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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mireabulletin</journal-id><journal-title-group><journal-title xml:lang="ru">Russian Technological Journal</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Technological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-3210</issn><issn pub-type="epub">2500-316X</issn><publisher><publisher-name>RTU MIREA</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2500-316X-2019-7-4-92-100</article-id><article-id custom-type="elpub" pub-id-type="custom">mireabulletin-167</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МИКРО- И НАНОЭЛЕКТРОНИКА. ФИЗИКА КОНДЕНСИРОВАННОГО СОСТОЯНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MICRO- AND NANOELECTRONICS. CONDENSED MATTER PHYSICS</subject></subj-group></article-categories><title-group><article-title>Симметризованное приближение Максвелла–Гарнетта как эффективный метод исследования нанокомпозитов</article-title><trans-title-group xml:lang="en"><trans-title>Symmetrized Maxwell–Garnett Approximation as an Effective Method for Studying Nanocomposites</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яшин</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Yashin</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ассистент кафедры физики</p><p>105005, Россия, Москва, 2-я Бауманская ул., д. 5, стр. 1</p></bio><bio xml:lang="en"><p>Assistant of Professor of the Chair of Physics</p><p>5, Build. 1, 2nd Baumanskaya st., Moscow 1105005, Russia</p></bio><email xlink:type="simple">ihkamax@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мирзокулов</surname><given-names>Х. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Mirzokulov</surname><given-names>H. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ассистент кафедры «Телекоммуникационный инжиниринг»</p><p>100200, Узбекистан, Ташкент, ул. Амира Темура, д. 108</p></bio><bio xml:lang="en"><p>Assistant of Professor of the Chair «Telecommunications Engineering»108, Amir Temur st., Tashkent 100200, Uzbekistan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный технический университет имени Н.Э. Баумана</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bauman Moscow State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Самаркандский филиал Ташкентского университета информационных технологий имени Мухаммада ал-Хоразмий</institution><country>Узбекистан</country></aff><aff xml:lang="en"><institution>Samarkand branch of Tashkent University of Information Technologies named after Muhammad al-Khwarizmi</institution><country>Uzbekistan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>11</day><month>08</month><year>2019</year></pub-date><volume>7</volume><issue>4</issue><fpage>92</fpage><lpage>100</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Яшин М.М., Мирзокулов Х.Б., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Яшин М.М., Мирзокулов Х.Б.</copyright-holder><copyright-holder xml:lang="en">Yashin M.M., Mirzokulov H.B.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.rtj-mirea.ru/jour/article/view/167">https://www.rtj-mirea.ru/jour/article/view/167</self-uri><abstract><p>Рассмотрено приближение симметризованного Максвелла-Гарнетта (СМГ) как наи-более оптимальный метод эффективной среды для описания нанокомпозитных структур.Данное приближение учитывает микроструктуру образца, что делает возможным расчет системы металл-диэлектрик. Приближение применимо также для гранулированных сплавов, которые состоят из металлических компонент. Поэтому данную методику можно рассматривать как универсальное приближение для описания широкого класса наноструктурных материалов. В настоящей статье обсуждаются различные методы эффективной среды. В них металлическая составляющая накомпозитов и диэлектрическая матрица заменяются эффективной средой с эффективной диэлектрической проницаемостью εeff. Необходимо, чтобы частицы (гранулы) в таких структурах были малы по сравнению с длиной волны падающего на образец электромагнитного излучения. Основываясь на этом условии, мы рассчитали спектральные зависимости экваториального эффекта Керра (ЭЭК) в магнитных нанокомпозитах на примере структуры (CoFeZr)(Al2O3) при различных концентрациях магнитной компоненты. Моделирование проводили при малых и больших значениях концентрации (ниже и выше порога перколяции). Спектральные зависимости получали с учетом форм-фактора наночастиц и квазиклассического размерного эффекта. В работе обсуждается вклад различных механизмов, влияющих на вид спектров ЭЭК. С помощью симметризованного приближения Максвелла-Гарнетта найдены эффективные значения размера гранул исследуемых нанокомпозитов и рассчитан эффективный тензор диэлектрической проницаемости (ТДП). Полученные значения ТДП позволили смоделировать спектральные зависимости магнитооптического экваториального эффекта Керра. Сделаны выводы об особенностях полученных спектральных зависимостей в видимой и инфракрасной области спектра. Отмечена фундаментальная и практическая значимость полученных результатов и показана важность методов эффективной среды для изучения оптических, транспортных и магнитооптических свойств магнитных нанокомпозитов.</p></abstract><trans-abstract xml:lang="en"><p>The symmetrized Maxwell-Garnett (SMG) approximation is considered as the most optimal method of an effective medium for the description of nanocomposite structures. This approximation takes into account the microstructure of the sample, which makes it possible to calculate the metal-dielectric system. Thus, SMG describes with good accuracy the structure of the nanocomposite. Besides, this approximation is applicable for granular alloys consisting of metal components. As a result, this technique can be considered as a universal approximation to describe a wide class of nanostructured materials. At the same time, this article discusses various methods of effective environment. In these methods, the metal component of nanocomposites and the dielectric matrix are replaced by an effective medium with effective permittivity εeff. It is necessary that the particles (granules) in such structures be small in comparison with the wavelength of electromagnetic radiation incident on the sample. Based on this, the spectral dependences of the transverse Kerr effect (TKE) in magnetic nanocomposites were calculated with (CoFeZr)(Al2O3) structure as an example at different concentrations of the magnetic component. The simulation was carried out at small and large concentrations (below and above the percolation threshold). The spectral dependences were obtained taking into account the form factor of nanoparticles and the quasi-classical size effect. Besides, the authors note and discuss in this paper the contribution of various mechanisms that affect the type of spectra of the transverse Kerr effect. Using the symmetrized Maxwell-Garnett approximation, the effective values of the granule size of the nanocomposites under study were found, and the tensor of effective dielectric permittivity (TEDP) was calculated. The obtained TEDP values allowed to simulate the spectral dependences of the magneto-optical transverse Kerr effect. The authors discuss and draw conclusions about the features of the obtained spectral dependences in both the visible and infrared regions of the spectrum. In addition, the practical and fundamental importance of the obtained results is noted. The importance of effective medium methods for the study of optical, transport and magneto-optical properties of magnetic nanocomposites is shown.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>наноструктуры</kwd><kwd>магниторефрактивный эффект</kwd><kwd>магнитоотражение</kwd><kwd>магнитопропускание</kwd><kwd>магнитосопротивление</kwd><kwd>спин-зависящее рассеяние</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnetic nanocomposites</kwd><kwd>transverse Kerr effect</kwd><kwd>spectral dependence</kwd><kwd>symmetric Maxwell-Garnett approximation</kwd><kwd>effective medium</kwd><kwd>size effect</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Фостер Л. Нанотехнологии. Наука, инновации и возможности. М.: Техносфера, 2008. 352 с.</mixed-citation><mixed-citation xml:lang="en">Foster L. Nanotechnology. Science, Innovation and Opportunities. 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