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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">10.35596/1729-7648-2020-18-2-5-13</article-id><article-id custom-type="elpub" pub-id-type="custom">bsuir-2635</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>МАЛОУГЛОВОЕ РАССЕЯНИЕ НЕЙТРОНОВ НА ОБРАЗЦАХ Sr2FeMoO6–δ С РАЗНОЙ СТЕПЕНЬЮ CВЕРХСТРУКТУРНОГО УПОРЯДОЧЕНИЯ КАТИОНОВ Fe/Mo</article-title><trans-title-group xml:lang="en"><trans-title>SMALL-ANGLE SCATTERING OF NEUTRONS ON Sr2FeMoO6–δ SAMPLES WITH DIFFERENT-DEGREE SUPERSTRUCTURAL ORDERING OF Fe/Mo CATIONS</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>Гурский</surname><given-names>Л. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Hurski</surname><given-names>L. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гурский Леонид Ильич, член-корреспондент НАН Беларуси, д.т.н., профессор, главный научный сотрудник Центра 9.1</p><p>220013, Республика Беларусь, г. Минск, ул. П. Бровки, д. 6; тел. +375-17- 293-85-17</p></bio><bio xml:lang="en"><p>Hurski Leonid Ilyich, D.Sci., Corresponding Member of the NAS of Belarus, D.Sci., Professor, Main Research Fellow of the Centre 9.1</p><p>220013, Republic of Belarus, Minsk, P. Brovka str., 6; tel. +375-17- 293-85-17</p></bio><email xlink:type="simple">lhur@bsuir.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>Каланда</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalanda</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.ф.м.н., ведущий научный сотрудник отдела криогенных исследований</p><p>г. Минск</p></bio><bio xml:lang="en"><p>Nikolay A. Kalanda, PhD, leading researcher of the Department of cryogenic research</p><p>Minsk</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>Ярмолич</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yarmolich</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.ф.м.н., старший научный сотрудник отдела криогенных исследований</p><p>г. Минск</p></bio><bio xml:lang="en"><p>Marta V. Yarmolich, PhD, senior researcher of the Department of cryogenic research </p><p>Minsk</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>Бобриков</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bobrikov</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.ф.-м.н., старший научный сотрудник</p><p>г. Дубна</p></bio><bio xml:lang="en"><p>Ivan A. Bobrikov, PhD, senior researcher </p><p>Dubna</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Желудкевич</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhaludkevich</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>научный сотрудник лаборатории физики высоких давлений и синтеза сверхтвердых материалов </p><p>г. Минск</p></bio><bio xml:lang="en"><p>Aliaksandr L. Zhaludkevich, researcher of laboratory of high pressure physics and synthesis of superhard materials </p><p>Minsk</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>Киреев</surname><given-names>П. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kireev</surname><given-names>P. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., зав. отделением машиностроительных материалов </p><p>г. Минск</p></bio><bio xml:lang="en"><p>Petr N. Kireev, PhD, Head of the Department of engineering materials </p><p>Minsk</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кривченя</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Krivchenya</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник лаборатории физики магнитных материалов</p><p>г. Минск</p></bio><bio xml:lang="en"><p>Dmitry.A. Krivchenya, junior researcher of the laboratory of physics of magnetic materials </p><p>Minsk</p></bio><xref ref-type="aff" rid="aff-2"/></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>ГО «НПЦ НАН Беларуси по материаловедению»</institution></aff><aff xml:lang="en"><institution>Scientific-Practical Materials Research Centre of NAS of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Лаборатория нейтронной физики им. И.М. Франка, Объединенный институт ядерных исследований</institution></aff><aff xml:lang="en"><institution>Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research</institution></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Институт порошковой металлургии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Powder Metallurgy Institute of NAS of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>31</day><month>03</month><year>2020</year></pub-date><volume>18</volume><issue>2</issue><fpage>5</fpage><lpage>13</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гурский Л.И., Каланда Н.А., Ярмолич М.В., Бобриков И.А., Желудкевич А.Л., Киреев П.Н., Кривченя Д.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Гурский Л.И., Каланда Н.А., Ярмолич М.В., Бобриков И.А., Желудкевич А.Л., Киреев П.Н., Кривченя Д.А.</copyright-holder><copyright-holder xml:lang="en">Hurski L.I., Kalanda N.A., Yarmolich M.V., Bobrikov I.A., Zhaludkevich A.L., Kireev P.N., Krivchenya D.A.</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/2635">https://doklady.bsuir.by/jour/article/view/2635</self-uri><abstract><p>Однофазные образцы Sr2FeMoO6-δ с различной степенью сверхструктурного упорядочения катионов Fe/Mo (P, 76, 86 и 93 %) были получены твердофазным методом. На основании результатов измерения магнитных характеристик в образцах установлено, что увеличение величин намагниченности (26,41, 32,36 и 42,66 А·м2·кг –1), магнитного момента (1,33, 3,07 и 3,58 μБ/ф.е.) и температур Кюри (422, 428 и 437 К) с ростом параметра P (76, 86 и 93 %) можно объяснить присутствием антиструктурных дефектов, а также антиферромагнитных включений. Наличие таковых обуславливает перераспределение электронной плотности, что сопровождается изменением электронной конфигурации части катионов Fe/Mo. На основании данных температурных зависимостей магнитного момента образцов, измеренных в ZFC и FC режимах, и малоуглового рассеяния поляризованных нейтронов (МУРН) установлено, что образцы находятся в магнитно-неоднородном состоянии. Важным результатом является обнаруженное различие между наклоном кривых МУРН образцов с различным содержанием кислорода, что свидетельствует о разной микроструктуре неоднородностей. Основными неоднородностями, на которых происходит рассеяние, являются магнитные включения с характерными размерами, зависящими от сверхструктурного упорядочения катионов Fe/Mo. Показано, что согласно закону Порода при значениях волнового вектора 0,1 &gt; q &gt; 0,002 Å–1 образцы Sr2FeMoO6-δ содержат полидисперсные зерна с гладкой и шероховатой поверхностью, а при q &gt; 0,1 Å–1 наблюдается отклонение от закона Порода, что указывает на наличие в зернах магнитных неоднородностей диаметром менее 6 нм.</p></abstract><trans-abstract xml:lang="en"><p>Single-phase Sr2FeMoO6-δ samples with different-degreesuperstructiral ordering Fe/Mo cations superstructural ordering (P, 76, 86 and 93 %) were obtained by the solid-phase technique. Based on the results of measuring the magnetic characteristics in the samples, we found that an increase in magnetization (26.41, 32.36 and 42.66 A·m2·kg–1), magnetic moment (1.33, 3.07 and 3.58 μB/f.u.) and Curie temperatures (422, 428 and 437 K) withparameter P (76, 86 and 93 %) can be explained by the presence of antistructural defects, as well as antiferromagnetic inclusions. This determines the redistribution of electron density, which is accompanied by the change in electronic configuration of a part of Fe/Mo cations. Based on the temperature dependences of the magnetic moment of the samples measured in ZFC and FC modes, and on small-angle polarized neutron scattering (SANS), we found that the samples are in a magnetically inhomogeneous state. An important result to mention is that we detected the difference between the slope of the SANS curves of samples with different oxygen content, which demonstrates a different microstructure of inhomogeneities. The main inhomogeneities are magnetic inclusions with the dimensions depending on the superstructural ordering of Fe/Mo cations. According to the Porod law, it was shown that the Sr2FeMoO6-δ samples with wave vector values 0.1 &gt; q &gt; 0.002 Å–1 contain polydisperse grains with a smooth surface. For q &gt; 0.1 Å–1 a deviation from the Porod law is observed, confirming the presence of magnetic inhomogeneities with a diameter &lt; 6 nm in the grains.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ферромолибдат стронция</kwd><kwd>сверхструктурное упорядочение</kwd><kwd>кислородная нестехиометрия</kwd><kwd>намагниченность</kwd><kwd>малоугловое нейтронное рассеяние</kwd></kwd-group><kwd-group xml:lang="en"><kwd>strontium ferromolybdate</kwd><kwd>superstructural ordering</kwd><kwd>oxygen non-stoichiometry</kwd><kwd>magnetization</kwd><kwd>small-angle neutron scattering</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках программы ЕС «Горизонт-2020» (H2020-MSCA-RISE-2018-823942 – FUNCOAT) и задания 1.02 ГПНИ Республики Беларусь «Физическое материаловедение, новые материалы и технологии», подпрограмма «Материаловедение и технологии материалов», а также проекта БРФФИ № Ф18Д-009.</funding-statement><funding-statement xml:lang="en">This work was carried out as part of the European project H2020-MSCA-RISE-2018-823942 – FUNCOAT and the Assignment No. 1.02 of the State Program of Scientific Research of the Republic of Belarus “Physical Materials Science, New Materials and Technologies” subprogram “Materials Science and Technologies”.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Serrate D., De Teresa J. 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