Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=Mössbauer spectroscopy<.>)

Общее количество найденных документов : 5
Показаны документы с 1 по 5

    Structure and magnetic properties of biogenic ferrihydrite nanoparticles doped with gadolinium / S. V. Stolyar [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2013. - Vol. 6, Is. 3. - P. 358-365 ; Журн. СФУ. Сер. "Математика и физика" . - ISSN 1997-1397
   Перевод заглавия: Структура и магнитные свойства биогенных наночастиц ферригидрита, легированных гадолинием
Кл.слова (ненормированные):
ferrihydrite nanoparticle -- bacterial culture Klebsiela oxytoca -- Mössbauer spectroscopy -- gadolinium doping
Аннотация: Bacterial culture Klebsiella oxytoca was grown in a Lovley medium at various concentrations of gadolinium salt. Biogenic magnetic nanoparticles of ferrihydrite were investigated by Mossbauer spectroscopy and magnetization curves were obtained. The results of structural studies showed that iron Fe(5) takes new position when cultivating is carried out in medium with high concentrations of gadolinium. It was found that gadolinium is fit into the crystal structure of ferrihydrite. These results are consistent with the analysis of the magnetization curves.

Смотреть статью,
Читать в сети ИФ

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Bayukov, O. A.; Баюков, Олег Артемьевич; Ladygina, V. P.; Ischenko, L. A.; Iskhakov, R. S.; Исхаков, Рауф Садыкович

}
Найти похожие

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.

Смотреть статью,
Читать в сети ИФ
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.
}
Найти похожие

Cation Distribution in the Composite Materials of the CaFe2O4-α-Fe2O3 Series / Y. V. Knyazev [et al.] // J. Struct. Chem. - 2019. - Vol. 60, Is. 5. - P. 763-771, DOI 10.1134/S0022476619050081. - Cited References: 25. - The study was performed with the financial support of the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Krai, the Krasnoyarsk Regional Science Foundation within the project No. 18-42-243011 "The effect of the composition and the defective structure of CaFe2O4 based "core-shell" composite materials on their electronic and catalytic properties" and the UMNIK program. . - ISSN 0022-4766. - ISSN 1573-8779

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
PD/P-TYPE CAFE2O4
OXYGEN
CONDUCTIVITY
Кл.слова (ненормированные):
solid-phase synthesis -- scanning electron microscopy -- Mössbauer spectroscopy -- cation vacancies
Аннотация: Structured composite materials CaFe2O4-α-Fe2O3 (α-Fe2O3 content is 2–82 wt.%) are obtained with the method of solid-phase synthesis at 1000 °C. The phase composition of the samples is studied using powder X-ray diffraction. It is shown that the content of CaFe2O4 and α-Fe2O3 phases changes linearly, depending on the composition of the starting material. The scanning electron microscopy data indicate the formation of a two-phase system α-Fe2O3-CaFe2O4. The Mössbauer spectroscopy data at room temperature testify the formation of cationic iron vacancies in the CaFe2O4 crystal structure in the absence of α-Fe2O3 structural defects. Cationic vacancies can be formed during the synthesis in the atmosphere of air.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ

Публикация на русском языке Особенности катионного распределения в композиционных материалах ряда СaFe2O4—α-Fe2O3 [Текст] / Ю. В. Князев [и др.] // Журн. структ. химии. - 2019. - Т. 60 № 5. - С. 796-805

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Fed Krasnoyarsk Res Ctr, Krasnoyarsk, Russia.
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Fed Krasnoyarsk Res Ctr, Krasnoyarsk, Russia.

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Shishkina, N. N.; Bayukov, O. A.; Баюков, Олег Артемьевич; Kirik, N. P.; Solovyov, L. A.; Zhizhaev, A. M.; Rabchevsky, E. V.; Anshits, A. G.; Russian Foundation for Basic Research; Government of the Krasnoyarsk Krai; Krasnoyarsk Regional Science Foundation [18-42-243011]; UMNIK program
}
Найти похожие

Structural and electron transport properties of CaFe2O4 synthesized in air and in helium atmosphere / Yu. V. Knyazev [et al.] // J. Alloys Compd. - 2020. - Vol. 820. - Ст. 153073, DOI 10.1016/j.jallcom.2019.153073. - Cited References: 37. - The reported study was partially supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (grant #18-42-243011) and the UMNIK Program. . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
CaFe2O4 -- Mössbauer spectroscopy -- EXAFS/XANES -- XPS -- Conductivity measurements -- Activation energy
Аннотация: The samples with the CaFe2O4-type crystal structure were obtained by the solid-state reaction method at 1000 °C in the air and the helium atmosphere for the first time. We investigated the modification of the structural and electronic properties of the obtained samples. Mössbauer, XAFS-, XPS-spectroscopies, and dc-, ac-conductivity measurements were carried out. Mössbauer and XAFS-spectroscopies showed that the local environment of Fe and Ca cations does not change in the case of the inert atmosphere synthesis. Nevertheless, a sharp six-order increase in the electrical resistance observed at room temperature for the sample obtained in the in the helium atmosphere. Moreover, calculated from dc-conductivity data activation energy rises from 0.327 for the air-synthesized sample to 0.585 eV for helium-obtained one. This behavior indicates significant modification of in-band-gap energy structure, which correlated with thermally activated charge carriers. Our ac-conductivity measurements in the frequency range of 1 kHz–2 MHz for the CaFe2O4 obtained in the air showed the presence of defect levels in the energy band structure. Oxygen pressure reduction during the synthesis results in levels vanishing. Therefore, we suppose the key role of oxygen atoms in the transport properties of the material, which is indirectly confirmed by XPS data. In prospect, CaFe2O4 can be used in promising gas analyzers.

Смотреть статью,
Scopus,
Читать в сети ИФ
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
NRC “Kurchatov Institute”, 123182, Moscow, Russia
Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, 630090, Novosibirsk, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Tarasov, A. S.; Тарасов, Антон Сергеевич; Platunov, M. S.; Платунов, Михаил Сергеевич; Trigub, A. L.; Bayukov, O. A.; Баюков, Олег Артемьевич; Boronin, A. I.; Solovyov, L. A.; Rabchevskii, E. V.; Shishkina, N. N.; Anshits, A. G.
}
Найти похожие

Ferrihydrite nanoparticles produced by Klebsiella oxytoca: Structure and properties dependence on the cultivation time / S. V. Stolyar, O. A. Bayukov, D. A. Balaev [et al.] // Adv. Powder Technol. - 2022. - Vol. 33, Is. 8. - Ст. 103692, DOI 10.1016/j.apt.2022.103692. - Cited References: 59. - This work was supported by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects No. 20-416-242907 . - ISSN 0921-8831
Кл.слова (ненормированные):
Ferrihydrite nanoparticles -- Structure -- Microbial synthesis -- Mössbauer spectroscopy -- Small-angle X-ray scattering
Аннотация: Ferrihydrite nanoparticles were synthesized using Klebsiella oxytoca microorganisms under various cultivation conditions. The cultivation of bacteria was carried out under various lighting conditions, and the duration of cultivation varied from 3 to 56 days. Biogenic ferrihydrite nanoparticles were studied by Mössbauer spectroscopy, magnetometry, and small-angle X-ray scattering. The process of formation of ferrihydrite nanoparticles and the states arising during the cultivation of microorganisms have been investigated. The results of Mössbauer spectroscopy showed that, depending on the time of cultivation, three different states of ferrihydrite can be realized. States differ both in the ratio of defective and non-defective positions, and the size of the particle. Experimental results indicate that ferrihydrite nanoparticles are a system of variable composition and pass through several structural (or morphological) states during the cultivation of microorganisms. A model of the structure of ferrihydrite nanoparticles is proposed, which consists in the presence of an antiferromagnetic dense core with a high Néel temperature and a friable shell with a significantly lower temperature of magnetic ordering.

Смотреть статью,
Scopus
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Joint Institute for Nuclear Research, Dubna, Russian Federation

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Bayukov, O. A.; Баюков, Олег Артемьевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Ladygina, V. P.; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Balasoiu, M.; Kolenchukova, O. A.; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
Найти похожие