of-flight and triple-axis spectroscopy experiments were conducted at the temperature of 6 K, well below the high magnetic ordering temperature of 370 K. The magnetic excitations have a 5-meV gap and display an anisotropic dispersive mode reaching ~ 90 meV at the boundaries of the magnetic Brillouin zone. The spectrum at the zone center shows two additional excitations that demonstrate characteristics of both magnons and phonons. Ab initio lattice-dynamics calculations show that these can be associated with the magnon-polaron modes resulting from the hybridization of the spin fluctuations and the low-energy optical phonons. The observed magnetoelastic coupling agrees with the previously found negative thermal expansion in this compound and resembles the features reported in the spectroscopic studies of other antiferromagnets with similar noncollinear spin structures.

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Держатели документа:
Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01069 Dresden, Germany.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Univ Paris Saclay, CEA Saclay, CNRS, Lab Leon Brillouin,CEA, F-91191 Gif Sur Yvette, France.
Rutherford Appleton Lab, STFC, ISIS Facil, Didcot OX11 0QX, Oxon, England.

Доп.точки доступа:
Sukhanov, A. S.; Pavlovskii, M. S.; Павловский, Максим Сергеевич; Bourges, P.h.; Walker, H. C.; Manna, K.; Felser, C.; Inosov, D. S.; International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM); German Research Foundation (DFG) through project B05 of the Collaborative Research Center [SFB 1143, 247310070]; German Research Foundation (DFG) through project C03 of the Collaborative Research Center [SFB 1143, 247310070]; German Research Foundation (DFG) through Wurzburg-Dresden Cluster of Excellence ct.qmat [EXC 2147, 39085490]; German Research Foundation (DFG) [SPP 2137]
}
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12.

Temperature-dependent magnetization reversal in exchange bias NiFe/IrMn/NiFe structures / C. Gritsenko [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 482. - P. 370-375, DOI 10.1016/j.jmmm.2019.03.044. - Cited References: 55. - Ch. G. and M. G. acknowledge financial support by the Russian Foundation for Basic Research (RFBR grant. 17-32-50170). Ch. G. acknowledges the 5 top 100 Russian Academic Excellence Project at the Immanuel Kant Baltic Federal University. O.A.T. acknowledges support by the Grants-in-Aid for Scientific Research (Grant Nos. 17 K05511 and 17H05173) from MEXT, Japan, by the grant of the Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University, by JSPS and RFBR under the Japan-Russian Research Cooperative Program. V.R. acknowledges the Ministry of Education and Science of the Russian Federation in the framework of government assignment 3.9002.2017/6.7. Electron microscopy examination was carried out at the Center for Collective Use of the Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences. We also thank Montserrat Rivas for helpful discussions. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
COERCIVITY
   FILM
   ROUGHNESS
   THICKNESS
   HEADS
   IRMN
Кл.слова (ненормированные):
Magnetization reversal -- Exchange bias -- Permalloy
Аннотация: We demonstrate magnetization reversal features in NiFe/IrMn/NiFe thin-film structures with 40% and 75% relative content of Ni in Permalloy in the temperature range from 80 K to 300 K. The magnetization reversal sequence of the two ferromagnetic layers is found to depend on the type of NiFe alloy. In the samples with 75% relative content of Ni, the bottom ferromagnetic layer reverses prior to the top one. On the contrary, in the samples with 40% of Ni, the top ferromagnetic layer reverses prior to the bottom one. These tendencies of magnetization reversal are preserved in the entire range of temperatures. These distinctions can be explained by the morphological and structural differences of interfaces in the samples based on two types of Permalloy.

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Держатели документа:
Immanuel Kant Baltic Fed Univ, A Nevskogo 14, Kaliningrad 236041, Russia.
Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Leninskie Gory 1, Moscow 119991, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akad Gorodok 50-38, Krasnoyarsk 660036, Russia.
Natl Univ Sci & Technol MISiS, Leninsky Prospect 4, Moscow 119049, Russia.
Lomonosov Moscow State Univ, Fac Phys, Leninskie Gory 1-2, Moscow 119991, Russia.
Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia.
Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
Tohoku Univ, Ctr Sci & Innovat Spintron, Sendai, Miyagi 9808577, Japan.

Доп.точки доступа:
Gritsenko, C.h.; Dzhun, I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Gorshenkov, M.; Babaytsev, G.; Chechenin, N.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Tretiakov, Oleg A.; Rodionova, V.; Russian Foundation for Basic Research (RFBR) [17-32-50170]; MEXT, Japan [17 K05511, 17H05173]; Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University; JSPS; RFBR under the Japan-Russian Research Cooperative Program; Ministry of Education and Science of the Russian Federation [3.9002.2017/6.7]
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13.

Structure of a trinuclear μ3-vinylidene cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6 / O. S. Chudin [et al.] // J. Struct. Chem. - 2017. - Vol. 58, Is. 3. - P. 600-602, DOI 10.1134/S0022476617030234. - Cited References: 15 . - ISSN 0022-4766
Кл.слова (ненормированные):
heterometallic clusters -- iron -- manganese -- platinum -- single crystal X-ray diffraction analysis -- vinylidene complexes
Аннотация: The single crystal X-ray diffraction study of the heterometallic cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6 is performed. The crystallographic characteristics are as follows: a = 32.356(15) Å, b = 11.754(5) Å, c = 20.114(9) Å, β = 115.707(6)°, V = 6893(5) Å3, space group C2/c, Z = 8, dcalc = 1.741 g/cm3. The cluster molecule contains a bridging phenylvinylidene ligand coordinated to a metallic core in the form of a Mn–Fe–Pt chain (the Mn–Fe and Fe–Pt bond lengths are 2.6768(14) Å and 2.6280(11) Å respectively and the Mn⋯Pt distance is 3.6425(19) Å).

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Публикация на русском языке Структура трехъядерного μ3-винилиденового кластера CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6 [Текст] / О. С. Чудин [и др.] // Журн. структ. химии. - 2017. - Т. 58 № 3. - С. 628-630

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

Доп.точки доступа:
Chudin, O. S.; Verpekin, V. V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Rubaylo, A. I.
}
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14.

Ovchinnikov, S. G.
Multiphonon contribution to the polaron formation in cuprates with strong electron correlations and strong electron-phonon interaction / S. G. Ovchinnikov, I. A. Makarov, P. A. Kozlov // Proceedings of SPIE - The International Society for Optical Engineering : SPIE, 2017. - Vol. 10105, DOI 10.1117/12.2266799. - Cited References: 17. - Authors are thankful to Russian Science Foundation (project No. 14-12-00061) for financial support.
Кл.слова (ненормированные):
High-temperature superconductivity -- Cuprates -- Strong electronic correlations -- Cluster form of perturbation theory -- Hubbard operator -- Three-band p-d model -- Electron-phonon interaction -- Polaron -- Franck-Condon broadening
Аннотация: In this work dependences of the electron band structure and spectral function in the HTSC cuprates on magnitude of electron-phonon interaction (EPI) and temperature are investigated. We use three-band p-d model with diagonal and offdiagonal EPI with breathing and buckling phonon mode in the frameworks of polaronic version of the generalized tight binding (GTB) method. The polaronic quasiparticle excitation in the system with EPI within this approach is formed by a hybridization of the local multiphonon Franck-Condon excitations with lower and upper Hubbard bands. Increasing EPI leads to transfer of spectral weight to high-energy multiphonon excitations and broadening of the spectral function. Temperature effects are taken into account by occupation numbers of local excited polaronic states and variations in the magnitude of spin-spin correlation functions. Increasing the temperature results in band structure reconstruction, spectral weight redistribution, broadening of the spectral function peak at the top of the valence band and the decreasing of the peak intensity. The effect of EPI with two phonon modes on the polaron spectral function is discussed. © 2017 SPIE.

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Доп.точки доступа:
Makarov, I. A.; Макаров, Илья Анатольевич; Kozlov, P. A.; Козлов, Пётр Александрович; Овчинников, Сергей Геннадьевич; Oxide-Based Materials and Devices(8 ; 2017 ; 29 Jan. - 1 Feb.)
}
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15.

Orlov, Yu. S.
Polaron model of a pseudogap state in quasi-one-dimensional systems / Y. S. Orlov, V. A. Dudnikov // J. Exp. Theor. Phys. - 2017. - Vol. 125, Is. 5. - P. 798-809, DOI 10.1134/S1063776117110103. - Cited References: 57. - This work was supported by the Russian Foundation for Basic Research (project nos. 17-02-00826, 16-02-00507, 16-02-00098, and 16-02-00273), by the Government of the Krasnoyarsk krai, by the Kras-noyarsk Regional Foundation for Supporting Scientific and Technological Activity (project nos. 16-42-243048, 16-42-240746, and 16-43-240505)), and by the Grants Council of the President of the Russian Federation (project nos. SP-1844.2016.1 and NSh-7559.2016.2). . - ISSN 1063-7761
Кл.слова (ненормированные):
Basic concepts -- Cluster perturbation theories -- Polaron models -- Pseudogap state -- Quasi-one dimensional -- Quasi-one-dimensional systems
Аннотация: A brief overview of the basic concepts and problems of the physics of quasi-one-dimensional (q1D) compounds is given. A consistent theoretical description of the nature of the so-called pseudogap state still remains the main problem. A simplified model of the pseudogap state based on the formation of smallradius polarons is considered within the cluster perturbation theory.

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Публикация на русском языке Орлов, Юрий Сергеевич. Поляронная модель псевдощелевого состояния в квазиодномерных системах [Текст] / Ю. С. Орлов, В. А. Дудников // Журн. эксперим. и теор. физ. - 2017. - Т. 152 Вып. 5. - С. 944-956

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Орлов, Юрий Сергеевич
}
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16.

Komogortsev, S. V.
Fractal cluster of magnetic nanoparticles: dimensionality effect to magnetization curves / S. V. Komogortsev, V. A. Felk, R. S. Iskhakov // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 5OR-O-4. - P. 1003

РИНЦ,
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Доп.точки доступа:
Felk, V. A.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Комогорцев, Сергей Викторович; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
Нет сведений об экземплярах (Источник в БД не найден)
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17.

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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18.

Kudashkin, K.
Spectral properties of the Bose-Hubbard model within the cluster perturbation theory in X-operators representation / K. Kudashkin, S. Nikolaev, S. Ovchinnikov // J. Supercond. Nov. Magn. - 2017. - Vol. 30, Is. 1. - P. 103-107, DOI 10.1007/s10948-016-3781-y. - Cited References:16. - This work was supported by RFBR grant 16-02-00098, Government of Krasnoyarsk Territory and RFBR according to the research projects 16-42-243048, 16-42-240511, and 16-42-240769, and the Russian President Grant NSh-7559.2016.2. . - ISSN 1557-1939. - ISSN 1557-1947

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
TRANSITION
   SUPERFLUID
   INSULATOR
   ATOMS
Кл.слова (ненормированные):
Bose-Hubbard model -- Ultracold gases -- Cluster perturbation theory -- Density of states -- Spectral properties
Аннотация: We study the two-dimensional ultracold Bose gas in optical lattice. We use cluster perturbation theory based on Hubbard X-operators to calculate the spectral function and phase diagram of Bose-Hubbard model which is minimal model to describe behavior of ultracold gases in optical lattices. We have analyzed spectral properties of spinless bosons in a square lattice taking into account the short-range correlation.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; RFBR [16-02-00098, 16-42-243048, 16-42-240511, 16-42-240769]; Government of Krasnoyarsk Territory; Russian President Grant [NSh-7559.2016.2]
}
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19.

Nikolaev, S.
Electronic structure and Fermi surface within the cluster perturbation theory in X-operators representation : Invited / S. Nikolaev, V. I. Kuz'min, S. G. Ovchinnikov // International workshop on actual problems of condensed matter physics : Program. Book of abstracts / Fed. Res. Center KSC SB RAS, Kirensky Inst. of phys., Sib. Fed. Univ. - Krasnoyarsk, 2017. - P,. 27

Материалы совещания

Доп.точки доступа:
Ovchinnikov, S. G. \предс. прогр. ком.\; Овчинников, Сергей Геннадьевич; Kuz'min, V. I.; Ovchinnikov, S. G.; Federal Research Center KSC SB RAS; Kirensky Institute of Physics; Siberian Federal Univercity; International Workshop on Actual Problems of Condensed Matter Physics(27 Mar. - 1 Apr. 2017 ; Krasnoyarsk / Cheremushki)
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20.

    International workshop on actual problems of condensed matter physics : Program. Book of abstracts / Fed. Res. Center KSC SB RAS, Kirensky Inst. of phys., Sib. Fed. Univ. ; предс. прогр. ком. S. G. Ovchinnikov. - Krasnoyarsk : [s. n.], 2017. - 30 p.
    Содержание:
Bondarev, I. A. Magnetic and transport properties of the epitaxial Fe3Si film on a Si substrate / I. A. Bondarev. - P .25
Yakovlev, I. A. The magnetic anisotropy of the Fe and Fe(1-x)Si(x) thin films depend on / I. A. Yakovlev [и др.]. - P .12
Другие авторы: Belyaev B. A., Rautskii M. V., Tarasov, I. A., Varnakov S. N, Ovchinnikov, S. G.
Popkov, S. I. Inverted opals as the Josephson networks of weak links : Invited / S. I. Popkov [и др.]. - P .24
Другие авторы: Gokhfeld D. M., Bykov A., Mistonov A., Shabanov A., Terentiev K.
Nikolaev, S. Electronic structure and Fermi surface within the cluster perturbation theory in X-operators representation : Invited / S. Nikolaev, V. I. Kuz'min, S. G. Ovchinnikov. - P .27
Fedorov, A. S. DFT investigation of electronic and optical magnetic properties of one dimensional transition metal halide structuresTmHaI3 : Invited / A. S. Fedorov [и др.]. - P .20
Другие авторы: Kuzubov A. A., Kovaleva E. A., Popova M. I., Kholtobina A. S., Mikhaleva N. S., Visotin M. A.
Ovchinnikov, S. G. Effect of interatomic exchange interaction on spin crossover and Mott-Hubbard transition under high pressure and the physical properties of the low Earth’s mantle : Invited / S. G. Ovchinnikov [и др.]. - P .26
Другие авторы: Orlov Yu. S., Nikolaev S., Nesterov A., Ovchinnikova T.
Tarasov, I. A. Extremely high magnetic-field sensitivity of charge transport in the Mn/SiO2/p-Si hybrid structure / I. A. Tarasov [и др.]. - P .21
Другие авторы: Smolyakov D. A., Rautskii M. V., Lukyanenko A. V., Yakovlev I. A., Ovchinnikov S. G., Volkov N. V.
Volkov, N. V. Marnetic-field sensitivity of charge transport in silicon-based hybrid structures : Invited / N. V. Volkov [et al.]. - P .10
Другие авторы: Tarasov A. S., Rautskii M. V., Lukyanenko A. V., Varnakov S. N., Bondarev I. A., Ovchinnikov S. G.
Lukyanenko, A. V. Fabrication of multi-terminal planar devices based on epitaxial Fe1-xSix films grown on Si(111) / A. V. Lukyanenko, A. S. Tarasov, I. A. Tarasov [et al.] ; A. V. Luyanenko [и др.]. - P .28
Другие авторы: Tarasov A. S., Tarasov I. A., Bondarev I. A., Smolyarova T. E., Yakovlev I. A., Volochaev M. N., Varnakov S. N., Ovchinnikov S. G., Volkov N. V.
Rautskii, M. V. Magnetic field-driven lateral photovoltaic effect in the Fe/SiO2/p-Si hibrid structure with the Scottky barrier / M. V. Rautskii [и др.]. - P .29
Другие авторы: Tarasov A. S., Varnakov S. N., Bondarev I. A., Volochaev M. N., Lukyanenko A. V., Volkov N. V.
Moryachkov, R. Small angle X-ray scattering and atomic structure of aptamer biomolecules / R. Moryachkov [и др.]. - P .14-15
Другие авторы: Tomilin F. N., Shchugoreva I., Spiridonova V., Peters G., Zabluda V.
Tarasov, I. A. Iron silicides and pure iron epitaxial and highly-textured nanostructures on silicon: growth and their physical properties : Invited / I. A. Tarasov [и др.]. - P .23
Другие авторы: Visotin M. A., Solovyov L. A., Rautskii M. V., Zhandun, V. S., Nemtsev I. V., Yakovlev I. A., Varnakov S. N, Ovchinnikov, S. G.
Sokolov, A. E. Magnetic nanoparticles and DNA-aptamers conjugates for diagnostics and therapy of cancer : Invited / A. E. Sokolov [и др.]. - P .13
Другие авторы: Zamay S., Zamay T., Svetlichnyi V., Velikanov D.
Sandalov, I. S. The microscopic origin of ferromagnetism in Fe silicides : Invited / I. S. Sandalov [и др.]. - P .16
Другие авторы: Zamkova N. G., Zhandun V. S., Ovchinnikov, S. G.

Материалы конференции
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Ovchinnikov, S. G. \предс. прогр. ком.\; Овчинников, Сергей Геннадьевич; Lukyanenko, A. V.; Varnakov, S. N.; Bondarev, I. A.; Ovchinnikov, S. G.; Tarasov, I. A.; Svetlichnyi, V.; Velikanov, D. A.; Spiridonova, V.; Peters, G.; Zabluda, V. N.; Popova, M. I.; Kholtobina, A. S.; Mikhaleva, N. S.; Visotin, M. A.; Yakovlev, I. A.; Volkov, N. V.; Rautskii, M. V.; Zhandun, V. S.; Nemtsev, I. V.; Varnakov, S. N; Mistonov, A.; Shabanov, A. V.; Terentiev, K. Yu.; Nesterov, A.; Ovchinnikova, T.; Smolyarova, T. E.; Volochaev, M. N.; Federal Research Center KSC SB RAS; Kirensky Institute of Physics; Siberian Federal Univercity; International Workshop on Actual Problems of Condensed Matter Physics (27 Mar. - 1 Apr. 2017 ; Krasnoyarsk / Cheremushki)
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