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Общее количество найденных документов : 38
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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zharkov S. M., Zhigalov V. S., Kveglis L. I., Lisitsa Y. V., Renskaya K. V., Frolov G. I.
Заглавие : Cluster structure and superlattices in Co and Fe films
Место публикации : JETP Letters. - 1997. - Vol. 65, Is. 12. - P.915-918. - ISSN 0021-3640, DOI 10.1134/1.567449
Примечания : Cited References: 9
Аннотация: The process of dendritic crystallization of Co and Fe films is investigated. Electron-diffraction methods show that fractal growth of dendrites in Co and Fe films proceeds by multiple twinning of the elements of a nanostructure consisting of different clusters with close-packing. The formation of superstructures is explained by a shell model of a cluster structure forming nanocrystallites. (C) 1997 American Institute of Physics.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Zhigalov V. S.
Заглавие : Directional crystallization and self-assembling initiated by mechanical shock or electron beam in nanocrystalline Co-C and Fe-C films
Место публикации : Surface Science: Elsevier Science Publishing Company, Inc., 2007. - Т. 601, № 13. - С. 2873-2875. - ISSN 0039-6028, DOI 10.1016/j.susc.2006.12.044
ГРНТИ : 31.15
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov G. I., Bayukov O. A., Zhigalov V. S., Kveglis L. I., Myagkov V. G.
Заглавие : Electron-microscopy and mossbauer study of superlattices in iron films
Место публикации : JETP Letters. - 1995. - Vol. 61, Is. 1. - P.63-67. - ISSN 0021-3640
Примечания : Cited References: 6
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nyavro A. V., Cherepanov V. N., Arkhipkin V. G., Kveglis L. I., Musikhin V. A.
Заглавие : Electronic structure of grain boundaries in the Fe-86-Mn-12.7-C(1.3)alloy
Разночтения заглавия :авие SCOPUS: Electronic structure of grain boundaries in the Fe86-Mn 12.7-C1.3alloy
Место публикации : Russ. Phys. J.: SPRINGER, 2008. - Vol. 51, Is. 9. - P973-979. - ISSN 1064-8887, DOI 10.1007/s11182-009-9127-5
Примечания : Cited References: 13
Предметные рубрики: FERROMAGNETIC IRON
EXCHANGE
Аннотация: The importance of studying Fe-Mn-C alloys is related to their wide use as constructional materials in mechanical engineering. In this work an effort has been made to elucidate the physical origin of the magnetization in austenitic steels by calculating the electronic structure of grain boundaries. To theoretically investigate the magnetic properties of a crystal of ferromagnetic bcc iron, the wave functions of the iron atom calculated in view of the spin polarization of a core by the Hartree-Fock method with local exchange-correlation potentials have been used as base functions. This has made it possible to optimize the choice of a zero approximation for the description of the electronic states of ferromagnetic iron and to attain good agreement with the experimental values of the magnetic moment (A mu(theor) = 2.23A mu(B), A mu(exp) = 2.218A mu(B)), of the exchange splitting of the crystal term P-4 (Delta(theor) = Delta(exp) = 0.112 Ry), and of the cross-sections of the Fermi surface. A similar approach has been used to investigate the magnetic states of clusters (nanoclusters) based on the method of scattered waves. The approach developed for clusters of the alloy under investigation makes it possible to calculate the alloy magnetic properties in relation to the cluster size for a varied lattice parameter.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pavlov A. V., Kveglis L. I., Saprykin D. N., Nasibullin R. T., Kalitova A. A., Velikanov D. A., Nemtsev I. V., Kantai N.
Заглавие : Emergence of ferromagnetism in nanoparticles of BeTiO3 ceramic with the perovskite structure
Место публикации : Inorg. Mater.: Appl. Res. - 2021. - Vol. 12, Is. 1. - P.88-93. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113321010330
Примечания : Cited References: 21. - The part of the work involving calculations was supported by the Russian Science Foundation (grant no. 18-19-00268)
Аннотация: Emergence of ferromagnetism and an increase in the electrical conductance of BeTiO3 beryllium ceramic with the perovskite structure were discovered experimentally. To explain the reason for appearance of the metallic properties, models are proposed, and calculations of the electronic structure of nanoclusters with different short-range order are performed.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Jarkov S. M., Bondarenko G. V., Yakovchuk V. Y., Popel E. P.
Заглавие : Formation of Tetrahedrally Close-Packed Structures in Tb-Fe and Co-Pd Nanocrystalline Films
Коллективы : Russian Foundation for Basic Research [00-02-17358]; International Association of Assistance for the promotion of cooperation; New Independent States of the former Soviet Union [00-100]; Russian Academy of Sciences [56]; Krasnoyarsk Regional Scientific Foundation
Разночтения заглавия :авие SCOPUS: Formation of tetrahedrally close-packed structures in Tb-Fe and Co-Pd nanocrystalline films
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2002. - Vol. 44, Is. 6. - P1117-1121. - ISSN 1063-7834, DOI 10.1134/1.1485018
Примечания : Cited References: 16. - This work was supported by the Russian Foundation for Basic Research (project no. 00-02-17358), the International Association of Assistance for the promotion of cooperation with scientists from the New Independent States of the former Soviet Union (project no. 00-100), the 6th Competition of Research Projects of Young Scientists of the Russian Academy of Sciences (1999) (project no. 56), and the Krasnoyarsk Regional Scientific Foundation.
Аннотация: The crystal structure of Tb(30)Fe(70) and Co(50)Pd(50) nanocrystalline films with strong magnetic anisotropy perpendicular to the film plane (K(perpendicular to) similar to 10(6) erg/cm(3)) is investigated using electron diffraction and transmission electron microscopy. All the studied films in the initial nanocrystalline phase undergo an explosive crystallization with the formation of dendrite structures. It is demonstrated that, after crystallization, the Tb-Fe and Co-Pd films exhibit a tetrahedrally close-packed atomic structure that has no analogs among these materials in the equilibrium state. The internal stresses in the films under investigation are estimated from an analysis of the bend extinction contours in the electron microscope images. The inference is made that strong perpendicular magnetic anisotropy can be associated with magnetostriction anisotropy due to the specific features of the film structure. (C) 2002 MAIK "Nauka/Interperiodica".
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7.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kveglis L. I., Volochaev M. N., Noskov F. M.
Заглавие : Crystal and magnetic structures under martensite transformation in Fe86Mn13C alloy
Место публикации : Технические и естественные науки: теория и практика: сб. материалов/ ред. К. Е. Румянцев. - Киров: Междунар. центр науч.-исслед. проектов, 2015. - С.190-201
Аннотация: Self-assembly of crystal and magnetic structures was experimentally observed on a multiscale level in bulk and thin film Fe86Mn13C samples. A cluster model of the atomic self-assembly has been suggested based on the concept of a liquid-like state of material in localized areas produced by plastic deformation wavesЭкспериментально исследована самоорганизация кристаллической и магнитной структур на различных масштабных уровнях в массивных и тонкопленочных образцах сплава Fe86Mn13C. Предложена кластерная модель самоорганизации структуры на атомном уровне, основанная на представлениях о жидкоподобном состоянии материала в локализованных областях, сформированных волнами пластической деформации.
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Seredkin V. A., Kuzovnikov A. V.
Заглавие : Scale invariance of the structure upon explosive crystallization of amorphous films
Место публикации : JETP Letters. - 2005. - Vol. 82, Is. 1. - P.22-25. - ISSN 0021-3640, DOI 10.1134/1.2045332
Примечания : Cited References: 19
Аннотация: Experimental results that are obtained in the process of the explosive crystallization of x-ray amorphous films Fe2Tb and CoPd with magnetic anisotropy perpendicular to the film plane are reported. The internal bending of thus obtained "single crystals" reaches 100 deg/mu m. An explanation of the mechanism and kinetics of explosive crystallization in the Fe2Tb and CoPd films is proposed in the framework of the shear transformation zone theory. (C) 2005 Pleiades Publishing, Inc.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Jarkov S. M., Staroverova I. V.
Заглавие : Structural self-organization and the formation of perpendicular magnetic anisotropy in Co50Pd50 nanocrystalline films
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2001. - Vol. 43, Is. 8. - P1543-1548. - ISSN 1063-7834, DOI 10.1134/1.1395099
Примечания : Cited References: 22
Предметные рубрики: METAL THIN-FILMS
MICROSTRUCTURE
Аннотация: The correlation of the atomic-order structure and the energy density of perpendicular magnetic anisotropy in Co50Pd50 films is investigated. Structural models for nanocrystalline Co50Pd50 films are proposed. It is shown that processes of structural self-organization in the films form nontrivial atomic-order structures. These structures can exist owing to high elastic stresses, which apparently ensure the emergence of strong magnetic anisotropy (K-perpendicular to similar to 10(6) erg/cm(3)). (C) 2001 MAIK "Nauka/Interperiodica".
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kveglis L. I., Kuzovnikov A. V., Timofeev I. V.
Заглавие : The self-organization of tetrahedrally close-packed structures in magnetic nanocrystalline Tb-Fe and Co-Pd films
Коллективы : International Conference on Mechanical Spectroscopy and Relaxation Phenomena in Solids (3; 2006; Cracow, Poland)
Место публикации : Mechanical spectroscopy III: Mechanical spectroscopy and relaxation phenomena IN SOLIDS. Ser. Solid state phenomena: Trans tech publications LTD, 2006. - Vol. 115. - P.267-273. - ISBN 1012-0394. - ISBN 3-908451-24-8
Примечания : Cited References: 19
Предметные рубрики: AMORPHOUS FILMS
Ключевые слова (''Своб.индексиров.''): dissipative structures--explosive crystallization--thermal conductivity--tb-fe films--co-pd films
Аннотация: The self-organization of an atomic structure in Tb30Fe70 and Co50Pd50 films possessing of high values of the perpendicular magnetic anisotropy (PMA) constant (K perpendicular to similar to 10(6) erg/cm(3)) is investigated by transmission electron microscopy. The crystallization of the films is realized in an explosive way with formation of different dissipative structures from the initial nanocrystalline state. In present work the structural model of a thin film in mezzo-scale and the correlation of a structure with magnetic properties are discussed.
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