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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2018-62-2-151-158</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-502</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>МАГНИТНЫЕ ФАЗОВЫЕ ПРЕВРАЩЕНИЯ В Sb-ЗАМЕЩЕННЫХ РЕДКОЗЕМЕЛЬНЫХ МАНГАНИТАХ НА ОСНОВЕ ИОНОВ Mn3+</article-title><trans-title-group xml:lang="en"><trans-title>MAGNETIC PHASE TRANSFORMATIONS IN Sb-SUBSTITUTED RARE-EARTH MANGANITES BASED ON Mn3+ IONS</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>Троянчук</surname><given-names>И. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Troyanchuk</surname><given-names>I. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>член-корреспондент, д-р физ.-мат. наук, профессор, заведующий лабораторией</p></bio><bio xml:lang="en"><p>Corresponding Member, D. Sc. (Physics and Mathematics), Professor, Head of the Laboratory</p></bio><email xlink:type="simple">troyan@physics.by</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>Бушинский</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bushinsky</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, ст. науч. сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Senior researcher</p></bio><email xlink:type="simple">bushinsky@physics.by</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>Терешко</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tereshko</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, науч. сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Researcher</p></bio><email xlink:type="simple">tereshko@physics.by</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>Чобот</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Chobot</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, науч. сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Researcher</p></bio><email xlink:type="simple">a.n.chobot@tut.by</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>Мантыцкая</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Mantytskaya</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, науч. сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Researcher</p></bio><email xlink:type="simple">mantytskaja@physics.by</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>Чобот</surname><given-names>Г. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Chobot</surname><given-names>G. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, доцент</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Assistant Professor</p></bio><email xlink:type="simple">g.m.chobot@tut.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пастушонок</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Pastushonok</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, доцент</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Assistant Professor</p></bio><email xlink:type="simple">sn195333@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Добрянский</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Dobraynsky</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р техн. наук, профессор</p></bio><bio xml:lang="en"><p>D. Sc. (Engineering), Professor</p></bio><email xlink:type="simple">dobryana1@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-практический центр Национальной академии наук Беларуси по материаловедению, Минск</institution></aff><aff xml:lang="en"><institution>Scientific and Practical Materials Research Centre of the National Academy of Sciences of Belarus, Minsk</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский государственный аграрный технический университет, Минск</institution></aff><aff xml:lang="en"><institution>Belarusian State Agrarian Technical University, Minsk</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Военная академия Республики Беларусь, Минск</institution></aff><aff xml:lang="en"><institution>Military Academy of the Republic of Belarus, Minsk</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>20</day><month>05</month><year>2018</year></pub-date><volume>62</volume><issue>2</issue><fpage>151</fpage><lpage>158</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Троянчук И.О., Бушинский М.В., Терешко Н.В., Чобот А.Н., Мантыцкая О.С., Чобот Г.М., Пастушонок С.Н., Добрянский В.М., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Троянчук И.О., Бушинский М.В., Терешко Н.В., Чобот А.Н., Мантыцкая О.С., Чобот Г.М., Пастушонок С.Н., Добрянский В.М.</copyright-holder><copyright-holder xml:lang="en">Troyanchuk I.O., Bushinsky M.V., Tereshko N.V., Chobot A.N., Mantytskaya O.S., Chobot G.M., Pastushonok S.N., Dobraynsky V.M.</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.belnauka.by/jour/article/view/502">https://doklady.belnauka.by/jour/article/view/502</self-uri><abstract><p>Проведены нейтронографические, магнитные и магнитотранспортные исследования перовскитов La1–x Srx ( Mn3+1-x/2 Sb5+x/2)O3 (x ≤ 0,7), содержащих только ионы Mn3+ . Показано, что при x ~ 0,2 система переходит из антиферромагнитного в ферромагнитное состояние. При этом структура меняется от O′-орторомбической к O-орторомбической, что обусловлено орбитальным разупорядочением. При x ≥ 0,6 появляется фаза кластерного спинового стекла вследствие конкуренции антиферромагнитных и ферромагнитных взаимодействий, а также сильного диамагнитного разбавления. При уменьшении ионного радиуса редкоземельного иона в серии R0,7Sr0,3Mn0,85Sb0,15O3 ферромагнитное состояние постепенно переходит в спиновое стекло (R = Sm). Все ферромагнитные составы являются диэлектриками в магнитоупорядоченной фазе с большой величиной магниторезистивного эффекта. Предполагается, что ферромагнетизм обусловлен большой ковалентностью и орбитальным разупорядочением.</p></abstract><trans-abstract xml:lang="en"><p>Neutron diffraction, magnetic and magnetotransport studies of perovskites La1–x Srx ( Mn3+1-x/2 Sb5+x/2)O3 (x ≤ 0,7) containing only Mn3+ ions were carried out. It is shown that at x ~ 0.2, the system goes from the antiferromagnetic state to the ferromagnetic one. In this case, the structure is transformed from the O′-orthorhombic structure to the O-orthorhombic one, which is due to orbital disordering. At x ≥ 0.6, the cluster spin glass phase arises due to the competition between antiferromagnetic and ferromagnetic interactions, as well as due to strong diamagnetic dilution. As the ionic radius of the rare-earth ion is decreased in the series R0,7Sr0,3Mn0,85Sb0,15O3, the ferromagnetic state is gradually transformed into spin glass (R = Sm). All ferromagnetic compounds are insulators with a large magnitude of the magnetoresistive effect. The high covalence and orbital disordering are assumed to be responsible for ferromagnetism in the compounds under study.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>магнитные материалы</kwd><kwd>фазовые превращения</kwd><kwd>намагниченность</kwd><kwd>обменное взаимодействие</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnetic materials</kwd><kwd>phase transitions</kwd><kwd>magnetization</kwd><kwd>exchange interactions</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">Coye, J. M. D. Mixed-valence manganites / J. M. D. Coye., M. Viret, S. von Molnár // Advances in Physics. – 1999. – Vol. 48, N 2. – P. 167–293. DOI: 10.1080/000187399243455</mixed-citation><mixed-citation xml:lang="en">Coye J. M. D., Viret M., von Molnár S. Mixed-valence manganites. Advances in Physics, 1999, vol. 48, no. 2, pp. 167– 293. 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