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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 custom-type="elpub" pub-id-type="custom">dan-321</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>КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА И СЛАБЫЙ ФЕРРОМАГНЕТИЗМ МУЛЬТИФЕРРОИКОВ Bi 1–x Cax Fe1–x Mnx O3</article-title><trans-title-group xml:lang="en"><trans-title>CRYSTAL STRUCTURE AND WEAK FERROMAGNETISM OF Bi 1–x Cax Fe1–x Mnx O3  MULTIFERROICS</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 </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><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>Карпинский</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Karpinsky</surname><given-names>D. V.</given-names></name></name-alternatives><email xlink:type="simple">karpinsky@ifttp.bas-net.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><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>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><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>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><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><email xlink:type="simple">g.m.chobot@tut.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>НПЦ НАН Беларуси по материаловедению</institution></aff><aff xml:lang="en"><institution>Scientific and Practical Materials Research Centre of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский государственный аграрный технический университет</institution></aff><aff xml:lang="en"><institution>Belarusian State Agrarian Technical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>05</day><month>08</month><year>2016</year></pub-date><volume>60</volume><issue>3</issue><fpage>57</fpage><lpage>62</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Троянчук И.О., Бушинский М.В., Карпинский Д.В., Чобот А.Н., Терешко Н.В., Мантыцкая О.С., Чобот Г.М., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Троянчук И.О., Бушинский М.В., Карпинский Д.В., Чобот А.Н., Терешко Н.В., Мантыцкая О.С., Чобот Г.М.</copyright-holder><copyright-holder xml:lang="en">Troyanchuk I.O., Bushinsky M.V., Karpinsky D.V., Chobot A.N., Tereshko N.V., Mantytskaya O.S., Chobot G.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/321">https://doklady.belnauka.by/jour/article/view/321</self-uri><abstract><p>Проведено исследование кристаллической структуры и магнитных свойств мультиферроиков Bi1–x Cax Fe1–x Mnx O3 (x ≤ 0,22). Обнаружена следующая последовательность кристаллоструктурных превращений в стехиометрических составах: ромбоэдрическая (пр. группа R3c) полярная фаза (х ≤ 0,18), орторомбическая (пр. группа Pnma) неполярная фаза (х &gt; 0,19). Полярная фаза является антиферромагнитной и проявляет метамагнетизм при x &lt; 0,10. Полярная и неполярная фазы являются слабыми ферромагнетиками при комнатной температуре со спонтанной намагниченностью, близкой к 0,07 emu/g (x = 0,18 и х = 0,22). Понижение температуры ведет к переходу в состояние, близкое к антиферромагнитному. </p></abstract><trans-abstract xml:lang="en"><p>The crystal structure and magnetic properties of Bi1–x Cax Fe1–x Mnx O3 (x ≤ 0.22) have been studied. It was shown that the rhombohedral (R3c) polar phase at x &gt; 0.18 transforms into the nonpolar orthorhombic phase (Pnma). The polar phase is antiferromagnetic and metamagnetic at x &lt; 0.1. The polar and nonpolar phases are weak ferromagnets with remnant magnetization around 0.07 emu/g (x = 0.18 and х = 0.22). Decreasing the temperature leads to the state close to antiferromagnetic. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>мультиферроики</kwd><kwd>магнитные материалы</kwd><kwd>дифракция</kwd><kwd>фазовые переходы</kwd><kwd>намагниченность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multiferroics</kwd><kwd>magnetic materials</kwd><kwd>diffraction</kwd><kwd>phase transitions</kwd><kwd>magnetization</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">Catalan, G. Physics and Applications of Bismuth Ferrite / G. Catalan, J. F. Scott // Adv. Mater. – 2009. – Vol. 21. – P. 2463–2485.</mixed-citation><mixed-citation xml:lang="en">Catalan, G. Physics and Applications of Bismuth Ferrite / G. Catalan, J. F. Scott // Adv. 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