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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">bsuir</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады БГУИР</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady BGUIR</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7648</issn><issn pub-type="epub">2708-0382</issn><publisher><publisher-name>БГУИР</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35596/1729-7648-2022-20-2-13-20</article-id><article-id custom-type="elpub" pub-id-type="custom">bsuir-3306</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>ЭЛЕКТРОНИКА, РАДИОФИЗИКА, РАДИОТЕХНИКА, ИНФОРМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ELECTRONICS, RADIOPHYSICS, RADIOENGINEERING, INFORMATICS</subject></subj-group></article-categories><title-group><article-title>Косвенное обменное взаимодействие в углеродных нанотрубках</article-title><trans-title-group xml:lang="en"><trans-title>Indirect Exchange Coupling in Carbon Nanotubes</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>Данилюк</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Danilyuk</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>К.ф.-м.н., доцент, доцент кафедры микро- и наноэлектроники</p><p>220013, г. Минск, ул. П. Бровки, 6</p><p>тел. +375-017-293-23-17</p></bio><bio xml:lang="en"><p>Cand. of Sci., Associate Professor, Associate Professor at the Department of Micro- and Nanoelectronics</p><p>220013, Minsk, P. Brovka st., 6</p><p>tel. +375-017-293-23-17</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кухарев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kukharev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>К.ф.-м.н., доцент кафедры информационных технологий и управления бизнесом</p><p>г. Витебск</p></bio><bio xml:lang="en"><p>Cand. of Sci., Associate Professor at the Information Technologies and Business Management Department</p><p>Vitebsk</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайцев</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaitsau</surname><given-names>U. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры микро- и наноэлектроники</p><p>220013, г. Минск, ул. П. Бровки, 6</p><p>тел. +375-017-293-23-17</p></bio><bio xml:lang="en"><p>Ph.D. student at the Department of Micro- and Nanoelectronics</p><p>220013, Minsk, P. Brovka st., 6</p><p>tel. +375-017-293-23-17</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прищепа</surname><given-names>С. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Prischepa</surname><given-names>S. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Прищепа Сергей Леонидович - д.ф.-м.н., профессор, профессор кафедры защиты информации</p><p>220013, г. Минск, ул. П. Бровки, 6</p><p>тел. +375-017-293-23-17</p></bio><bio xml:lang="en"><p>Prischepa Serghej Leonidovich - Dr. of Sci, Professor, Professor at the Department of Information Security</p><p>220013, Minsk, P. Brovka st., 6</p><p>tel. +375-017-293-23-17</p></bio><email xlink:type="simple">prischepa@bsuir.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет информатики и радиоэлектроники</institution></aff><aff xml:lang="en"><institution>Belarusian State University of Informatics and Radioelectronics</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Витебский государственный университет им. П.М. Машерова</institution></aff><aff xml:lang="en"><institution>Vitebsk State University named after P.M. Masherov</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>05</day><month>04</month><year>2022</year></pub-date><volume>20</volume><issue>2</issue><fpage>13</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Данилюк А.Л., Кухарев А.В., Зайцев В.А., Прищепа С.Л., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Данилюк А.Л., Кухарев А.В., Зайцев В.А., Прищепа С.Л.</copyright-holder><copyright-holder xml:lang="en">Danilyuk A.L., Kukharev A.V., Zaitsau U.A., Prischepa S.L.</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://doklady.bsuir.by/jour/article/view/3306">https://doklady.bsuir.by/jour/article/view/3306</self-uri><abstract><p>Наноструктурированные магнитные композиты на основе углеродных нанотрубок (УНТ) и ферромагнитных наночастиц (ФНЧ) представляют большой интерес как с прикладной, так и с фундаментальной точек зрения. В частности, одной из особенностей УНТ с ФНЧ является возможность магнитного взаимодействия наночастиц посредством проводящей среды УНТ. Для детального описания этого особого типа взаимодействия – косвенного обменного взаимодействия – необходимо установить взаимосвязь между макроскопическими и микроскопическими параметрами физической системы. В наноструктурированных ферромагнетиках эти зависимости описываются в рамках модели случайной намагниченности, в которой спиновая система и, следовательно, основные макроскопические характеристики (коэрцитивность, восприимчивость, намагниченность насыщения) определяются такими микроскопическими параметрами, как константа обменного взаимодействия, намагниченности ФНЧ, константа локальной магнитной анизотропии и размер магнитного зерна. В данной работе, на основе полученных ранее микроскопических параметров нанокомпозитов УНТ – ФНЧ рассматривается возможность получения дальнодействующих магнитных корреляций посредством косвенного обменного взаимодействия (КОВ) между ФНЧ, встроенными внутрь многостенной УНТ (МУНТ). Используется модельный гамильтониан, учитывающий диаметр, хиральность, химический потенциал и спинорбитальное взаимодействие (СОВ) в системе. Причина возникновения заметного СОВ в УНТ – кривизна трубок, которая усиливает СОВ по сравнению с графеном, а также возможные дефекты и наличие ФНЧ. КОВ реализуется посредством p-электронов внутренней стенки МУНТ. Рассчитывается распределение спиновой восприимчивости вдоль оси МУНТ и показано, что при условии попадания химического потенциала в щель, открываемую СОВ, реализуется дальнодействующий магнитный порядок. Когерентность реализуется на расстояния до единиц микрон. Предложенный подход позволил также оценить энергию обменного взаимодействия между ФНЧ, относящимся к одной УНТ. Полученные результаты указывают на перспективность применения УНТ – ФНЧ нанокомпозита в углеродной спинтронике.</p></abstract><trans-abstract xml:lang="en"><p>Nanostructured magnetic composites based on carbon nanotubes (CNTs) and ferromagnetic nanoparticles (FNPs) are of great interest both from an applied and fundamental point of view. In particular, one of the features of CNTs with FNPs is the possibility of magnetic interaction of nanoparticles through the conducting medium of CNTs. For a detailed description of this special type of interaction, which is the indirect exchange coupling, it is necessary to establish the relationship between the macroscopic and microscopic parameters of the physical system. In nanostructured ferromagnets, these dependences are described within the framework of a random magnetization model in which the spin system and, consequently, the main macroscopic characteristics (coercivity, susceptibility, and saturation magnetization) are determined by such microscopic parameters as the exchange interaction constant, the FNP magnetization, the local magnetic anisotropy constant, and the grain size. In this paper, on the basis of the previously obtained microscopic parameters of CNT – FNP nanocomposites, the possibility of obtaining long-range magnetic correlations through the indirect exchange coupling (IEC) between FNP embedded inside a multi-wall CNT (MWCNT) is considered. A model Hamiltonian is used that takes into account the diameter, chirality, chemical potential and spin-orbit interaction (SOI) in the system. The reason for the appearance of a noticeable SOI in CNTs is the curvature of the tubes, which significantly increases the SOI compared to graphene, as well as possible defects and the presence of FNP. IEC is realized by means of p-electrons of the inner wall of the MWCNT. The propagation of the spin susceptibility along the MWCNT axis is calculated and it is shown that a long-range magnetic order is realized under the condition that the chemical potential enters the gap opened by the SOI. Coherence is realized at distances up to micrometers. The proposed approach also made it possible to estimate the energy of the exchange interaction between the FNP belonging to one CNT. The results obtained indicate the prospects for the use of CNT– FNP nanocomposites in carbon spintronics.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>углеродные нанотрубки</kwd><kwd>ферромагнитные наночастицы</kwd><kwd>косвенное обменное взаимодействие</kwd><kwd>модельный гамильтониан</kwd><kwd>спин-орбитальное взаимодействие</kwd></kwd-group><kwd-group xml:lang="en"><kwd>carbon nanotubes</kwd><kwd>ferromagnetic nanoparticles</kwd><kwd>indirect exchange coupling</kwd><kwd>model hamiltonian</kwd><kwd>spinorbit interaction</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">Weller D., Moser A., Folks L., Best M.E., Lee W., Toney M.F., Schwickert M., Thiele J.-U., Doerner M.F. High KU materials approach to 100 Gbit/in2. IEEE Trans. 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