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(La0.4Eu0.6)0.7Pb0.3MnO3 single crystal: magnetic and transport properties; electron magnetic resonance measurements / K. G. Patrin [et al.] // Workshop INTAS - Sib. Branch of the RAS Sci. Cooperation on the Res. Project “New Layered 3d-Materials for Spintronics” / chairman G. A. Petrakovskii. - 2007. - P. 15
Аннотация: INTAS (The International Association for the Promotion of Cooperation with Scientists from the New Independent States of the Former Soviet Union) — международная ассоциация по содействию сотрудничеству с учёными новых независимых государств бывшего Советского Союза. Некоммерческая организация, финансировалась главным образом из бюджета Европейского Союза. Являлась крупнейшим фондом, поддерживающим научное сотрудничество между учёными стран бывшего СССР и Европейского Союза с 1993 г. Программы INTAS охватывали широкий круг научно-исследовательских проблем. 22 сентября 2006 года было принято решение о прекращении осуществления программы на основании рекомендации Европейской Комиссии. С 1 апреля 2007 года прекратилось распределение новых грантов.

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Доп.точки доступа:
Petrakovskii, G. A. \chairman\; Петраковский, Герман Антонович; Patrin, K. G.; Патрин, Константин Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович; Petrakovskii, G. A.; Boni, P.; Clementyev, E.; Sablina, K. A.; Саблина, Клара Александровна; Eremin, E. V.; Еремин, Евгений Владимирович; Vasilev, V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; "New Layered 3d-Materials for Spintronics", Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project(2007 ; March 20-23 ; Krasnoyarsk)
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Analysis of the exchange magnetic structure in Pb3Mn7O15 / E. V. Eremin [et al.] // J. Exp. Theor. Phys. - 2017. - Vol. 124, Is. 5. - P. 792-804, DOI 10.1134/S1063776117040112. - Cited References: 16 . - ISSN 1063-7761
Кл.слова (ненормированные):
Crystallography -- Magnetic properties -- Magnetic structure -- Magnetism -- Manganese -- Indirect couplings -- Manganese ions -- Structural and magnetic properties -- Single crystals
Аннотация: The indirect-coupling model is used to analyze the exchange magnetic structure of Pb3Mn7O15 in the hexagonal setting. The ratios of manganese ions Mn4+/Mn3+ in each nonequivalent position are determined. Pb3(Mn0.95Ge0.05)7O15 and Pb3(Mn0.95Ga0.05)7O15 single crystals are grown by the solution–melt method in order to test the validity of the proposed model. The structural and magnetic properties of the single crystals are studied. The magnetic properties of the grown single crystals are compared with those of nominally pure Pb3Mn7O15. © 2017, Pleiades Publishing, Inc.

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Публикация на русском языке Анализ обменной магнитной структуры Pb3Mn7O15 [Текст] / Е. В. Еремин [и др.] // Журн. эксперим. и теор. физ. : Наука, 2017. - Т. 151 Вып. 5. - С. 930-943

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, Russian Federation
Novosibirsk State University, ul. Pirogova 2, Novosibirsk, Russian Federation

Доп.точки доступа:
Eremin, E. V.; Еремин, Евгений Владимирович; Volkov, N. V.; Волков, Никита Валентинович; Sablina, K. A.; Саблина, Клара Александровна; Bayukov, O. A.; Баюков, Олег Артемьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Komarov, V. Y.
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Antiferromagnetism of the cation-ordered warwickite system Mn2-xMgxBO4 (x=0.5, 0.6 and 0.7) / N. V. Kazak, N. A. Belskaya, E. M. Moshkina [et al.] // J. Magn. Magn. Mater. - 2020. - Vol. 507. - Ст. 166820, DOI 10.1016/j.jmmm.2020.166820. - Cited References: 39. - The reported study was funded by the Russian Foundation for Basic Research (no. 20-02-00559), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project. 18-42243007. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
   CRYSTAL-STRUCTURES
   SINGLE-CRYSTALS
   INSIGHTS
   MGFEBO4
Кл.слова (ненормированные):
Warwickites -- Antiferromagnet -- Cation ordering -- Jahn-Teller distortions
Аннотация: X-ray diffraction, heat capacity and magnetic measurements are performed on single crystals of Mn2-xMgxBO4 (x = 0.5, 0.6 and 0.7) with the warwickite structure. The monoclinic symmetry is found for all samples with the space group P21/n. The M1 site is occupied by trivalent Mn ions while the M2 site is occupied by a mixture of divalent Mg and Mn ions. Regular cation and charge distributions are observed, which is unusual for heterometallic warwickites. The local octahedral distortions of M1O6 show the monotonic dependence on the Mg content and are in accordance with the Jahn-Teller distortion. All samples are found to undergo long-range antiferromagnetic ordering with rather low transition temperatures of TN = 16, 14 and 13 K for x = 0.5, 0.6, and 0.7, respectively. The ordering of local octahedral distortions, caused by the strong electron-phonon interaction of the trivalent Mn ions, is proposed to stabilise the cationic ordering and, as a result, the long-range magnetic ordering in the material.

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Держатели документа:
FRC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
RAS, Zavoisky Phys Tech Inst, FRC Kazan Sci Ctr, Kazan, Russia.
Kazan Volga Reg Fed Univ, Kazan, Russia.

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Belskaya, N. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Sofronova, S. N.; Софронова, Светлана Николаевна; Eremina, R. M.; Eremin, E. V.; Еремин, Евгений Владимирович; Muftakhutdinov, A. R.; Cherosov, M. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-02-00559]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science to the research project [18-42243007]
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Bias-current and optically driven transport properties of the hybrid Fe/SiO 2/p-Si structures / N. V. Volkov [et al.] // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P. 526-529, DOI 10.4028/www.scientific.net/SSP.190.526 . - ISBN 1012-0394. - ISBN 9783037854365
Кл.слова (ненормированные):
Hybrid structure -- Mis transition -- Photoelectric effect -- Schottky barrier -- Channel switching -- Comparative analysis -- Electron hole pairs -- Fe films -- Fe layer -- Ferromagnetic films -- Hybrid structure -- Optical effects -- Optical radiations -- Photogeneration -- Planar geometries -- Schottky barriers -- Semiconductor substrate -- Temperature variation -- Critical currents -- Interfaces (materials) -- Magnetic materials -- Photoelectricity -- Schottky barrier diodes -- Silicon -- Switching circuits -- Transport properties
Аннотация: Pronounced optical- and bias-current-sensitive features of the transport properties of a Fe/SiO 2/p-Si hybrid structure in planar geometry at temperature variation are investigated. Comparative analysis of two Fe/SiO 2/p-Si samples, one with a continuous Fe film and the other with two electrodes formed from a Fe layer and separated by a micron gap, shows that these features are due to the MIS transition with a Schottky barrier near the interface between SiO 2 and p- Si. Resistance of such a MIS transition depends exponentially on temperature and bias. In the structure with a continuous ferromagnetic film, the competition between conductivities of the MIS transition and the Fe layer results in the effect of current channel switching between the Fe layer and a semiconductor substrate. Within certain limits, this process can be controlled by a bias current and optical radiation. The mechanism of the optical effect is photogeneration of electron-hole pairs in the semiconductor substrate near its boundary with SiO 2 layer. В© (2012) Trans Tech Publications.

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Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Eremin, E. V.; Еремин, Евгений Владимирович; Tarasov, A. S.; Тарасов, Антон Сергеевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
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Characterization and magnetotransport properties of textured Fe3O4 films / A. S. Tarasov [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. O10.21. - P. 465. - References: 2. - This work was partially supported by RFBR project no. 14-02-00234, the RAS «Far East» Program No 0262-2015-0057 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
magnetite -- texture film -- spin-dependent transport

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Volochaev, M. N.; Волочаев, Михаил Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Korobtsov, V .V.; Коробцов, Владимир Викторович; Balashev, V. V.; Балашев В. В.; Vikulov, V. A.; Solovyov, L. A.; Соловьев, Леонид Александрович; Volkov, N. V.; Волков, Никита Валентинович; 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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Chemical disorder reinforces magnetic order in ludwigite (Ni,Mn)3BO5 with Mn4+ inclusion / S. Sofronova [et al.] // J. Magn. Magn. Mater. - 2018. - Vol. 465. - P. 201-210, DOI 10.1016/j.jmmm.2018.05.068. - Cited References: 31 . - ISSN 0304-8853
Кл.слова (ненормированные):
Oxide -- Oxyborate -- Magnetism -- Crystal growth -- EXAFS
Аннотация: Crystals of ludwigite Ni2.14Mn0.86BO5 were synthesized by flux growth technique. We show in the paper that it contains Mn3+ and Mn4+. A possible mechanism of the manganese valence states stabilization has been proposed. The structural and magnetic characterization of the synthesized samples has been carried out in detail. The cations composition and Mn valence states of the crystal were determined using X-ray diffraction and EXAFS technique. The comparative analysis was carried out between the studied crystal and Ni2MnBO5 synthesized previously. Magnetic susceptibility measurements were carried out. The magnetic transition in the studied composition occurs at the 100 K that is higher than in Ni2MnBO5 although the studied composition is more disordered. The calculations of the exchange integrals in the frameworks of indirect coupling model revealed strong antiferromagnetic interactions. The several magnetic subsystems existence hypothesis was supposed. The possible magnetic structure was suggested from the energies estimation for different ordering variants.

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Держатели документа:
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University Named After Academician M.F. Reshetnev, Krasnoyarsk, Russian Federation
National Research Centre “Kurchatov Institute”, Moscow, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Moshkina, E. M.; Мошкина, Евгения Михайловна; Nazarenko, I. I.; Назаренко, Илья Иванович; Veligzhanin, A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Eremin, E. V.; Еремин, Евгений Владимирович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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Comparing the magnetic and magnetoelectric properties of the SmFe3(BO3)4 ferroborate single crystals grown using different solvents / E. Eremin [et al.] // J. Cryst. Growth. - 2019. - Vol. 518. - P. 1-4, DOI 10.1016/j.jcrysgro.2019.04.017. - Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (RFBR) according to the research projects No. 18-02-00696_a and RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund by project No. 18-42-240011 p_a. . - ISSN 0022-0248. - ISSN 1873-5002

РУБ Crystallography + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
POLARIZATION
FEATURES
Кл.слова (ненормированные):
Impurities -- Growth from solutions -- Single crystal growth -- Borates -- Ferroelectric materials -- Magnetic materials
Аннотация: SmFe3(BO3)4 single crystals have been grown from the bismuth trimolybdate and lithium tungstate-based melt–solutions. Samarium ferroborate single crystals were grown first from the lithium–tungstate flux. The magnetic and magnetoelectric properties of the synthesized crystals have been compared. It is shown that the SmFe3(BO3)4 ferroborate grown from the bismuth trimolybdate-based melt–solution contains impurities of Bi3+ ions (∼5% at.), which replace Sm3+ ions, while the SmFe3(BO3)4, ferroborate grown from the lithium tungstate-based melt–solution contains minor or zero amounts of such impurities. The magnetoelectric and magnetodielectric effects with the Bi3+ admixture appeared 1.5× stronger than in SmFe3(BO3)4; this is probably due to twinning.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Eremin, E. V.; Еремин, Евгений Владимирович; Gudim, I. A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; Smolyakov, D. A.; Смоляков, Дмитрий Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Russian Foundation for Basic Research (RFBR) [18-02-00696_a]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [18-42-240011 p_a]
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Comparision of magnetic properties of TmAl3(BO3)4 and TmAl2,75Sc0,25(BO3)4 crystals / I. A. Gudim [et al.] // Магнитные материалы. Новые технологии : тез. докл. VII Байкал. Междунар. конф. / Иркутский гос. ун-т. - Иркутск, 2016. - P. 97. - Библиогр.: 1 назв. - This study was supported by the Russian Foundation for Basic Research, project no. 13-02-12442, no. 14-02-00307 and no. 15-42-04186 . - 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.; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; "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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Comparison of magnetic properties of GdFe3(BO3)4, ferroborates grown using various solvents / I. A. Gudim, E. V. Eremin, N. V. Mikhashenok, V. R. Titova // Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P. 235-239, DOI 10.21883/PSS.2023.02.55406.505. - Cited References: 18. - This study was supported by grant No. 22-12-20019 provided by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation (https://rscf.ru/project/22-72-00017/) . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
crystal growth -- antiferromagnets -- multferroics
Аннотация: GdFe3(BO3)4, single crystals were grown from melt-solutions based on bismuth trimolybdate and lithium tungstate. Single crystals of gadolinium ferroborate from lithium-tungstate solution-melt were grown for the first time. The magnetic properties of the grown crystals are compared. It is shown that the GdFe3(BO3)4, ferroborate obtained using bismuth solution-melt trimolybdate contains impurities of Bi3+ ions (6% at.), which replace Gd3+ ions. Whereas GdFe3(BO3)4, ferroborate grown from a solution-melt based on lithium tungstate does not seem to contain such uncontrolled impurities.

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Публикация на русском языке Сравнение магнитных свойств ферроборатов GdFe3(BO3)4, выращенных с использованием различных растворителей [Текст] / И. А. Гудим, Е. В. Еремин, Н. В. Михашенок, В. Р. Титова // Физ. тверд. тела. - 2023. - Т. 65 Вып. 2. - С. 243-247

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Titova, V. R.; Титова, Вероника Романовна
}
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10.

    Concentration transition in Cu2(Mn,Ga)BO5 solid solutions / E. Moshkina, E. Eremin, A. Veligzhanin [et al.] // J. Magn. Magn. Mater. - 2023. - Vol. 584. - Ст. 171072, DOI 10.1016/j.jmmm.2023.171072. - Cited References: 27 . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Ludwigite -- Solid solution -- Magnetic phase transition -- Spin glass state
Аннотация: The effects related to the conversion of magnetic structures of a Cu2MnBO5 ferrimagnet to a Cu2GaBO5 antiferromagnet under the Mn3+ → Ga3+ substitution were studied. The properties of four single crystal samples with the gallium concentration x  = 0.04, 0.11, 0.17, 0.25 were examined. The chemical composition and valence state of the samples were determined by X-ray absorption spectroscopy element-sensitive technique. Distribution of the 3d metal ions over crystallographic positions was studied using the first principle calculations by Wien2k program. The evolution of the magnetic properties was investigated by the measurements of the temperature and field dependences of magnetization, dc and ac magnetic susceptibility. In agreement with the previous study of the structure evolution of Cu2Mn1-xGaxBO5 solid solutions, the critical concentration upon a change in the magnetic ordering type was found in the range x  = 0.17–0.25. The non-monotonic behavior of magnetization in terms of the gallium content was found in the concentration range of 0.04–0.17. A complex pattern of magnetic phase transitions belonging to the concentration phase boundary was obtained in the compounds with gallium being within the range x  = 0.17–0.25. One could observe the splitting of the peaks of the real part of ac-susceptibility of the high-temperature phase transition in the Cu2MnBO5-like phase (x = 0.04, 0.11) and that of the low-temperature one at the concentration boundary (x = 0.17, 0.25) with different frequency and orientational dependence. The type and origin of the multiple phase transitions observed in the studied samples were analyzed.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Siberian State University of Science and Technologies, Krasnoyarsk 660037, Russia
National Research Centre “Kurchatov Institute”, Moscow 123182, Russia

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Eremin, E. V.; Еремин, Евгений Владимирович; Veligzhanin, Alexey; Pavlovskiy, M. S.; Павловский, Максим Сергеевич; Sofronova, S. N.; Софронова, Светлана Николаевна; Titova, Veronika; Титова, Вероника Романовна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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