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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verpekin, Victor V., Chudin, Oleg S., Vasiliev A. D., Kondrasenko, Alexander A., Shor, Aleksey M., Burmakina, G. V., Zimonin, D. V., Maksimov, N. G., Rubaylo, A. I.
Заглавие : Trinuclear ReFePt clusters with a μ3-phenylvinylidene ligand: synthetic approaches, rearrangement of vinylidene, and redox-induced transformations
Коллективы : [0287-2021-0012]
Место публикации : Dalton Trans. - 2022. - Vol. 51, Is. 1. - P.324-339. - ISSN 1477-9226, DOI 10.1039/d1dt03750a. - ISSN 1477-9234(eISSN)
Примечания : Cited References: 66. - This work was conducted within the framework of the budget project # 0287-2021-0012 for Institute of Chemistry and Chemical Technology SB RAS using the equipment of Krasnoyarsk Regional Research Equipment Centre of Federal Research Centre, SB RAS
Предметные рубрики: RAY CRYSTAL-STRUCTURE
METAL-METAL
HETEROBIMETALLIC COMPLEXES
Аннотация: A series of trinuclear μ3-vinylidene ReFePt clusters were synthesized by the application of two approaches: (i) reactions of the binuclear RePt μ-vinylidene complexes with Fe2(CO)9; (ii) ligand substitution or exchange reactions at the Pt atom in the synthesized ReFePt clusters. The molecular structures of CpReFePt(μ3-C==CHPh)(CO)5[P(OEt)3]L [L = CO; P(OEt)3] were determined by an X-ray diffraction study. The obtained compounds were studied by IR and 1H, 13C and 31P NMR spectroscopy. The spectroscopic study revealed that the clusters CpReFePt(μ3-C==CHPh)(CO)5[P(OEt)3]L [L = CO; P(OEt)3] and CpReFePt(μ3-C==CHPh)(CO)6[P(OPri)3] undergo isomerization upon dissolution, resulting in three isomers with different positions of the μ3-vinylidene ligand over the ReFePt core. The redox properties of the clusters were studied by electrochemical methods. The relatively stable cation-radicals obtained by chemical oxidation of CpReFePt(μ3-C==CHPh)(CO)6[P(OPri)3] and CpReFePt(μ3-C==CHPh)(CO)5[P(OEt)3]2 with ferrocenium tetrafluoroborate were characterized by EPR spectroscopy.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis, Ludmila I., Noskov, Fedor M., Volochaev M. N., Nyavro, Alexander V., Filarowski, Aleksander
Заглавие : Magnetic properties of nickel-titanium alloy during martensitic transformations under plastic and elastic deformation
Место публикации : Symmetry. - 2021. - Vol. 13, Is. 4. - Ст.665. - ISSN 2073-8994(eISSN), DOI 10.3390/sym13040665
Примечания : Cited References: 61
Предметные рубрики: NITI SHAPE-MEMORY
CRYSTAL-STRUCTURE
WAVE MECHANICS
TRANSITIONS
Аннотация: This paper focuses on the processes of the occurrence of magnetization during structure formation in samples of Ni51Ti49 alloy under deformation conditions. The possibility of the existence of a phase with an FCC (face-centered cubic) lattice in titanium nickelide has been demonstrated by electron microscopy and electron diffraction. It has been discovered that the interplanar distances of BCC110 (body-centered cubic), FCC111, and HCP002 (hexagonal close packed) in the alloy under study have similar values, which indicates the possibility of their mutual polymorphic transformation. Based on the modular self-organization, a scheme of martensitic transformations in titanium nickelide from the B2 structure (BCC lattice) to the B19' structure (HCP lattice) through an intermediate phase with an FCC lattice is proposed. It is shown that lenticular crystals appear in the Ni51Ti49 alloy under tensile deformation until rupture, which is accompanied by the onset of ferromagnetism. The effect of magnetization in Ni51Ti49 samples when immersed in liquid nitrogen has been also discovered. In this case, the reason for the appearance and disappearance of magnetization can be associated with microdeformation processes caused by direct and reverse martensitic transitions that occur during cooling and heating of the samples.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Novikov P. V., Osipova I. V., Churilov G. N., Dudnik A. I.
Заглавие : Simulation of fullerene formation in a carbon-helium plasma
Место публикации : Fuller. Nanotub. Carbon Nanostruct. - 2021. - Vol. 29, Is. 5. - P.337-342. - ISSN 1536383X (ISSN), DOI 10.1080/1536383X.2020.1842738
Примечания : Cited References: 22
Аннотация: A kinetic model of fullerene formation in the carbon-helium plasma of an arc discharge was proposed. In the model, in addition to the coagulation of carbon clusters, the cluster isomerization and their cooling with a buffer gas were taken into account. The simulation results of the fullerene formation are in qualitatively agreement with the experimental data, i.e., the fraction of higher fullerenes increases at high pressures in the fullerene mixture.
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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Бедарев В. А., Меренков Д. Н., Кобец М. И., Звягин А. А., Попережай С. Н., Гнатченко С. Л., Zajarniuk T., Vasevych T., Gutowska M. U., Szewczyk A., Гудим, Ирина Анатольевна
Заглавие : Проявление спиновых корреляций в монокристалле ErAl3(BO3)4
Место публикации : Физ. низких температур. - 2019. - Т. 45, № 9. - С. 1217-1222. - ISSN 0132-6414. - ISSN 1816-0328 (eISSN)
Примечания : Библиогр.: 15
Аннотация: Установлено наличие существенного магнитного вклада в удельную теплоемкость монокристалла ErAl3(BO3)4 при температурах менее 5 К. Результаты измерений спектров ЭПР при 4,2 К также свидетельствуют о проявлении ближнего магнитного порядка. Полученные данные обсуждаются в рамках модели, учитывающей спин-спиновое взаимодействие между редкоземельными ионами в парных кластерах.Встановлено присутність суттєвого магнітного внеску в питому теплоємність монокристалу ErAl3(BO3)4 при температурах нижче 5 К. Результати вимірювань спектрів ЕПР при температурі 4,2 К також свідчать про прояв близького магнітного порядку. Отримані дані обговорюються у рамках моделі, яка враховує спін-спінову взаємодію між рідкісноземельними іонами у парних кластерах.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Iskhakov R. S., Fel'k V. A.
Заглавие : Fractal Dimension Effect on the Magnetization Curves of Exchange-Coupled Clusters of Magnetic Nanoparticles
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [18-42-240006]
Место публикации : J. Exp. Theor. Phys. - 2019. - Vol. 128, Is. 5. - P.754-760. - ISSN 1063-7761, DOI 10.1134/S1063776119040095. - ISSN 1090-6509(eISSN)
Примечания : Cited References: 54. - This work was supported by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund under the research project no. 18-42-240006.
Предметные рубрики: THIN-FILMS
COERCIVE FORCE
NANOCRYSTALLINE
SATURATION
FERROMAGNETS
Аннотация: The effect of the fractal dimension of exchange-coupled clusters of magnetic nanoparticles on their magnetization curves is predicted by scaling estimates. These predictions form the basis for the experimental technique used for determining the fractal dimension of nanoparticle clusters from the magnetization curves. We estimate the reliability of determining the dimension by such methods with the help of micromagnetic simulation. It is shown that the effective dimension of magnetic correlation volumes, which is determined from analysis of the magnetization approaching saturation, is in conformity with the dimension of fractal clusters determined from analysis of their morphology. The dimension estimated from analysis of the coercive field on the particle size in a physically natural situation of the dipole-dipole interaction between nanoparticles provides estimates of the cluster dimension, which strongly differs from estimates obtained from analysis of their morphology.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chudin O. S., Verpekin V. V., Vasiliev A. D., Rubaylo A. I.
Заглавие : Structure of a trinuclear μ3-vinylidene cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6
Место публикации : J. Struct. Chem. - 2017. - Vol. 58, Is. 3. - P.600-602. - ISSN 00224766 (ISSN), DOI 10.1134/S0022476617030234
Примечания : Cited References: 15
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Knyazev Yu. V., Bayukov O. A., Kazak N. V., Bezmaternykh L. N., Platunov M. S., Ovchinnikov S. G.
Заглавие : SPIN clusters in warwickite single crystals
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.5PO-I-6. - P.1019 (Шифр 29916280)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimov V. S., Ershov A. E., Karpov S. V., Polyutov S. P., Semina P. N.
Заглавие : Optimization of photothermal methods for laser hyperthermia of malignant cells using bioconjugates of gold nanoparticles
Место публикации : Colloid J.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 78, Is. 4. - P.435-442. - ISSN 1061933X (ISSN), DOI 10.1134/S1061933X16040050
Примечания : Cited References: 33. - This work was supported by the Ministry of Education and Science of the Russian Federation (contract no. 14.607.21.0104 RFMEFI60714X0104) (Section 3) and the State Assignment of the Ministry of Education and Science of the Russian Federation for Siberian Federal University (contract no. 1792) (Section 2). The numerical calculations were performed using the MVS-1000 M cluster at the Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences.
Предметные рубрики: THERMAL THERAPY
PLASMONIC NANOPARTICLES
OPTICAL-PROPERTIES
TUMOR-CELLS
CARCINOMA
CLUSTERS
CANCER
Аннотация: Selective action of laser radiation on membranes of malignant cells has been studied in different regimes using conjugates of gold nanoparticles with oligonucleotides by the example of DNA aptamers. Under the conditions of a contact between a bioconjugate and a cell surface and the development of substantial and rapidly relaxing temperature gradients near a nanoparticle, the membranes of malignant cells alone are efficiently damaged due to the local hyperthermia of a cellular membrane. It has been shown that employment of pulsed instead of continuous wave laser radiation provides the localization of the damaging action, which does not involve healthy cells. © 2016, Pleiades Publishing, Ltd.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Квеглис, Людмила Иосифовна, Носков Ф. М., Волочаев, Михаил Николаевич, Джее А. В.
Заглавие : Мартенситные превращения в никелиде титана через промежуточную фазу с ГЦК-решеткой
Место публикации : Физич. мезомеханика. - Томск, 2016. - Т. 19, № 2. - С. 100-107. - ISSN 1683-805X
Ключевые слова (''Своб.индексиров.''): никелид титана--пластическая деформация--мартенситное превращение--дифракция электронов--кристаллические структуры--кластеры--titanium nickelide--plastic deformation--martensitic transformation--electron diffraction--crystal structures--clusters
Аннотация: В работе рассматриваются процессы структурообразования в массивных образцах сплава Ni51Ti49, подвергнутых растягивающей нагрузке. Методами электронной микроскопии и дифракции электронов показана возможность существования фазы с ГЦК-решеткой в никелиде титана. Обнаружено, что межплоскостные расстояния ОЦК110, ГЦКШ и ГПУ002 в исследованном сплаве имеют близкие значения, что свидетельствует о возможности их взаимного полиморфного превращения. С позиции модульной самоорганизации предложена схема мартенситных превращений в никелиде титана из структуры В2 (ОЦК-решетка) в структуру В19' (ГПУ-решетка) через промежуточную фазу с ГЦК-решеткой.Structure formation in bulk Ni51Ti49 alloy specimens under tensile loading is studied. Electron microscopy and electron diffraction methods are applied to show that a phase with fcc lattice can be present in titanium nickelide. It is found that interplanar spacings bcc110, fcc111 and hcp002 in the studied alloy have close values, which demonstrates the possibility of their mutual polymorphic transformation. A scheme of B2B19' (bcchcp) martensitic transformation through an intermediate phase with fcc lattice is proposed for titanium nickelide from the standpoint of modular self-organization.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Dzhes A. V., Volochaev M. N., Cherkov A. G., Noskov F. M.
Заглавие : The clusters self-assembled crystal and magnetic structure during the martensite transition in Fe86Mn13C alloy
Место публикации : J. Sib. Fed. Univ. Eng. Technol. - 2015. - Vol. 8, Is. 1. - P.48-56. - ISSN 1999-494X; Журн. СФУ. Сер. "Техника и Технологии"
Примечания : Cited References: 14. - The authors thank to Zhigalov V.S., Kirensky Institute of Physics Russian Academy of Sciences Siberian Branch, V.N. Cherepanov, A.V. Nyavro Tomsk State University for assistance.This work is supported by a grant # 278 from the Ministry of Science and Education of the Republic of Kazakhstan.
Ключевые слова (''Своб.индексиров.''): тонкие магнитные пленки--сплав fe86mn13c--кластеры с плотноупакованной структурой--магнитная структура--плотность электронных состояний--волны пластической деформации--мартенситные превращения--thin magnetic films--fe86mn13c alloy--close packed structure clusters--magnetic structure--martensite transitions--density of electronic states--waves of plastic deformation
Аннотация: In bulk and thin ﬁlm state Fe86Mn13C alloy observed experimentally self-assembly of the crystal and magnetic structures on multiscale levels. Offered self-assembly cluster model of atomic structure based on the concept of a liquid-like state of the material in localized areas, formed in the waves of plastic deformation.В массивных и тонкопленочных образцах сплава Fe86Mn13C экспериментально наблюдается самоорганизация кристаллической и магнитной структур на разномасштабных уровнях. Предлагается кластерная модель атомной самоорганизации, основанная на концепции жидкоподобного состояния материала в локальных участках, образованных волнами пластической деформации.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kveglis L. I., Dzhes A. V., Volochaev M. N., Cherkov A. G., Noskov F. M.
Заглавие : Кластерная самоорганизация кристаллической и магнитной структур в процессе мартенситного превращения в сплаве Fe86Mn13C
Место публикации : Журн. СФУ. Сер. "Техника и Технологии". - 2015. - Т. 8, № 1. - С. 48-56. - ISSN 1999-494X; J. Sib. Fed. Univ. Eng. Technol.
Примечания : Cited References:14
Ключевые слова (''Своб.индексиров.''): thin magnetic films--fe86mn13c alloy--close packed structure clusters--magnetic structure--martensite transitions--density of electronic--states--waves of plastic deformation
Аннотация: In bulk and thin ﬁlm state Fe86Mn13C alloy observed experimentally self-assembly of the crystal and magnetic structures on multiscale levels. Offered self-assembly cluster model of atomic structure based on the concept of a liquid-like state of the material in localized areas, formed in the waves of plastic deformation.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verpekin V. V., Kondrasenko A. A., Chudin O. S., Vasiliev A. D., Burmakina G. V., Pavlenko N. I., Rubaylo A. I.
Заглавие : Chemistry of vinylidene complexes. XXIII. Binuclear rhenium-palladium vinylidene bridged complexes, their reactions with diiron nonacarbonyl
Место публикации : J. Organomet. Chem.: Elsevier Science, 2014. - Vol. 770. - P.42-50. - ISSN 0022-328X, DOI 10.1016/j.jorganchem.2014.07.024. - ISSN 1872-8561
Примечания : Cited References: 56. - This article is dedicated to the memory of Alla B. Antonova.
Предметные рубрики: TRANSITION-METAL-COMPLEXES
CATIONIC CARBYNE COMPLEXES
RAY CRYSTAL-STRUCTURE
MOLECULAR-STRUCTURE
HETEROBIMETALLIC COMPLEXES
LIGANDS
MANGANESE
CLUSTERS
DINUCLEAR
PD2CL2(MU-PH2PCH2PPH2)2
Ключевые слова (''Своб.индексиров.''): rhenium--palladium--iron--vinylidene complexes--heterometallic complexes
Аннотация: The reaction of [Cp(CO)2ReCCHPh] (1) with [Pd(PPh3)4] followed by the treatment of resulting [Cp(CO)2RePd(μ-CCHPh)(PPh3)2] (2) with diphosphines (dppe, dppp) gave new complexes [Cp(CO)2RePd(μ-CCHPh)(dppe)] (3) and [Cp(CO)2RePd(μ-CCHPh)(dppp)] (4). Treatment of the synthesized complexes with [Fe2(CO)9] led to mixtures of [Cp(CO)2ReFe(μ-CCHPh)(CO)4] (5), [(dppe)PdFe2(CO)8] (6), [CpReFe2(μ3-CCHPh)(CO)8] (7), [CpReFePd(μ3-CCHPh)(CO)5(dppe)] (8) and of 5, [(dppp)PdFe2(CO)8] (9), [CpReFePd(μ3-CCHPh)(CO)5(dppp)] (10), respectively. The main products of both reactions were trinuclear μ3-vinylidene clusters 8 and 10. Reactions of the trinuclear μ3-vinylidene ReFePd clusters 8 and 10 with Fe2(CO)9 were also studied. New complexes were characterized by IR, 1H, 13C, 31P NMR spectroscopy and cyclic voltammetry. The structure of [CpReFe2(μ3-CCHPh)(CO)8] was determined by single-crystal X-ray diffraction.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gurevich Y. L., Mankov Yu.I., Khlebopros R. G.
Заглавие : Self-assembly of superparamagnetic ferrihydrite nanoparticles
Коллективы : Russian Foundation for Basic Research [08-08-00427_a, 10-08-00278_a]; Siberian Branch, Russian Academy of Sciences, Integration project [21]
Место публикации : Dokl. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2013. - Vol. 58, Is. 11. - P.478-481. - ISSN 1028-3358, DOI 10.1134/S1028335813110104
Примечания : Cited References: 15. - This work was supported by the Russian Foundation for Basic Research, project nos. 08-08-00427_a and 10-08-00278_a, and by the Siberian Branch, Russian Academy of Sciences, Integration project no. 21.
Предметные рубрики: CHAINS
CLUSTERS
Аннотация: A study was conducted to estimate the possibility of formation of chains of superparamagnetic nanoparticles of iron oxyhydroxides synthesized in a bacteria culture. The self-assembly of biogenic nanoparticles distinguished by low values of magnetization and small sizes is assumed to proceed due to the forces of magnetic dipole dipole interaction as an initial mechanism of aggregation and exchange-interaction forces, which provide the stability of chains. The microphotographs demonstrate the self-assembly of anisotropic cobalt-doped ferrihydrite nanoparticles in aggregates of ellipsoidal shape with sizes of about 550 × 300 nm and a platelike shape of 50-100 nm thick. The aggregates, in turn, are combined from blocks, which include a restricted number of nanoparticles of about 5 nm in diameter and have the shape of rods of 50-100 × 12 nm in size. The energy of degaussing fields of chains is reasonably high, which forces them to form two and three dimensional structures in which the compensation of such fields is provided.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Isaev I. L., Semina P. N., Markel V. A., Karpov S. V.
Заглавие : Effects of size polydispersity on the extinction spectra of colloidal nanoparticle aggregates
Место публикации : Phys. Rev. B: American Physical Society, 2012. - Vol. 85, Is. 4. - Ст.045421. - P. - ISSN 1098-0121, DOI 10.1103/PhysRevB.85.045421
Примечания : Cited References: 41. - This work was supported by grants from the following foundations of the Russian Federation: Presidium of RAS, OFN RAS, and SB RAS.
Предметные рубрики: METAL FRACTAL CLUSTERS
OPTICAL-PROPERTIES
ABSORPTION
NONLINEARITIES
COMPOSITES
SCATTERING
PARTICLES
SPHERES
GRAINS
Аннотация: We investigate the effect of particle polydispersity on the optical extinction spectra of colloidal aggregates of spherical metallic (silver) nanoparticles, taking into account the realistic interparticle gaps caused by layers of stabilizing polymer adsorbed on the metal surface (adlayers). The spectra of computer-generated aggregates are computed using two different methods. The coupled-multipole method is used in the quasistatic approximation and the coupled-dipole method beyond the quasistatics. The latter approach is applicable if the interparticle gaps are sufficiently wide relative to the particle radii. Simulations are performed for two different particle size distribution functions (bimodal and Gaussian), varying the number of particles per aggregate, and different distribution functions of the interparticle gap width. The strong influence of the latter factor on the spectra is demonstrated and investigated in detail.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edel'man I. S., Petrov D. A., Ivantsov R. D., Zharkov S. M., Khaibullin R. I., Valeev V. F., Nuzhdin V. I., Stepanov A. L.
Заглавие : Microstructure and Magnetooptics of Silicon Oxide with Implanted Nickel Nanoparticles
Разночтения заглавия :авие SCOPUS: Microstructure and magnetooptics of silicon oxide with implanted nickel nanoparticles
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 113, Is. 6. - P1040-1049. - ISSN 1063-7761, DOI 10.1134/S1063776111160035
Примечания : Cited References: 44. - This work was supported by the Russian Foundation for Basic Research (project nos. 11-02-00972, 11-02-90420, 11-02-91341) and the program Research and Scientific-Pedagogical Brainpower of Innovated Russia (State contract 02.740.11.0797).
Предметные рубрики: SIMPLE METAL-CLUSTERS
OPTICAL-PROPERTIES
ION-IMPLANTATION
FARADAY-ROTATION
KERR SPECTRA
GLASS
RESONANCE
PHYSICS
ENERGY
FE
Ключевые слова (''Своб.индексиров.''): disperse structure--effective medium model--implanted samples--irradiation dose--magnetic circular dichroisms--magnetic nickel--magneto-optical faraday effect--magneto-optical measurements--matrix--metal nanoparticles--metallic nickel--nickel nanoparticles--nickel particles--optical range--spectral dependences--surface plasma resonances--tensor components--thin near-surface layers--amorphous silicon--crystal microstructure--dichroism--faraday effect--ion implantation--magnetoplasma--metallic compounds--nanomagnetics--nanoparticles--nickel--silicon compounds--silicon oxides--spectroscopy--tensors--transmission electron microscopy--nickel oxide
Аннотация: Metallic nickel nanoparticles of various sizes are formed in a thin near-surface layer in an amorphous SiO2 matrix during 40-keV Ni+ ion implantation at a dose of (0.25-1.0) x 10(17) ions/cm(2). The micro-structure of the irradiated layer and the crystal structure, morphology, and sizes of nickel particles formed at various irradiation doses are studied by transmission electron microscopy and electron diffraction. The magnetooptical Faraday effect and the magnetic circular dichroism in an ensemble of nickel nanoparticles are studied in the optical range. The permittivity (epsilon) over cap tensor components are calculated for the implanted samples using an effective medium model with allowance for the results of magnetooptical measurements. The spectral dependences of the tensor (epsilon) over cap components are found to be strongly different from those of a continuous metallic nickel film. These differences are related to a disperse structure of the magnetic nickel phase and to a surface plasma resonance in the metal nanoparticles.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yurkin G. Yu., Patrin G. S., Velikanov D. A., Beletsky V. V.
Заглавие : Transport properties of FeSi with cobalt impurities
Место публикации : TRENDS IN MAGNETISM. - 2011. - Vol. 168-169. - С. 493-496. - ISSN 10120394 (ISSN); 9783037850213 (ISBN), DOI 10.4028/www.scientific.net/SSP.168-169.493
Ключевые слова (''Своб.индексиров.''): iron monosilicide--kondo effect--magnetization--resistivity--spindependent scattering--superparamagnetic cluster--cobalt--crystals--electric resistance--electron energy loss spectroscopy--kondo effect--magnetic field effects--magnetic properties--magnetization--magnetoresistance--scattering--superparamagnetism--transport properties--cobalt--electric conductivity--electron scattering--impurities--kondo effect--magnetism--magnetization--experimental investigations--kondo models--magnetoresistance properties--resistivity--si crystals--spin dependent scattering--superparamagnetic clusters--crystal impurities--crystal impurities
Аннотация: The results of experimental investigations of Fe1-xCo xSi crystals in the impurity limit are presented in this article. We made an attempt to study changes of magnetic properties and conductivity in mixed Fe1-xCoxSi crystals in the impurity limit. Magnetoresistance properties are well described in the framework of Kondo model. The presence of Co-subsystem leads to the occurrence of spin-dependent channel in electron scattering conduction.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zobov V. E.
Заглавие : THE critical exponent of the tree lattice generating function in the eden model
Разночтения заглавия :авие SCOPUS: The critical exponent of the tree lattice generating function in the eden model
Место публикации : Theor. Math. Phys.: SPRINGER, 2010. - Vol. 165, Is. 2. - P1443-1455. - ISSN 0040-5779, DOI 10.1007/s11232-010-0120-5
Примечания : Cited References: 14
Предметные рубрики: GROWTH PARAMETER
CLUSTERS
DIMENSIONS
SYSTEMS
Ключевые слова (''Своб.индексиров.''): number of lattice trees--tree perimeter--generating function--critical exponent--hypercubic lattice--bethe lattice--eden model--bethe lattice--critical exponent--eden model--generating function--hypercubic lattice--number of lattice trees--tree perimeter
Аннотация: We consider the increase in the number of trees as their size increases in the Eden growth model on simple and face-centered hypercubic lattices in different space dimensions. We propose a first-order partial differential equation for the tree generating function, which allows relating the exponent at the critical point of this function to the perimeter of the most probable tree. We estimate tree perimeters for the lattices considered. The theoretical values of the exponents agree well with the values previously obtained by computer modeling. We thus explain the closeness of the dimension dependences of the exponents of the simple and face-centered lattices and their difference from the results in the Bethe lattice approximation.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sorokin P.B., Kvashnin D.G., Kvashnin A.G.
Заглавие : Theoretical study of the elastic properties of branched silicon nanowires
Коллективы : "Fullerenes and Atomic Clusters", Biennial International Workshop
Место публикации : 9th Biennial International Workshop "Fullerenes and Atomic Clusters" (IWFAC 2009): July 6-10, 2009, St Petersburg, Russia : abstracts. - 2009. - Ст.P4.6. - С. 101
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sorokin P.B., Zaitsev A.A.
Заглавие : The theoretical study of electronic structure of single nanotube of TiB2
Коллективы : "Fullerenes and Atomic Clusters", Biennial International Workshop
Место публикации : 9th Biennial International Workshop "Fullerenes and Atomic Clusters" (IWFAC 2009): July 6-10, 2009, St Petersburg, Russia : abstracts. - 2009. - Ст.P4.10. - С. 105
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