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    A comparative study of γ-Fe2O3 and ε-Fe2O3 nanoparticles arising in borate glasses doped with Fe and Gd / O. S. Ivanova [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2016. - Vol. 9, Is. 4. - P. 459–462 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2016-9-4-459-462. - Cited References: 6. - The work was supported partly by the RFBR, 14-02-01211-a, and by the President of Russia Grant NSh-7559.2016.2. . - ISSN 1997-1397
   Перевод заглавия: Сравнительное изучение γ-Fe2O3 и ϵ-Fe2O3 наночастиц, формирующихся в стекле, допированном железом и гадолинием
Кл.слова (ненормированные):
magnetic nanoparticles -- magnetic circular dichroism -- magnetic measurements -- магнитные наночастицы -- магнитный круговой дихроизм -- магнитные измерения
Аннотация: Formation and properties of the iron oxides γ -Fe2O3 and ϵ-Fe2O3 nanoparticles arising in glasses of basic compositions Ge2O-K2O-Al2O3-B2O3 and K2O-Al2O3-B2O3 doped with different concentrations of Fe2O3 and Gd2O3 and subjected to the additional thermal treatment are studied. The X-ray diffraction, TEM microscopy, magnetooptical effects, and electron spin resonance study allow elucidating the matrix and Gd role in determining the nanoparticle properties.
Изучены свойства наночастиц γ-Fe2O3 и ϵ-Fe2O3, формирующихся в стеклах основного состава Ge2O-K2O-Al2O3-B2O3 и K2O-Al2O3-B2O3, допированных Fe2O3 и Gd2O3 и подвергнутых дополни- тельной термической обработке. Результаты исследования рентгеновской дифракции, электрон- ной микроскопии, магнитооптических эффектов и электронного спинового резонанса позволили объяснить роль матрицы и гадолиния в определении свойств наночастиц.

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Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна

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A comparative study of γ-Fe2O3 and ε-Fe2O3 nanoparticles arising in borate glasses doped with Fe and Gd / O. S. Ivanova [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. P9.11. - P. 397. - References: 1. - The work was supported partly by the RFBR grant No. 14-02-01211 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
magnetic nanoparticles -- magnetic circular dichroism -- magnetic measurements

Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; 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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    Characterization of the iron oxide phases formed during the synthesis of core-shell FexOy@C nanoparticles modified with Ag / D. A. Petrov, C. R. Lin, R. D. Ivantsov [et al.] // Nanotechnology. - 2020. - Vol. 31, Is. 39. - Ст. 395703, DOI 10.1088/1361-6528/ab9af2. - Cited References: 46. - The reported study was funded by Joint Research Project of Russian Foundation for Basic Research № 19-52-52002 and Ministry of Science and Technology, Taiwan MOST № 108-2923-M-153-001-MY3 and № 106-2112-M-153-001-MY3. The samples of series 1 were studied with the support of the Ministry of Science and Higher Education of the Russian Federation within the State assignment FSRC «Crystallography and Photonics» RAS. The electron microscopy investigations were conducted in the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation . - ISSN 1361-6528
   Перевод заглавия: Идентификация фаз оксида железа, формирующихся в процессе синтеза наночастиц FexOy@C с морфологией ядро-оболочка, модифицированных Ag
Кл.слова (ненормированные):
core–shell nanoparticles -- iron oxides -- carbon shell -- Ag nanoparticles
Аннотация: Core–shell FexOy@C nanoparticles (NPs) modified with Ag were studied with x-ray diffraction, transmission electron microscopy, energy dispersive elemental mapping, Mössbauer spectroscopy, static magnetic measurements, and optical magnetic circular dichroism (MCD). FexOy@C NPs synthesized by the pyrolysis process of the mixture of Fe(NO3)3 centerdot 9H2O with oleylamine and oleic acid were added to a heated mixture of oleylamine and AgNO3 in different concentrations. The final product was a mixture of iron oxide crystalline NPs in an amorphous carbon shell and Ag crystalline NPs. The iron oxide NPs were presented by two magnetic phases with extremely close crystal structures: Fe3O4 and γ-Fe2O3. Ag is shown to form crystalline NPs located very close to the iron oxide NPs. An assumption is made about the formation of hybrid FexOy@C-Ag NPs. Correlations were obtained between the Ag concentration in the fabricated samples, their magnetic properties and the MCD spectrum shape. Introducing Ag led to a approximately linear decrease of the NPs saturation magnetization depending upon the Ag concentration, it also resulted into the MCD spectrum shift to the lower light wave energies. MCD was also studied for the Fe3O4@C NPs synthesized earlier with the same one-step process using different heat treatment temperatures, and MCD spectra were compared for two series of NPs. A possible contribution of the surface plasmon excitation in Ag NPs to the MCD spectrum of the FexOy@C-Ag NPs is discussed.

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Держатели документа:
Kirensky Institute of Physics, FRC, KSC, SB RAS, Krasnoyarsk 660036, Russia
National Pingtung University, Pingtung City, Pingtung County 90003, Taiwan
Siberian Federal University, Svobodny Av., 79, Krasnoyarsk 660041, Russia
Shubnikov Institute of Crystallography of FSRC 'Crystallography and Photonics' RAS, Moscow 119333, Russia

Доп.точки доступа:
Petrov, D. A.; Петров, Дмитрий Анатольевич; Lin, C. R.; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Tseng, Y. T.; Lin, E. S.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Baskakov, A. O.; Starchikov, S. S.; Lyubutin, I. S.
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    Chemically synthesized Cu1-xFexCr2Se4 nanoparticles. Morphology and magnetic properties / C. R. Lin [et al.] // 20th Int. Conf. on Magnetism (ICM-2015) : book of abstracts. - 2015. - Ст. TU.F-P88
   Перевод заглавия: Химически синтезированные наночастицы Cu1-xFexCr2Se4. Морфология и магнитные свойства

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Доп.точки доступа:
Lin, C. R.; Chen, C. C.; Li, O.; Hsu, Hua-Shu; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Edelman, I. S.; Эдельман, Ирина Самсоновна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; International Conference on Magnetism(20 ; 2015 ; Jul ; 5-10 ; Barselona, Spain)
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Co nanoparticles in Si oxides: magnetoopical spectra [Text] / Edelman I., Ivantsov R. [и др.] // Moscow Int. Symp. on Magnet. (MISM-2008) : June 20-25, 2008, Moscow : book of abstract. - 2008. - p. 310. - Библиогр.: 1. - Support of RFBR (07-02-93174, 07-03-00320) is acknowledged

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Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Vorotynova, O.V.; Petrov, D. A.; Seredkin, V. A.; Середкин, Виталий Александрович; Valeev, V. F.; Khaibullin, R. I.; Stepanov, A.; Moscow International Symposium on Magnetism(4 ; 2008 ; Jun. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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Core-shell iron oxide-carbon nanoparticles modified with Ag. synthesis, morphology, magnetic properties / D. A. Petrov, R. D. Ivantsov, S. M. Zharkov [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. J.P18. - P. 220-221. - Cited References: 2. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project No. 18-42-243021 and by Joint Research Project of Russian Foundation for Basic Research and Ministry of Science and Technology, Taiwan MOST No. 19-52-52002 . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
National Pingtung University, Pingtung County, Taiwan

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; Petrov, D. A.; Петров, Дмитрий Анатольевич; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Lin, C.-R.; Tseng, Y.-T.; 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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Effect of cobalt concentration on the magnetic properties of the Co1–xMgxFe2O4 nanocrystals / O. S. Ivanova, I. S. Edelman, S. G. Ovchinnikov [et al.] // JETP Lett. - 2024. - Vol. 119, Is. 2. - P. 104-110, DOI 10.1134/S0021364023603457. - Cited References: 26. - The research was carried out at the expense of the Russian Science Foundation Grant # 23-22-10025, https://rscf.ru/project/23-22-10025/, Krasnoyarsk Regional Science Foundation . - ISSN 0021-3640. - ISSN 1090-6487
Аннотация: Nanoparticles of Co1–xMgxFe2O4 with x equal to 0, 0.2, 0.4, 0.6, 0.8 and 1.0 have been synthesized. For all values of x, they are nanocrystals with a cobalt ferrite structure and an average linear size (56 ± 3) nm. Based on the analysis of the Mossbauer effect spectra, the Co2+ ions were shown to occupy only octahedral positions at all values of x. The experimentally obtained dependence of the nanoparticles magnetization on x corresponds to the dependence calculated using the Mossbauer effect data, except for the sample with x = 1.0. The effective magnetic anisotropy constant estimated for 0 K from the analysis of the coercive force temperature dependences decreases from 5.27 × 106 at x = 0 to 1.29 × 106 erg/cm3 at x = 0.8 and drops sharply to 4 × 104 erg/cm3 at x = 1.0

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Публикация на русском языке Влияние концентрации кобальта на магнитные свойства нанокристаллов семейства Co1–xMgxFe2O4 [Текст] / О. С. Иванова, И. С. Эдельман, С. Г. Овчинников [и др.]. - 7 с. // Письма в ЖЭТФ. - 2024. - Т. 119 Вып. 2. - С. 111-117

Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Amity University Haryana, 122413, Gurugram, Haryana, India

Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Thakur, A.; Thakur, P.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич
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Effect of gadolinium on magnetic circular dichroism and electron magnetic resonance of ε-Fe2O3 nanoparticles formed in borate glasses / I. Edelman [et al.] // J. Non-Cryst. Solids. - 2019. - Vol. 506. - P. 68-79, DOI 10.1016/j.jnoncrysol.2018.12.006. - Cited References: 81. - The work is supported by Russian Academy of Sciences in the frame of the Project № 0356-2017-0030. . - ISSN 0022-3093
Кл.слова (ненормированные):
Iron oxides -- ε-Fe2O3 -- Borate glasses -- Nanoparticles -- Magnetic circular dichroism -- Electron magnetic resonance
Аннотация: A remarkable characteristic of borate glasses is the ability of forming magnetic nanoparticles at low doping with transition element oxides. We have studied structure and magnetic properties of iron oxide nanoparticles formed in borate glasses, in particular, concentration and temperature dependences of magnetic circular dichroism (MCD) and electron magnetic resonance (EMR) spectra. A series of glasses of molar composition 22.5K2O-22.5Al2O3–55B2O3 doped with 1.5 mass % of Fe2O3 and different contents of Gd2O3 from 0.1 to 1.0 mass % was prepared using a conventional melt quenching technique and subjected to an additional thermal treatment. The whole set of results allows to identify the predominant magnetic phase in these glasses as ε-Fe2O3 nanoparticles, with a considerable part of iron ions substituted by gadolinium. Analysis and computer simulations of the EMR spectra allow separating the contribution of electron paramagnetic resonance of diluted iron ions and together with the temperature dependences of magnetization demonstrate a superparamagnetic character of the nanoparticle magnetism.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
LOMA, UMR 5798 Universite de Bordeaux-CNRS, Talence cedex, 33405, France
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch of RAS, Novosibirsk, 630090, Russian Federation
NRC “Kurchatov Institute”, Moscow, 123182, Russian Federation
Vavilov State Optical Institute, St.-Petersburg, 199053, Russian Federation

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Kliava, J.; Ivanova, O. S.; Иванова, Оксана Станиславовна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zaikovskii, V.; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Zubavichus, Y.; Stepanov, S.
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Effect of surfactants on the structure, phase composition, and magnetic properties of FexSy nanoparticles synthesized by thermal decomposition / R. D. Ivantsov, C.-R. Lin, Y.-Z. Chen [et al.] // Nanobiotechnol. Rep. - 2022. - Vol. 17, Is. 3. - P. 336-344, DOI 10.1134/S2635167622030089. - Cited References: 27. - This study was supported by the Russian Foundation for Basic Research with Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, the research project no. 19-42-240005: “Features of the Electronic Structure, Magnetic Properties, and Optical Excitations in Nanocrystals of Multifunctional Magnetic Chalcogenides Fe3S4 and FeSe” and the Russian Foundation for Basic Research and the Ministry of Science and Technology of Taiwan, joint projects nos. 19-52-52002 and 109-2112-M-153-003 and 108-2923-M-153-001-MY3. - The electron-microscopy study was carried out at the Laboratory of Electron Microscopy of the Center for Collective Use of the Siberian Federal University within the state assignment of the Ministry of Science and Higher Education of the Russian Federation (research code FSRZ-2020-0011). The magnetic measurements were carried out on a vibrating sample magnetometer at the Krasnoyarsk Regional Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences . - ISSN 2635-1676
Кл.слова (ненормированные):
Agglomeration -- Crystal impurities -- Fourier transform infrared spectroscopy -- High resolution transmission electron microscopy -- Magnetic properties -- Magnetite -- Magnetization -- Nanomagnetics -- Sulfur compounds -- Synthesis (chemical) -- Thermogravimetric analysis -- Thermolysis -- Electron diffraction analysis -- Greigites -- Hexadecylamine -- Inverse spinel structures -- Iron sulfide -- Isostructural -- Octadecyl amine -- Organic shells -- Structures phase -- Synthesised -- Surface active agents
Аннотация: The effect of surfactants on the structure, morphology, and magnetic properties of FexSy iron-sulfide nanoparticles synthesized by thermal decomposition is studied. Oleylamine, hexadecylamine, and octadecylamine are used as surfactants. It is established by X-ray and electron-diffraction analysis combined with Mossbauer spectroscopy that, in samples 1 and 2 prepared using oleylamine and hexadecylamine, respectively, the Fe3S4 greigite phase dominates, with an inverse spinel structure isostructural to the iron oxide Fe3O4 magnetite with minor Fe9S11 impurities. Deviations in the distribution of iron cations over the tetrahedral and octahedral sites relative to the bulk greigite crystals are observed. The nanoparticles synthesized using octadecylamine (sample 3) are found to be multiphase with a greigite fraction of ~20%. In all three cases, as showed the results of transmission electron microscopy and Fourier transform infrared spectroscopy together with thermogravimetry analysis, the magnetic nanoparticles have an organic shell chemically bonded to their magnetic core, which prevents the agglomeration of the particles. This shell is much more massive in samples 2 and 3. The magnetization values for samples 1 and 2 are similar to those of greigite nanoparticles reported in publications, while the magnetization of sample 3 is several times lower, in accordance with the greigite fraction in it. The combination of fairly high magnetization with a massive organic shell allows one to consider hexadecylamine to be a promising surfactant for the synthesis of iron-sulfide nanoparticles protected from external impact and agglomeration.

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Публикация на русском языке Влияние ПАВ на структуру, фазовый состав и магнитные свойства наночастиц FexSy, полученных методом термического разложения [Текст] / Р. Д. Иванцов, Ч. Р. Лин, Ю. Ж. Чэнь [и др.] // Рос. нанотехнол. - 2022. - Т. 17 № 3. - С. 358-367

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Department of Applied Physics, National Pingtung University, Pingtung City, 90003, Taiwan
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Lin, C. -R.; Chen, Y. -Z.; Ivanova, O. S.; Иванова, Оксана Станиславовна; Altunin, R. R.; Knyazev, Yu. V.; Князев, Юрий Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Shestakov, N. P.; Шестаков, Николай Петрович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Edelman, I. S.; Эдельман, Ирина Самсоновна
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10.

    Effects of processing parameters on the morphology, structure, and magnetic properties of Cu1-xFexCr2Se4 nanoparticles synthesized with chemical methods / R. D. Ivantsov [et al.] // J. Alloys Compd. - 2015. - Vol. 650. - P. 887-895, DOI 10.1016/j.jallcom.2015.08.017. - Cited References: 36. - The paper was partially supported by the Russian Foundation for Basic Research (grant #14-02-01211), by the President of Russia (grant #NSh-2886.2014.2), and by the Ministry of Education and Science of the Russian Federation (grant #2014/71/1763 in the framework of the state assignment for the Siberian Federal University for 2014-2016). We also thank the Ministry of Science and Technology of Taiwan and the Siberian Branch of RAS (MOST 102-2112-M-153 -002 -MY3) for financial support. . - ISSN 0925-8388
   Перевод заглавия: Влияние параметров получения на морфологию, структуру и магнитные свойства наночастиц Cu1-xFexCr2Se4, синтезированных химическими методами

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
CuCr2Se4 SINGLE-CRYSTALS
   TRANSPORT-PROPERTIES
   CHROMIUM SPINELS
   NANOSTRUCTURES
   DIFFRACTION
   Li
Кл.слова (ненормированные):
Copper selenide -- Magnetic nanoparticles -- Visible magnetic circular dichroism
Аннотация: Cu1-xFexCr2Se4 nanoparticles with x = 0, 0.2, and 0.4 were synthesized via thermal decomposition of metal nitrate or chloride salts and selenium powder using different precursor compositions and processing details. Single crystalline nano-belts or nano-rods coexist in the synthesized powder samples with hexagon-shaped plates in dependence on the precursor composition. The belts gathered into conglomerates forming "hierarchical" particles. Visible magnetic circular dichroism (MCD) of Cu1-xFexCr2Se4 nanoparticles embedded into a transparent matrix was investigated for the first time. The similarity of the MCD spectra of all samples showed the similarity of the nanoparticles electronic structure independent of their morphology. Basing on the MCD spectral maxima characteristics, electron transitions from the ground to the excited states were identified with the help of the conventional band theory and the multi-electron approach. © 2015 Elsevier B.V.

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National Pingtung University, Pingtung City, Pingtung County, Taiwan

Доп.точки доступа:
Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Zharkov, S. M.; Жарков, Сергей Михайлович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Petrov, D. A.; Петров, Дмитрий Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lin, C.-R.; Li, O.; Tseng, Y.-T.
}
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11.

    Electron spin resonance in Cu1−xFexCr2Se4 nanoparticles synthesized with the thermal decomposition method / I. S. Edelman [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 436. - P. 21-30, DOI 10.1016/j.jmmm.2017.04.006. - Cited References: 34. - The paper was partially supported by the President of Russia (Grant #NSh-7559.2016.2). We also thank the Ministry of Science and Technology of Taiwan, Taiwan, and the Siberian Branch of RAS, Russian Federation (MOST 102-2112-M-153-002-MY3) for the financial support. . - ISSN 0304-8853
   Перевод заглавия: Электронный парамагнитный резонанс в наночастицах Cu1-xFexCr2Se4, синтезированных методом термического разложения
Кл.слова (ненормированные):
Anisotropy -- Association reactions -- Chromium compounds -- Decomposition -- Electrospinning -- Inorganic compounds -- Magnetic moments -- Magnetocrystalline anisotropy -- Nanoparticles -- Plates (structural components) -- Resonance -- Spin dynamics -- Synthesis (chemical) -- Temperature distribution -- Thermolysis -- Inter-particle interaction -- Nanoparticle (NPs) -- Resonance spectrum -- Single-crystalline -- Temperature behavior -- Temperature decrease -- Temperature dependence -- Thermal decomposition methods -- Electron spin resonance spectroscopy
Аннотация: IIn this paper, we present a study of the electron spin resonance (ESR) of nanoparticles (NPs) of Cu1−xFexCr2Se4 chalcogenides with x = 0, 0.2, and 0.4. NPs were synthesized via the thermal decomposition of metal chloride salts and selenium powder in a high-temperature organic solvent. According to the XRD and HRTEM data, the NPs were single crystalline nearly hexagonal plates with the structure close to CuCr2Se4 (Fd-3m, a = 10.337 Å). For x = 0 and 0.2, the NPs tend to form long stacks consisting of the plates “face to face” attached to each other due to the magnetostatic interparticle interaction. Only separate NPs were observed in the case of x = 0.4. Peculiarities were revealed in the ESR temperature behavior for the NPs with x = 0 and 0.2 consistent with the features in the temperature dependences of the NPs magnetization. The non-monotonous dependence of the resonance field Hres on the temperature with a kink near 130 K and the energy gap in the resonance spectrum depending on the type of nanoparticle compacting are the distinct peculiarities. One of the main factors is discussed in order to explain the peculiarities: the coexistence of two types of anisotropy in the Cu1−xFexCr2Se4 NPs, in-plain shape anisotropy and magnetocrystalline anisotropy with four easy axes, which increases strongly with the temperature decrease.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National Pingtung University, Pingtung City, Pingtung County, Taiwan

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Zharkov, S. M.; Жарков, Сергей Михайлович; Pankrats, A. I.; Панкрац, Анатолий Иванович; Vorotynov, A. M.; Воротынов, Александр Михайлович; Tugarinov, V. I.; Тугаринов, Василий Иванович; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Petrov, D. A.; Петров, Дмитрий Анатольевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Lin, C. -R.; Chen, C. -C.; Tseng, Y. -T.; Hsu, H. -S.
}
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12.

EMR spectra of borat glasses containing two types of transition ion simultaneously [Text] / Kliava J., Marbeuf A., Edelman I., Ivanova O., Petrakovskaja E., Ivantsov R. // EUROMAR 2008 Conference : St.Peterbsburg, 2008, [6-11 July]. - 2008. - p. 221

Доп.точки доступа:
Kliava, J.; Marbeuf, A.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivanova, O. S.; Иванова, Оксана Станиславовна; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; "Магнитный резонанс для будущего", Международный конгресс(2008 ; июль ; Санкт-Петербург); "Euromar", International Conference(2008 ; Jul. ; St.-Peterburg)
}
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13.

    Endorsing a hidden plasmonic mode for enhancement of LSPR sensing performance in evolved metal–insulator geometry using an unsupervised machine learning algorithm / N. Bhalla, A. Thakur, I. S. Edelman, R. D. Ivantsov // ACS Phys. Chem. Au. - 2022. - Vol. 2, Is. 6. - P. 459-467, DOI 10.1021/acsphyschemau.2c00033. - Cited References: 35 . - ISSN 2694-2445
   Перевод заглавия: Обнаружение скрытой плазмонной моды для усиления локального поверхностного плазмонного резонанса (ЛППР). Увеличение чувствительности усовершенствованной геометрии металл-изолятор с использованием самообучающегося машинного алгоритма
Дескрипторы: LSPR -- Plasmonics -- PCA -- Deconvolution -- Sensors
Аннотация: Large-area nanoplasmonic structures with pillared metal–insulator geometry, also called nanomushrooms (NM), consist of an active spherical-shaped plasmonic material such as gold as its cap and silicon dioxide as its stem. NM is a geometry which evolves from its precursor, nanoislands (NI) consisting of aforementioned spherical structures on flat silicon dioxide substrates, via selective physical or chemical etching of the silicon dioxide. The NM geometry is well-known to provide enhanced localized surface plasmon resonance (LSPR) sensitivity in biosensing applications as compared to NI. However, precise optical phenomenon behind this enhancement is unknown and often associated with the existence of electric fields in the large fraction of the spatial region between the pillars of NM, usually accessible by the biomolecules. Here, we uncover the association of LSPR enhancement in such geometries with a hidden plasmonic mode by conducting magneto-optics measurements and by deconvoluting the absorbance spectra obtained during the local refractive index change of the NM and NI geometries. By the virtue of principal component analysis, an unsupervised machine learning technique, we observe an explicit relationship between the deconvoluted modes of LSPR, the differential absorption of left and right circular polarized light, and the refractive index sensitivity of the LSPR sensor. Our findings may lead to the development of new approaches to extract unknown properties of plasmonic materials or establish new fundamental relationships between less understood photonic properties of nanomaterials.

https://doi.org/10.1021/acsphyschemau.2c00033
Держатели документа:
Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, Jordanstown, Shore Road, Newtownabbey, Northern Ireland BT37 0QB, United Kingdom
Healthcare Technology Hub, Ulster University, Jordanstown, Shore Road, Newtownabbey, Northern Ireland BT37 0QB, United Kingdom
Amity Institute of Nanotechnology, Amity University Haryana, Gurugram, Haryana 122413, India
Kirensky Institute of Physics, FRC KSC Siberian Branch of Russian Academy of Sciences, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Bhalla, Nikhil; Thakur, Atul; Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич
}
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14.

Ensembles of γ-Fe2O3 nanoparticles formed during devitrification of borate glasses / O. S. Ivanova [et al.] // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 173-178, DOI 10.4028/www.scientific.net/SSP.215.173. - Cited References: 16 . - ISSN 978-30383. - ISSN 1662-9779
Кл.слова (ненормированные):
Magnetic nanoparticles -- Magneto-optical properties
Аннотация: Structural, magnetic and magneto-optical properties of borate glasses co-doped with Fe and the lager radius ions are presented. Maghemite, ?-Fe2O3, nanoparticles arise in the glasses as a result of their thermal treatment in different regimes. Magnetization FC and ZFC temperature dependences demonstrate the superparamagnetic behavior of the particles with the blocking temperature below the room temperature. The EMR spectra measurements revealed a significant anisotropy with a large contribution of the nanoparticles' surface anisotropy. The FR maximum centered near 700 nm is a characteristic feature of the investigated glasses. © (2014) Trans Tech Publications, Switzerland.

Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Ivanova, O. S.; Иванова, Оксана Станиславовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Trofimova, N. N.; Zubavichus, Y. V.; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)
}
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15.

Ensembles OF[[d]]γ[[/d]]-Fe[[d]]2[[/d]]O[[d]]3[[/d]] nanoparticles formed during devitrification of borate glasses [Текст] / O. S. Ivanova [и др.] // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P138 . - ISBN 978-5-7444-3124-2

Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Trofimova, N. N.; Трофимова, Н. Н.; Zubavichus, Y. V.; Зубавичус, Я. В.; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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16.

    Evolution of morphology and magnetic properties of α-Fe2−xCrxO3 nanoparticles in dependence on Cr concentration / I. S. Edelman, R. D. Ivantsov, C.-R. Lin [et al.] // J. Magn. Magn. Mater. - 2022. - Vol. 564. - Ст. 170101, DOI 10.1016/j.jmmm.2022.170101. - Cited References: 69. - The work was supported financially by the Russian Foundation for Basic Research, Grant № 19-52-52002 and Ministry of Science and Technology of Taiwan, Grants MOST № 108-2923-M-153-001-MY3, № 110-2811-M-153-001 and № 110-2112-M-153-005. The support was obtained also from the Joint Scientific Center of the Siberian Federal University supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation, where the electron microscopy studies were carried out . - ISSN 0304-8853
   Перевод заглавия: Эволюция морфологии и магнитных свойств наночастиц α-Fe2−xCrxO3 в зависимости от концентрации Cr
Кл.слова (ненормированные):
Hematite -- α-Fe2−xCrxO3 -- Morin transition -- Nanorods -- Magnetization -- Magnetic circular dichroism
Аннотация: Hematite, α-Fe2O3, one of the most widely studied magnetic compounds known to mankind since ancient times, has amazing properties and continues to puzzle researchers to this day. In this work, we found exceptionally strong changes in the morphology and magnetic properties of hematite nanoparticles upon doping with rather low concentrations of chromium. Nanoparticles α-Fe2−xCrxO3 with x varied from zero to 0.15 were prepared by solvothermal method using FeCl3·6H2O, CrCl3·6H2O, and 1,2-diaminopropane, (CH2)3(NH2)2, as precursors and temperature 180 °C for 6 h. The X-ray diffraction data showed the presence of only one crystal phase α-Fe2O3 for all x meanings with growing average crystalline size as the x increases. For the parent α-Fe2O3 powdered samples, the transmission electron microscopy revealed very long narrow nanorods with rounded ends that transform into spindles of increasing volume and cross section diameter as the Cr concentration increases. Vibrating sample magnetometry (VSM) and magnetic circular dichroism (MCD) study of the nanoparticles behavior in dependences on temperature and magnetic field revealed many unusual peculiarities. Among them there are strong increase of NPs magnetization with x increase (usually opposite picture is observed), the Morin transition temperature TM dependence on magnetic field, VSM sees the Morin transition in samples with small x only while MCD – in all samples, magnetization field dependences also are different when measured with VSM and MCD, and so on. Qualitative considerations were proposed to explain the observed phenomena.

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Applied Physics, National Pingtung University, Pingtung City, 90003, Taiwan
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Lin, C. -R.; Zharkov, S. M.; Жарков, Сергей Михайлович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zeer, G. M.; Chen, Y. -Z.; Spivakov, A. A.
}
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17.

Experimental study of iron sulfide Fe[[d]]3[[/d]]S[[d]]4[[/d]] nanoparticles synthesized by the polyolmediated process / Chun-Rong Lin [и др.] // Новое в магнетизме и магнитных материалах : сборник трудов XXII международной конференции. - Астрахань, 2012. - С. 470-472

Доп.точки доступа:
Chun-Rong Lin; Shin-Zong Lu; Yu-Jhan Siao; Lyubutin, I.S.; Ivantsov, R.D.; Иванцов, Руслан Дмитриевич; Starchikov, S.S.; Funtov, K.O.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Edelman, I.S.; Эдельман, Ирина Самсоновна; Российская академия наук; Научный совет по физике конденсированных сред РАН; Институт физики твердого тела РАН; Московский государственный университет им. М.В. Ломоносова; Астраханский государственный университет ; "Новое в магнетизме и магнитных материалах", международная конференция (22 ; 2012 ; сент. ; 17-23 ; Астрахань)
}
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18.

Faraday effect in nanogranular Co-Sm-O films / V. S. Zhigalov [et al.] // Phys. Solid State. - 2005. - Vol. 47, Is. 6. - P. 1129-1133, DOI 10.1134/1.1946868. - Cited References: 13 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ROTATION
CO/SIO2
Аннотация: The Faraday effect (FE) was studied in Co-Sm-O composite films consisting of nanoparticles of metallic cobalt embedded in a samarium oxide dielectric matrix. The volume of the magnetic phase was similar to 60%. The FE spectral dependence for the condensates studied revealed a substantial change as compared to that for bulk cobalt samples, as well as for the films of nanocrystalline Co and CoSm films prepared in this study. An enhancement of the FE was also observed in the short-wavelength part of the optical spectrum. (c) 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zhigalov, V. S.; Жигалов, Виктор Степанович; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Seredkin, V. A.; Середкин, Виталий Александрович; Frolov, G. I.; Фролов, Георгий Иванович; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич
}
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19.

Fe3S4 and Fe3O4 magnetic nanocrystals: magnetooptical and Mössbauer spectroscopy study / C-R Lin [et al.] // Mater. Research Express. - 2014. - Vol. 1, Is. 2. - P. 025033DOI 10.1088/2053-1591/1/2/025033. - We thank the National Science Council of Taiwan (NSC 100-2923-M-153-001-MY3 and NSC 102-2112-M-153-002-MY3) for financial support. Support by the Russian Foundation for Basic Research (Grants #14-12-00848 and 14-02-0121) is acknowledged. This work was also supported by the Russian Federation President Grant NSh-2886.2014.2.
Кл.слова (ненормированные):
iron sulfide Fe3S4 -- iron oxide Fe3O4 -- magnetic nanoparticles -- Mössbauer spectroscopy -- magnetic circular dichroism -- ab-initio band structure -- calculations
Аннотация: Iron oxide magnetite (Fe3O4) should be a reasonable analog for conception and understanding of the magnetic properties of iron sulfide greigite (Fe3S4)—one of the most required magnetic materials having numerous applications but being far from the complete understanding now. We present here a comparative study of the Mössbauer effect (ME) and the magnetic circular dichroism (MCD) spectroscopy of Fe3O4 and Fe3S4 nanoparticles. The ME spectrum parameters of Fe3S4 are shown to distinguish strongly from that of Fe3O4, and the MCD spectrum shapes are shown to be absolutely different for two compounds. To clarify the origin of the Fe3S4 MCD spectrum we have performed ab initio band structure calculations and identified the MCD spectrum features with the transitions between calculated energy states.

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Держатели документа:
Department of Applied Physics, National Pintung University of Education, Pintung 90003, Taiwan
L.V. Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
University of Nevada, Reno, NV 89557, USA
Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow 119333, Russia

Доп.точки доступа:
Lin, C.-R.; Tseng, Y.-T.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Fedorov, A. S.; Федоров, Александр Семенович; Kuzubov, A. A.; Кузубов, Александр Александрович; Fedorov, D. A.; Федоров, Дмитрий Александрович; Starchikov, S. S.; Lyubutin, I. S.
}
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20.

    Features of magnetic and magneto-optical properties of lanthanum manganite microparticles / R. D. Ivantsov, M. M. Mikhailov, I. S. Edelman, G. Yu. Yurkin // The Sixth Asian school-conference on physics and technology of nanostructured materials : Proceedings. - VLadivostok, 2022. - Ст. III.o.06. - P. 128. - Cited References: 1 . - ISBN 987-5-8044-1716-2
   Перевод заглавия: Особенности магнитных и магнитооптических свойств микрочастиц манганита лантана
Аннотация: For La1-xSrxMnO3 powders prepared by the solid-phase reaction method using various thermal regimes and x values, the temperature dependences of magnetization, circular magnetic dichroism (MCD), and diffuse reflectance spectra were studied. The powders synthesis at temperatures of 800–900 °C for 2 h leads to the formation of a multiphase state. The higher temperatures and duration of synthesis lead to the formation of two predominant magnetic phases with the Curie temperature (TC) of about 250 and 360 K. Correlation is established between magnetic states of the powder and the shape of the diffuse reflection spectra. The strong red shift of the MCD spectrum for the La1-xSrxMnO3 powder is revealed comparing to the MCD spectra of La1-xSrxMnO3 films available in literature.

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS
Tomsk State University of Control System & Radioelectronics
Siberian Federal University

Доп.точки доступа:
Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Mikhailov, M. M.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Asian School-Conference on Physics and Technology of Nanostructured Materials(6 ; 2022 ; Apr. 25-29 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(6 ; 2022 ; 25-29 апр. ; Владивосток)
}
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