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    Co nanoparticles localized in matrices of Various types: magnetooptical and magnetotransport properties / Yu. E. Samoshkina, D. A. Petrov, M. V. Rautskii [et al.] // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 1, Sect. : Magnetotransport, magnetooptics and magnetophotonics. - Ст. D.P14. - P. 466-467. - Cited References: 8. - This research was funded by the Russian Science Foundation grant No. 21-72-00061 . - ISBN 978-5-94469-051-7
   Перевод заглавия: Наночастицы кобальта, локализованные в матрицах разного типа: магнитооптические и магнитотранспортные свойства

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Ural Federal University, Ekaterinburg, Russia
Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Kazan, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \program com.\; Овчинников, Сергей Геннадьевич; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Petrov, D. A.; Петров, Дмитрий Анатольевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Neznakhin, D. S.; Stepanova, E. A.; Stepanov, A. L.; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
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Correlation between magneto-optical and transport properties of Sr doped manganite films / Y. E. Samoshkina [et al.] // J. Alloys Compd. - 2019. - Vol. 782. - P. 334-342, DOI 10.1016/j.jallcom.2018.12.158. - Cited References: 51. - The authors are grateful to A.V. Malakhovskii (Kirensky Institute of Physics, Federal Research Center KSC SB RAS) for fruitful discussions of the magneto-optics data and V.I. Chichkov and N.V. Andreev (National University of Science and Technology MISiS) for the preparation of the manganite films. The work was supported partly by Russian Academy of Sciences , [grant number 0356-2017-0030 ], and the Russian Foundation for Basic Research , [grant number 16-32-00209 ]. . - ISSN 0925-8388
Кл.слова (ненормированные):
Thin films -- Manganites -- Crystal structure -- Electrical transport -- Electronic properties -- Magnetic circular dichroism
Аннотация: The features of electronic structure of La0.7Sr0.3MnO3 Pr0.8Sr0.2MnO3, and Pr0.6Sr0.4MnO3 polycrystalline films of different thickness have been investigated using magnetic circular dichroism (MCD) in the range of 1.1–4.2 eV. The temperature behavior of the samples electrical resistance were also has been studied. It was found that films with high Sr content (0.3 and 0.4) act as high-temperature semiconductors, while the maximum in the temperature dependences of resistivity these films indicates the transition of the samples to the metallic state at some temperature TM-S, which is different for different sample thickness. The films with the lower Sr content (0.2) act as insulators in the used temperature range. The MCD spectra have been decomposed to the Gaussian-shaped lines, and the temperature dependence of intensity of each line has been analyzed in comparison with temperature dependence of the films magnetization and with their electric conductivity type. Different temperature behavior of the intensity of four specified Gaussian-lines was revealed for semiconductor films. In the case of insulating Pr0.8Sr0.2MnO3 samples, the intensity of three specified Gaussian lines changes with the temperature in the same way as the magnetization changed. It was established that the lanthanide (La, Pr) type does not affect the MCD spectra shape for the films with the same electrical conductivity type. Besides, the correlation between the MCD data of the films and their conductivity type was revealed. Due to the detailed analysis of the specified Gaussian lines with taking into account the well-known in the literature absorption bands, lying outside the studied spectral region, the MCD bands for the studied manganite films have been identified with electronic transitions of a different nature.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич
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    Determination of the existence region of a Griffith-like phase in Pr1–xSrxMnO3/YSZ films / Y. E. Samoshkina [et al.] // J. Exp. Theor. Phys. - 2017. - Vol. 125, Is. 6. - P. 1090-1095, DOI 10.1134/S106377611712007X. - Cited References:34. - This study was supported by the Russian Foundation for Basic Research (project no. 16-32-00209mol_a) and the Council for Grants from the President of the Russian Federation (NSh7559.2016.2). E. A. Stepanova and D. S. Neznakhin were supported by the RF Ministry of Education and Sciences (State target no. 3.61212017/8.9). . - ISSN 1063-7761. - ISSN 1090-6509
Рубрики:
COLOSSAL MAGNETORESISTANCE
   ELECTRICAL-PROPERTIES
   RARE-EARTH
Аннотация: We have studied the temperature dependences of the magnetic susceptibility and the electron magnetic resonance in Pr1–xSrxMnO3/YSZ polycrystalline films (x = 0.2, 0.4). The paramagnetic properties of samples indicate the presence of short-range-order ferromagnetic correlations above the phase transition temperature (Tc ). The existence region of such correlations has been considered using the Griffith theory.

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Публикация на русском языке Определение области существования фазы, подобной фазе Гриффитса, в пленках Pr1-xSrxMnO3/YSZ [Текст] / Ю. Э. Самошкина [и др.] // Журн. эксперим. и теор. физ. - 2017. - Т. 152 Вып. 6. - С. 1279-1285

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Fed Res Ctr,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Eltsyn Ural Fed Univ, Ekaterinburg 620002, Russia.
Natl Res Technol Univ MISiS, Moscow 119049, Russia.

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Stepanova, E. A.; Neznakhin, D. S.; Andreev, N. V.; Chichkov, V. I.; Russian Foundation for Basic Research [16-32-00209mol_a]; Council for Grants from the President of the Russian Federation [NSh7559.2016.2]; RF Ministry of Education and Sciences [3.61212017/8.9]
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Samoshkina, Yu. E.
Electronic and magnetic states of Pr and Mn in the Pr1–xSrxMnO3 films studied by XANES and XMCD spectroscopy / Y. E. Samoshkina, A. Rogalev // J. Exp. Theor. Phys. - 2018. - Vol. 126, Is. 5. - P. 660-665, DOI 10.1134/S1063776118040131. - Cited References: 35. - We thank V.I. Chichkov and N.V. Andreev (National University of Science and Technology MISiS) for the preparation of the manganite films. - This work was supported by the Russian Foundation for Basic Research (project no. 16-32-00209 mol_a) and a grant of the President of the Russian Federation (NSh-7559.2016.2). . - ISSN 1063-7761
Кл.слова (ненормированные):
Circular dichroism spectroscopy -- Dichroism -- Film growth -- Magnetic moments -- Manganese -- Praseodymium -- Strontium compounds -- X ray absorption
Аннотация: The spectral dependences of X-ray absorption near-edge spectroscopy (XANES) and X-ray magnetic circular dichroism (XMCD) and the field dependences of XMCD near the K edge of Mn and the L2,3 edges of Pr in the Pr0.8Sr0.2MnO3 and Pr0.6Sr0.4MnO3 films at T = 90 K are studied. The spectral dependences point to a mixed valence state of Mn and Pr in the films. It is found that, as compared to XANES, XMCD is more sensitive to the valence state of Pr4+. The field dependences of XMCD point to ferromagnetic behavior of Mn ions and the Van Vleck paramagnetism of Pr ions, which makes a significant contribution to the total magnetization of the films. It is shown that as the Sr concentration increases, the XMCD intensity at the K edge of Mn increases, which indicates a growth of the total magnetic moment of the film due to an increase in the 4p–3d hybridization.

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Публикация на русском языке Самошкина, Юлия Эрнестовна. Электронные и магнитные состояния Pr и Mn в пленках Pr1-xSrxMnO3 по данным спектроскопии XANES и XMCD [Текст] / Ю. Э. Самошкина, А. Л. Рогалев // Журн. эксперим. и теор. физ. - 2018. - Т. 153 Вып. 5. - С. 794-799

Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,” Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
European Synchrotron Radiation Facility, Grenoble, CS, France

Доп.точки доступа:
Rogalev, A.; Самошкина, Юлия Эрнестовна
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    Features of the magneto-optical response in manganite films / Yu. E. Samoshkina [et al.] // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 5PO-K3-2. - P. 1093
   Перевод заглавия: Особенности магнитооптического отклика в пленках манганита

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Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Maximova, O. A.; Максимова, Ольга Александровна; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В.И.; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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    Giant hydrogen effect on the structure and physical properties of ZnO and Co-doped ZnO films fabricated by the RF magnetron sputtering in Ar + H2 atmosphere / I. S. Edelman [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 489. - Ст. 165461, DOI 10.1016/j.jmmm.2019.165461. - Cited References: 39. - The work is supported by the Russian Academy of Sciences in the frames of Project No 0356-2017-0030 and by the Ministry of Science and Technology of Taiwan MOST 106-2112-M-110-001. . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Колоссальное влияние водорода на структуру и физические свойства пленок ZnO и ZnO допированных кобальтом, полученных методом высокочастотного магнетронного распыления в атмосфере аргона и водорода

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
MAGNETOOPTICAL PROPERTIES
OPTICAL-PROPERTIES
FERROMAGNETISM
Кл.слова (ненормированные):
ZnO films -- Co-doped ZnO films -- Films hydrogenation -- Magnetic circular -- dichroism -- Room temperature ferromagnetism
Аннотация: ZnO and Co-doped ZnO films were synthesized by the radio frequency magnetron sputtering in mixed atmosphere of Ar + 20% O2 and Ar + 20–50% H2. The morphology, chemical composition, crystal structure, optical transmission, electrical resistance, and magnetic circular dichroism of the films were investigated. It was established that the films thickness decreased several times when Ar was partly replaced by hydrogen in the sputtering chamber. At the same time, for the Co-doped ZnO films, the increase in the relative Co content with the increasing hydrogen concentration was observed. These phenomena are explained by the formation of gaseous ZnH2 because of the hydrogen reaction with the growing films under the conditions of the high substrate temperature (450 °C) and, respectively, the decrease in the Zn component in the films. The hydrogenated Co-doped ZnO films exhibit an increase in electric conductivity and ferromagnetic behavior at room temperature. The magnetic nature of the films is explained by a combination of the intrinsic ferromagnetism (due to the formation of the Co-H-Co complex) with the inclusion of metallic Co clusters.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan.
Natl Univ Kaohsiung, Dept Appl Phys, Kaohsiung 81148, Taiwan.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
ESRF, CS 40220, F-38043 Grenoble, France.

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Chou, Hsiung; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Petrov, D. A.; Петров, Дмитрий Анатольевич; Lin, Hsien C.; Chan, Wen L.; Sun, Shih-Jye; Zharkov, S. M.; Жарков, Сергей Михайлович; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич; Platunov, M. S.; Платунов, Михаил Сергеевич; Rogalev, A.; Russian Academy of Sciences [0356-2017-0030]; Ministry of Science and Technology of Taiwan [MOST 106-2112-M-110-001]
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    High-temperature martensitic transformation in Pr-Sr manganites / Yu. E. Samoshkina, M. V. Rautskii, D. S. Neznakhin [et al.] // IEEE International Magnetics Virtual Conference (INTERMAG'21) : Digest book. - 2021. - Ст. DP-08. - P. 686. - Cited References: 8
   Перевод заглавия: Высокотемпературная мартенситная трансформация в Pr-Sr манганитах

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Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Neznakhin, D. S.; Stepanova, E.; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В.И.; IEEE International Magnetics Conference(2021 ; Apr. 26-30 ; Lion, France (Virtual))
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Inhomogeneity of magnetic states in polycrystalline Sr doped PrMnO3 films / Yu. E. Samoshkina, M. V. Rautskii, D. S. Neznakhin [et al.] // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст. H.P10. - P. 88-89. - Cited References: 3 . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Ural Federal University n.a. the first President of Russia B.N. Yeltsin
National Research Technological University “MISiS”

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Neznakhin, D. S.; Stepanova, E. A.; Andreev, N.; Chichkov, V. I.; Чичков В. И.; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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    Inhomogeneity of the magnetic state in the Pr1-xSrxMnO3/YSZ films studied by electron magnetic resonance / Yu. E. Samoshkina [et al.] // Int. Workshop on Phase Transit. and Inhomogeneous States in Oxides : book of abstracts / чл. орг. ком. I. N. Flerov. - Kazan, 2017. - P. 29. - Библиогр.: 4. - The work was supported by the Russian Foundation for Basic Researches, Grant No. 16-32-00209 mol_a and the Grant of the President of the Russian Federation no. NSh-7559.2016.2
   Перевод заглавия: Неоднородность магнитных состояний в Pr1-xSrxMnO3/YSZ пленках, изученная с помощью электронного магнитного резонанса

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Доп.точки доступа:
Flerov, I. N. \чл. орг. ком.\; Флёров, Игорь Николаевич; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В.И.; International Workshop on Phase Transitions and Inhomogeneous States in Oxides(2017 ; june ; 25-30 ; Kazan); "Фазовые переходы и неоднородные состояния в оксидах", международный семинар(2017 ; июнь ; 25-30 ; Казань)
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10.

La-Sr and Pr-Sr polycrystalline manganite films: correlation between magneto-optical and transport properties / Yu. E. Samoshkina [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P6.7. - P. 315. - The work was supported partly by the Russian Foundation for Basic Researches, Grants Nos. 14-02-01211 and 16-32-00209 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
hole-doped manganites -- thin films -- magnetic circular dichroism -- metal-insulator transition

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A. E.; Соколов, Алексей Эдуардович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Semenov, S. V.; Семёнов, Сергей Васильевич; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В.И.; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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11.

    Linear and quadratic magneto-optical effects observed in La-Sr and Pr-Sr hole doped manganites in transmitted / Yu. E. Samoshkina [et al.] // 8th Joint Europ. Magn. Symp. (JEMS-2016) : Book of abstracts. - 2016. - The work was supported by the Russian Foundation for Basic Research, Grants Nos. 14-02-01211 and 16-32-00209
   Перевод заглавия: Линейный и квадратичный магнитооптические эффекты, наблюдаемые в La-Sr и Pr-Sr дырочно допированных манганитов в проходящем свете

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Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A. E.; Соколов, Алексей Эдуардович; Maximova, O. A.; Максимова, Ольга Александровна; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В. И.; Institute of Physics; Joint European Magnetic Symposia(8 ; 2016 ; Aug. ; 21-26 ; Glasgow, UK)
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12.

Samoshkina, Yu. E.
Low-hydrogenated ZnCoAlO films: structure, magneto-optical and magnetic behavior / Y. E. Samoshkina, D. A. Petrov, H. Chou // Appl. Phys. A. - 2022. - Vol. 128, Is. 6. - Ст. 519, DOI 10.1007/s00339-022-05665-z. - Cited References: 16. - This research was funded by the Russian Science Foundation Grant No. 21-72-00061 . - ISSN 0947-8396
Кл.слова (ненормированные):
Diluted oxides -- Polycrystalline thin films -- Hydrogenation -- Magnetic circular dichroism
Аннотация: Morphology, chemical composition, crystal structure, and magnetic circular dichroism of ZnO films doped simultaneously with Co and Al (CAZO) have been studied. The films were deposited on glass substrates by the RF magnetron sputtering of the Zn0.93Co0.05Al0.02O target. Low hydrogen concentrations of 1–4% were used in mixed Ar + H2 atmosphere together with high enough substrate temperature of 450 °C. A tendency to a decrease in the Zn amount and an increase in the relative Co and Al content in the films has been revealed in the presence of hydrogen in the atmosphere. The structural data of the studied films correlate well with those for high-hydrogenated (20–50% H2) CAZO films deposited under the same conditions and studied earlier. The new data indicate the prospect of obtaining ferromagnetic samples based on ZnO without any secondary phases.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics, National Sun Yat-Sen University, Kaohsiung, 80424, Taiwan
Department of Applied Physics, National University of Kaohsiung, Kaohsiung, 81148, Taiwan

Доп.точки доступа:
Petrov, D. A.; Петров, Дмитрий Анатольевич; Chou, H.; Самошкина, Юлия Эрнестовна
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13.

Magnetic and electrical properties of high-hydrogenated CoxZn1-xO thin films / Yu. E. Samoshkina [et al.] // Магнитные материалы. Новые технологии : тез. докл. VIII Байкал. междунар. конф. BICMM-2018 / чл. прогр. ком. R. S. Iskhakov [et al.]. - Иркутск, 2018. - P. 123-124. - Библиогр.: 2 . - ISBN 978-5-00133-051-6

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Iskhakov, R. S. \чл. прогр. ком.\; Исхаков, Рауф Садыкович; Ovchinnikov, S. G. \чл. прогр. ком.\; Овчинников, Сергей Геннадьевич; Aplesnin, S. S. \чл. прогр. ком.\; Аплеснин, Сергей Степанович; Balaev, D. A. \чл. прогр. ком.\; Балаев, Дмитрий Александрович; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edel'man, I. S.; Эдельман, Ирина Самсоновна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Neznakhin, D. S.; Stepanova, E. A.; Байкальская международная конференция "Магнитные материалы. Новые технологии"(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Magnetic materials. New tecnologies", Baikal International Conference(8 ; 2018 ; Aug. 24-28 ; Irkutsk); Иркутский государственный университет
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14.

    Magnetic and XMCD studies of Pr1-xSrxMnO3 manganite films / Y. E. Samoshkina [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 428. - P. 43-49, DOI 10.1016/j.jmmm.2016.12.014. - Cited References: 52. - The work was supported by the Russian Foundation for Basic Research, Project no's. 14-02-01211, 16-32-00209 mol_a, and also the Grant of the President of the Russian Federation no. NSh- 7559.2016.2, and the Ministry of Education and Science of the Russian Federation, Project no. 1362. . - ISSN 0304-8853
   Перевод заглавия: Магнитное и XMCD изучение пленок манганита Pr1−xSrxMnO3
Кл.слова (ненормированные):
Hole-doped manganites -- Thin films -- Magnetic measurements -- Spin-glass behavior -- X-ray magnetic circular dichroism
Аннотация: Magnetic properties of the Pr0.8Sr0.2MnO3 and Pr0.6Sr0.4MnO3 polycrystalline films have been studied using temperature and magnetic field dependences of the static magnetization and X-ray magnetic circular dichroism (XMCD) spectroscopy. For the both compositions, the difference between the temperature dependences of magnetization obtained in the zero fields cooling (ZFC) and field cooling (FC) modes has been revealed. The ZFC curves demonstrate a pronounced maximum at temperature Tm. It is shown that the Tm value dependence on the magnetic field follows the Almeida-Thouless line typical for the classic spin glass, what allows us to assume the possible spin-glass behavior of the films. Effect of the disorder in a direction of the crystallites easy-axis on the difference between FC and ZFC curves has been discussed also. Magnetic field dependences of the sample magnetization are presented by the hysteresis loops with the shape changing upon temperature variation. This behavior has been attributed to the effect of crystallographic anisotropy and Pr ions. The spectra and magnetic field dependences of XMCD at the Pr L2- and Mn K-edges have been studied at 90 K. The magnetic field dependences of the XMCD at the Pr L2-edge had shown Van Vleck paramagnetism from Pr3+ ions. © 2016 Elsevier B.V.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Ural Federal University, Yekaterinburg, Russian Federation
European Synchrotron Radiation Facility (ESRF), BP 220, Grenoble, France
National University of Science and Technology “MISiS”, Moscow, Russian Federation

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Stepanova, E. A.; Neznakhin, D. S.; Ollefs, K.; Andreev, N. V.; Chichkov, V. I.
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15.

Magnetic circular dichroism of Co nanoparticles localized in matrices of various types / Yu. Samoshkina, I. Edelman, H. Chou [et al.] // Materialia. - 2023. - Vol. 28. - Ст. 101759, DOI 10.1016/j.mtla.2023.101759. - Cited References: 28. - This work was supported by the Russian Science Foundation [grant number 21-72-00061]. Electron microscopic studies were carried out in the laboratory of electron microscopy of the Joint Scientific Center of the Siberian Federal University . - ISSN 2589-1529
Кл.слова (ненормированные):
Co nanoparticles -- SiO matrix -- ZnO matrix -- Magneto-optics -- Absorption
Аннотация: Magnetic and magneto-optical properties of cobalt nanoparticles (Co-NPs) dispersed in a transparent dielectric SiO2 and semiconductor ZnO matrices have been investigated. Field and temperature dependences of the samples magnetization showed the typical behavior of an ensemble of superparamagnetic particles with a blocking temperature near and below room temperature. The spectroscopy of magnetic circular dichroism (MCD) in the visible and near-infrared light ranges has revealed a significant difference between the behavior of the Co-NPs and a solid Co film. It has been found that the MCD spectrum shape for the Co-NPs does not depend on the matrix type. The room temperature magneto-optical activity of the Co-NPs in the different matrices has been estimated as an indicator for practical applications.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Department of Physics, National Sun Yat-sen University, 80424 Kaohsiung, Taiwan
Department of Applied Physics, National University of Kaohsiung, 81148 Kaohsiung, Taiwan
Siberian Federal University, Krasnoyarsk, Russia
Institute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg, Russia
Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center RAS, Kazan, Russia

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Chou, Hsiung; Petrov, D. A.; Петров, Дмитрий Анатольевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Neznakhin, Dmitry; Stepanova, Elena; Stepanov, Andrey
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16.

    Magnetic resonance investigation in the polycrystalline Pr0.8Sr0.2MnO3 films: features of the magnetic states above Curie temperature / Yu. E. Samoshkina [et al.] // Mod. Develop. Magn. Resonance : abstracts int. conf. / ed. Salikhov K. M. - Kazan, 2017. - P. 174-175. - Библиогр.: 4
   Перевод заглавия: Исследование магнитного резонанса в поликристаллических пленках Pr0.8Sr0.2MnO3: особенности магнитных состояний выше температуры Кюри

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Доп.точки доступа:
Salikhov K. M. \ed.\; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; "Modern Development of Magnetic Resonance", International conference(2017; 25-29 Sept. ; Kazan)
}
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17.

Magnetic susceptibility and electron magnetic resonance study of Sr doped PrMnO3 thin films / Yu. E. Samoshkina [et al.] // Магнитные материалы. Новые технологии : тез. докл. VII Байкал. Междунар. конф. / Иркутский гос. ун-т. - Иркутск, 2016. - P. 223. - Библиогр.: 5 назв. - The work was supported by the Russian Foundation for Basic Researches, Grant No. 16-32-00209 mol_a and the Grant of the President of the Russian Federation no. NSh- 7559.2016.2 . - ISBN 978-591-345-152-1. - ISBN 978-591-345-152-1

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Доп.точки доступа:
Исхаков, Рауф Садыкович \чл. прогр. ком.\; Iskhakov, R. S.; Аплеснин, Сергей Степанович \чл. прогр. ком.\; Aplesnin, S. S.; Овчинников, Сергей Геннадьевич \чл. прогр. ком.\; Ovchinnikov, S. G.; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В. И.; "Магнитные материалы. Новые технологии", Байкальская международная конференция(7 ; 2016 ; авг. ; 22-26 ; Листвянка, пос. (Иркутская обл.)); "Magnetic materials. New tecnologies", Baikal International Conference(7 ; 2016 ; Aug. ; 22-26 ; Listvyanka, Irkutsk region); Байкальская международная конференция "Магнитные материалы. Новые технологии"(7 ; 2016 ; авг. ; 22-26 ; п. Листвянка, Иркутская обл.); Иркутский государственный университет
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18.

    Magneto-optics of hydrogenated ZnO, ZnO:Co, and ZnO:(Co+Al) films / Yu. E. Samoshkina, M. V. Rautskii, D. S. Neznakhin [et al.] // 2nd International workshop on advanced magnetic oxides (IWAMO-2021) : workshop book. - 2021. - P. 30. - Cited References: 4. - This research was funded by the Russian Science Foundation grant No. 21-72-00061
   Перевод заглавия: Магнитооптика гидрированных пленок ZnO, ZnO:Co и ZnO:(Co+Al)

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Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Petrov, D. A.; Петров, Дмитрий Анатольевич; Chou, H.; International Workshop on Advanced Magnetic Oxides(2 ; 2021 ; Nov. 24-26 November ; Aveiro, Portugal (online)); University of Aveiro; Institute of Nanostructures, Nanomodelling and Nanofabrication
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19.

Particles–matrix bond in ZnCoO:H and ZnCoAlO:H films: Issues of magnetism and spin injection / Yu. E. Samoshkina, M. V. Rautskii, D. S. Neznakhin [et al.] // Materials. - 2023. - Vol. 16, Is. 10. - Ст. 3659, DOI 10.3390/ma16103659. - Cited References: 45. - This work was supported by the Russian Science Foundation [grant number 21-72-00061] . - ISSN 1996-1944
Кл.слова (ненормированные):
thin films -- zinc oxide -- metallic Co nanoparticles -- magnetic properties -- magnetic circular dichroism spectroscopy -- giant magnetoresistance effect
Аннотация: ZnCoO:H and ZnCoAlO:H films were synthesized by radio frequency magnetron sputtering in a (1 − x)Ar + xH2 mixed atmosphere with x = 0.2–0.5. The films contain different amounts of metallic Co particles (from 7.6% and higher) ~4–7 nm in size. The magnetic and magneto-optical (MO) behavior of the films was analyzed in combination with their structural data. The samples exhibit high values of magnetization (up to 377 emu/cm3) and MO response at room temperature. Two situations are considered: (1) the film magnetism is associated only with isolated metal particles and (2) magnetism is present both in the oxide matrix and in metal inclusions. It has been established that the formation mechanism of the magnetic structure of ZnO:Co2+ is due to the spin-polarized conduction electrons of metal particles and zinc vacancies. It was also found that in the presence of two magnetic components in the films, these components are exchange-coupled. In this case, the exchange coupling generates a high spin polarization of the films. The spin-dependent transport properties of the samples have been studied. A high value of the negative magnetoresistance of the films at room temperature (~4%) was found. This behavior was explained in terms of the giant magnetoresistance model. Thus, the ZnCoO:H and ZnCoAlO:H films with high spin polarization can be considered as sources of spin injection.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia
Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, China
Department of Applied Physics, National University of Kaohsiung, Kaohsiung 81148, China

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Neznakhin, D. S.; Stepanova, E. A.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Chou, Hsiung
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20.

Static magnetic properties and X-ray magnetic circular dichroism in Pr1-xSrxMnO3 polycrystalline films / Yu. E. Samoshkina [et al.] // Third Asian school-conference on physics and technology of nanostructured materials (ASCO-NANOMAT 2015) : proceedings. - Vladivostok : Dalnauka, 2015. - Ст. VI.21.16p. - P. 232 . - ISBN 978-5-8044-1556-4
Аннотация: Temperature and fielddependencesof magnetization of Pr0.8Sr0.2MnO3and Pr0.6Sr0.4MnO3manganite films with different thicknesses have been investigated together with the x-ray magnetic circular dichroism (XMCD) at Mn K-and Pr L-edges. Difference between the FC and ZFC temperaturecurves has been explained by the presence of the spin glassstate in the samples,and bythe effect of crystallographic anisotropy.With increasing temperaturethehysteresis loopshad demonstrated the increase in a slope, the reduction of a coercive field and the absence of magnetic saturation at high fields. This behavior has been explained by the ordering of the Pr spins and their effect on the total magnetic properties of the films

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Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Stepanova, E. A.; Степанова Е. А.; Ollefs, K.; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В. И.; Maximova, O. A.; Максимова, Ольга Александровна; Asian School-Conference on Physics and Technology of Nanostructured Materials(3 ; 2015 ; Aug. ; 19-26 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(3 ; 2015 ; авг. ; 19-26 ; Владивосток)
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