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

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (3)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=Iron<.>)

Общее количество найденных документов : 369
Показаны документы с 1 по 20

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulina N. V., Bondarenko G. V., Marachevsky A.V., Chekanova L. A., Prokof'ev D. E., Churilov G. N., Gromyko A. I.
Заглавие : About iron globules formed at cooling of iron-contained plasma
Место публикации : Phys. Metals Metallogr. - New York: MAIK Nauka/Interperiodica/Springer, 2006. - Vol. 102. - С. S94-S95. - ISSN 0031-918X, DOI 10.1134/S0031918X06140249
Примечания : Cited Reference Count: 4
Аннотация: This paper is devoted to the investigation of iron globules that are formed during cooling of the iron-carbon-helium plasma and as a result of destruction of a natural ball lightning. Scanning electron microscopy, X-ray fluorescence, X-ray diffraction, and ferromagnetic resonance investigations were carried out. The magnetization values of the samplers were determined.
WOS,
eLibrary,
Scopus,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bataleva Y. V., Palyanov Y. N., Borzdov Y. M., Novoselov I. D., Bayukov O. A.
Заглавие : An effect of reduced S-rich fluids on diamond formation under mantle-slab interaction
Место публикации : Lithos. - 2019. - Vol. 336-337. - P.27-39. - ISSN 00244937 (ISSN), DOI 10.1016/j.lithos.2019.03.027
Примечания : Cited References: 73. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054 and a state assignment of IGM SB RAS. The authors thank S. Ovchinnikov for his assistance in implementation of the Mossbauer spectroscopy measurements.
Аннотация: Experimental study, dedicated to understanding the effect of S-rich reduced fluids on the diamond-forming processes under subduction settings, was performed using a multi-anvil high-pressure split-sphere apparatus in Fe3C-(Mg,Ca)CO3-S and Fe0-(Mg,Ca)CO3-S systems at the pressure of 6.3 GPa, temperatures in the range of 900–1600 °C and run time of 18–60 h. At the temperatures of 900 and 1000 °C in the carbide-carbonate-sulfur system, extraction of carbon from cohenite through the interaction with S-rich reduced fluid, as well as C0-producing redox reactions of carbonate with carbide were realized. As a result, graphite formation in assemblage with magnesiowüstite, cohenite and pyrrhotite (±aragonite) was established. At higher temperatures (≥1100 °C) formation of assemblage of Fe3+-magnesiowüstite and graphite was accompanied by generation of fO2-contrasting melts - metal-sulfide with dissolved carbon (Fe-S-C) and sulfide-oxide (Fe-S-O). In the temperature range of 1400–1600 °C spontaneous diamond nucleation was found to occur via redox interactions of carbide or iron with carbonate. It was established, that interactions of Fe-S-C and Fe-S-O melts as well as of Fe-S-C melt and magnesiowüstite, were С0-forming processes, accompanied by disproportionation of Fe. These resulted in the crystallization of Fe3+-magnesiowüstite+graphite assemblage and growth of diamond. We show that a participation of sulfur in subduction-related elemental carbon-forming processes results in sharp decrease of partial melting temperatures (~300 °C), reducting the reactivity of the Fe-S-C melt relatively to FeC melt with respect to graphite and diamond crystallization and decrease of diamond growth rate.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Bayukov O. A., Chekanova L. A., Gerasimova Y. V., Sokolov A. Е., Iskhakov R. S., Yaroslavtsev R. N., Volochaev M. N., Artemyeva A. S., Cheremiskina E. V., Knyazev Yu. V.
Заглавие : Anisometric iron oxide-based nanoparticles and sols based on them: Preparation and properties
Место публикации : J. Supercond. Novel Magn. - 2019. - Vol. 32, Is. 4. - P.971–975. - ISSN 15571939 (ISSN) , DOI 10.1007/s10948-018-4784-7
Примечания : Cited References: 18. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Projects No. 18-43-243003, No. 17-42-240080 and No. 17-43-240527. The work is supported by the Special Program of the Ministry of Education and Science of the Russian Federation for the Siberian Federal University.
Ключевые слова (''Своб.индексиров.''): nanoparticles and nanorods--chemical preparation--superparamagnetism
Аннотация: We have synthesized magnetic powders of the magnetite-maghemite series by the chemical reaction of the FeSO4 iron salt and the natural arabinogalactan polysaccharide. These particles with a high magnetization value (∼ 300 Gs) represent a mixture of spherical particles and nanorods. Particles of a spherical shape (diameter of ∼ 5–6 nm) show a superparamagnetic behavior at room temperature, while rods with a diameter of ∼ 5 nm and a length of 30 nm are magnetic. We have prepared sol samples based on the nanoparticle aqueous solution of arabinogalactan. Our results on the magnetism of the circular dichroism (MCD) on sol are consistent with the of Mössbauer spectroscopy data.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Zelenov F. V., Semenov S. V., Bayukov O. A.
Заглавие : Anomalies in the magnetic properties of bismuth-substituted diluted yttrium iron garnet
Колич.характеристики :9 с
Место публикации : J. Magn. Magn. Mater. - 2023. - Vol. 582. - Ст.171030. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2023.171030. - ISSN 18734766 (eISSN)
Примечания : Cited References: 61. - The authors are grateful to T. N. Tarasenko for providing samples for magnetic measurements
Аннотация: The magnetic properties and Mossbauer spectra of the Y1.8Bi1.2Fe3.5Ga1.5O12 compound were investigated. A linear temperature dependence of the saturation magnetization, hysteresis, and stability of the coercive field in the magnetically ordered state were found. Using the Mossbauer measurements, the distribution of iron ions over octahedral and tetrahedral sites and the concentration of paramagnetic iron ions were determined. Two critical temperatures – the sublattice magnetization compensation temperature and the ferrimagnet–paramagnet transition temperature – were established. The disappear of the phonon mode in the vicinity of the magnetic transition was observed. The experimental data have been interpreted in terms of the spin–lattice interaction model.
Смотреть статью,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Petrakovskii G. A., Bezmaternykh L. N., Temerov V. L.
Заглавие : Antiferromagnetic resonance and magnetic anisotropy in single crystals of the YFe3(BO3)(4)-GdFe3(BO3)(4) system
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 1. - P79-83. - ISSN 1063-7834, DOI 10.1134/S1063783408010150
Примечания : Cited References: 16
Предметные рубрики: IRON BORATE GDFE3(BO3)(4)
ND3+
Аннотация: The antiferromagnetic resonance in single crystals of the YFe3(BO3)(4)-GdFe3(BO3)(4) system is studied in the frequency range 25-140 GHz and the temperature range 4.2-50.0 K. It is established that the YFe3(BO3)(4) crystal containing only the magnetic subsystem of Fe3+ ions is an antiferromagnet with an easy anisotropy plane. The temperature dependences of the gaps in the antiferromagnetic resonance spectra of GdFe3(BO3)(4) and YxGd1-xFe3(BO3)(4) are used to calculate the contributions of the Fe3+ and Gd3+ subsystems to the magnetic anisotropy of these crystals. The contributions are found to be close in magnitude and have opposite signs. This leads to a relatively weak uniaxial anisotropy field in the crystals under investigation. Since the exchange interaction between the Gd3+ and Fe3+ ions magnetizes the magnetic subsystem of gadolinium, both subsystems start to contribute simultaneously at the Neel temperature of the iron subsystem.
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Grishina, Svetlana, Kodera, Peter, Goryainov, Sergey, Oreshonkov A. S., Seryotkin, Yurii, Simko, Frantisek, Polozov, Alexander G.
Заглавие : Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00682]; European Regional Development FundEuropean Union (EU) [ITMS 26240220086]; Vedecka Grantova Agentura MSVVaS SR a SAV [1/0313/20]
Место публикации : J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P.2505-2516. - ISSN 0377-0486, DOI 10.1002/jrs.6005. - ISSN 1097-4555(eISSN)
Примечания : Cited References: 55. - Russian Foundation for Basic Research, Grant/Award Numbers: 18-05-00682, 18-05-00682; European Regional Development Fund, Grant/Award Number: ITMS 26240220086; Vedecka Grantova Agentura MSVVaS SR a SAV, Grant/Award Number: 1/0313/20
Предметные рубрики: SALT MELT
IRON
DEPOSIT
FLUIDS
TRANSFORMATIONS
FERRIHYDRITE
Аннотация: Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral‐forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high‐resolution X‐ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman‐active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tarasov A. S., Lukyanenko A. V., Tarasov I. A., Bondarev I. A., Smolyarova T. E., Kosyrev N. N., Komarov V. A., Yakovlev I. A., Volochaev M. N., Solovyov L. A., Shemukhin A. A., Varnakov S. N., Ovchinnikov S. G., Patrin G. S., Volkov N. V.
Заглавие : Approach to form planar structures based on epitaxial Fe1 − xSix films grown on Si(111)
Место публикации : Thin Solid Films: Elsevier, 2017. - Vol. 642. - P.20-24. - ISSN 00406090 (ISSN), DOI 10.1016/j.tsf.2017.09.025
Примечания : Cited References: 29. - We thank V.S. Zhigalov for assistance with the electron microscopy studies. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects Nos. 16-42-243046, 16-42-242036 and 16-42-243060. The work was also supported by the Program of the President of the Russian Federation for the support of leading scientific schools (Scientific School 7559.2016.2).
Ключевые слова (''Своб.индексиров.''): iron silicides--wet etching--planar structures--moke microscopy
Аннотация: An approach to form planar structures based on ferromagnetic Fe1 − xSix films is presented. Epitaxial Fe1 − xSix iron‑silicon alloy films with different silicon content (x = 0–0.4) were grown on Si(111) substrates. Structural in situ and ex situ characterization of the films obtained was made by X-ray diffraction, reflective high-energy electron diffraction, Rutherford backscattering spectrometry and transmission electron microscopy, which confirmed single crystallinity and interface abruptness for all films. Etching rates in the wet etchant (HF: HNO3: H2O = 1: 2: 400) for the films with various chemical composition were obtained. A nonmonotonic dependence of the etching rate on silicon content with a maximum for the composition Fe0.92Si0.08 was discovered. Moreover, the etching process is vertical and selective in the etching solution, i.e., the etching process takes place only in silicide film and does not affect substrate. As an example, a four-terminal planar structure was made of Fe0.75Si0.25/Si(111) structure using the etching rate obtained for this silicon content. Magneto-optical Kerr effect (MOKE) microscopy and transport properties characterization indicated successful etching process.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tarasov A. S., Tarasov I. A., Yakovlev I. A., Rautskii M. V., Bondarev I. A., Lukyanenko A. V., Platunov M. S., Volochaev M. N., Efimov, Dmitriy D., Goikhman, Aleksandr Yu., Belyaev B. A., Baron F. A., Shanidze, Lev V., Farle M., Varnakov S. N., Ovchinnikov S. G., Volkov N. V.
Заглавие : Asymmetric interfaces in epitaxial off-stoichiometric Fe3+xSi1-x/Ge/Fe3+xSi1-x hybrid structures: Effect on magnetic and electric transport properties
Коллективы : RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Regional Fund of Science [20-42-243007, 20-42-240012]; Government of the Russian Federation [075-15-2019-1886]; Ministry of Science and Higher Education of the Russian Federation [FZWN-2020-0008]
Место публикации : Nanomaterials. - 2022. - Vol. 12, Is. 1. - Ст.131. - ISSN 2079-4991(eISSN), DOI 10.3390/nano12010131
Примечания : Cited References: 61. - The research was funded by RFBR, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-42-243007, and by the Government of the Russian Federation, Mega Grant for the Creation of Competitive World-Class Laboratories (Agreement no. 075-15-2019-1886). I.A.T. and S.N.V. thank RFBR, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-42-240012, for partial work related to the development of the simulation model of the pore autocorrelated radial distribution function coupled with the near coincidence site model, the Fe3+xSi1-x lattice distortion analysis, and processing Rutherford backscattering spectroscopy data. The Rutherford backscattering spectroscopy measurements were supported by the Ministry of Science and Higher Education of the Russian Federation (project FZWN-2020-0008)
Предметные рубрики: FILMS
ANISOTROPY
SI(001)
DEVICES
SURFACE
GROWTH
Аннотация: Three-layer iron-rich Fe3+xSi1-x/Ge/Fe3+xSi1-x (0.2 x 0.64) heterostructures on a Si(111) surface with Ge thicknesses of 4 nm and 7 nm were grown by molecular beam epitaxy. Systematic studies of the structural and morphological properties of the synthesized samples have shown that an increase in the Ge thickness causes a prolonged atomic diffusion through the interfaces, which significantly increases the lattice misfits in the Ge/Fe3+xSi1-x heterosystem due to the incorporation of Ge atoms into the Fe3+xSi1-x bottom layer. The resultant lowering of the total free energy caused by the development of the surface roughness results in a transition from an epitaxial to a polycrystalline growth of the upper Fe3+xSi1-x. The average lattice distortion and residual stress of the upper Fe3+xSi1-x were determined by electron diffraction and theoretical calculations to be equivalent to 0.2 GPa for the upper epitaxial layer with a volume misfit of -0.63% compared with a undistorted counterpart. The volume misfit follows the resultant interatomic misfit of |0.42|% with the bottom Ge layer, independently determined by atomic force microscopy. The variation in structural order and morphology significantly changes the magnetic properties of the upper Fe3+xSi1-x layer and leads to a subtle effect on the transport properties of the Ge layer. Both hysteresis loops and FMR spectra differ for the structures with 4 nm and 7 nm Ge layers. The FMR spectra exhibit two distinct absorption lines corresponding to two layers of ferromagnetic Fe3+xSi1-x films. At the same time, a third FMR line appears in the sample with the thicker Ge. The angular dependences of the resonance field of the FMR spectra measured in the plane of the film have a pronounced easy-axis type anisotropy, as well as an anisotropy corresponding to the cubic crystal symmetry of Fe3+xSi1-x, which implies the epitaxial orientation relationship of Fe3+xSi1-x (111)[0-11] || Ge(111)[1-10] || Fe3+xSi1-x (111)[0-11] || Si(111)[1-10]. Calculated from ferromagnetic resonance (FMR) data saturation magnetization exceeds 1000 kA/m. The temperature dependence of the electrical resistivity of a Ge layer with thicknesses of 4 nm and 7 nm is of semiconducting type, which is, however, determined by different transport mechanisms.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Babkin E. V., Koval K. P., Pynko V. G.
Заглавие : Magnetic-properties of ferrimagnetic iron-oxide gamma-Fe2O3
Место публикации : Zhurnal Eksperimentalnoi Teor. Fiz. - 1991. - Vol. 100, Is. 2. - P.582-589. - ISSN 0044-4510
Примечания : Cited References: 10
Аннотация: The results of an investigation of the magnetic properties of iron oxide gamma-Fe2O3 are presented. Epitaxial crystallization on a magnesium oxide backing ensured the stability of the compound in a broad temperature range. The temperature dependences of the magnetization and magnetic anisotropy constants are measured. The magnetization of the sublattices and the single-ion anisotropy constants foh the Fe3+ ion are determined. A magnetic anisotropy induced by the growth of the film is observed, its nature being dependent on the crystallographic orientation of the backing. It is shown that the cause of the appearance of the anisotropy is the ordering of the cation vacancies during the growth of the film.
WOS
Найти похожие

10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Baksheev N. V., Mushailov E. S.
Заглавие : Spin reorientation effect of conductive electrons in iron matrix doped with cobalt
Место публикации : Fiz. Tverd. Tela. - 1981. - Vol. 23, Is. 2. - P.631-633. - ISSN 0367-3294
Примечания : Cited References: 9
WOS
Найти похожие

11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunovich L. V., Korshunov M. M.
Заглавие : Band structure of organic-ion-intercalated (EMIM)xFeSe superconductor
Место публикации : Materials. - 2022. - Vol. 15, Is. 5. - Ст.1856. - ISSN 19961944 (ISSN), DOI 10.3390/ma15051856
Примечания : Cited References: 62. - This work was supported in part by Russian Science Foundation (Project 19-73-10015)
Аннотация: The band structure and the Fermi surface of the recently discovered superconductor (EMIM)xFeSe are studied within the density functional theory in the generalized gradient approximation. We show that the bands near the Fermi level are formed primarily by Fe-d orbitals. Although there is no direct contribution of EMIM orbitals to the near-Fermi level states, the presence of organic cations leads to a shift of the chemical potential. It results in the appearance of small electron pockets in the quasi-two-dimensional Fermi surface of (EMIM)xFeSe.
Смотреть статью,
Scopus,
Читать в сети ИФ
Найти похожие

12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunovich L. V., Korshunov M. M., Ovchinnikov S. G.
Заглавие : Magnetic collapse in Fe3Se4 under high pressure
Место публикации : Materials. - 2022. - Vol. 15, Is. 13. - Ст.4583. - ISSN 19961944 (ISSN), DOI 10.3390/ma15134583
Примечания : Cited References: 27. - L.V.B. and S.G.O. acknowledge the support of the Russian Science Foundation (Project 18-12-00022Π). We acknowledge the useful discussions with M.A. Vysotin. L.V.B. would like to thank the Information Technology Center, Novosibirsk State University, for providing access to their supercomputer facilities
Аннотация: Electronic structure and magnetic properties of Fe3Se4 are calculated using the density functional approach. Due to the metallic properties, magnetic moments of the iron atoms in two nonequivalent positions in the unit cell are different from ionic values for Fe3+ and Fe2+ and are equal to M1=2.071μB and M2=−2.042μB, making the system ferrimagnetic. The total magnetic moment for the unit cell is 2.135μB. Under isotropic compression, the total magnetic moment decreases non-monotonically and correlates with the non-monotonic dependence of the density of states at the Fermi level N(EF). For 7% compression, the magnetic order changes from the ferrimagnetic to the ferromagnetic. At 14% compression, the magnetic order disappears and the total magnetic moment becomes zero, leaving the system in a paramagnetic state. This compression corresponds to the pressure of 114 GPa. The magnetic ordering changes faster upon application of an isotropic external pressure due to the sizeable anisotropy of the chemical bondings in Fe3Se4. The ferrimagnetic and paramagnetic states occur under pressures of 5.0 and 8.0 GPa, respectively. The system remains in the metallic state for all values of compression.
Смотреть статью,
Scopus,
Читать в сети ИФ
Найти похожие

13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Izotov A. V.
Заглавие : Micromagnetic calculation of magnetostatic oscillation modes of an orthogonally magnetized disk of yttrium iron garnet
Место публикации : Phys. Solid State. - 2013. - Vol. 55, Is. 12. - P.2491-2500. - ISSN 1063-7834, DOI 10.1134/S1063783413120068
Аннотация: The absorption spectrum of a normally magnetized disk of yttrium iron garnet, which is associated with resonances of magnetostatic oscillation modes excited by a homogeneous high-frequency magnetic field, has been investigated using a numerical analysis of the micromagnetic model developed for ferromagnetic objects. The distribution of magnetization oscillation amplitudes over the disk surface area has been obtained for the first four modes. A good agreement between the results of the micromagnetic simulation and the data of analytical calculations for special cases has proved the reliability and efficiency of the proposed approach in numerical experiments on the study of the magnetization dynamics in objects with different geometries and shapes, including multilayer magnetic film structures.
Scopus,
Смотреть статью,
WOS,
Читать в сети ИФ
Найти похожие

14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova M. N., Stanislavchuk T. N., Malkin B. Z., Bezmaternykh L. N.
Заглавие : Breaking of the Selection Rules for Optical Transitions in the Dielectric PrFe3(BO3)(4) Crystal by a Praseodymium-Iron Exchange Interaction
Коллективы : RFBR [07-02-01185, 07-02-00704]; Russian Academy of Sciences
Разночтения заглавия :авие SCOPUS: Breaking of the selection rules for optical transitions in the dielectric PrFe3(BO3)4 crystal by a praseodymium-iron exchange interaction
Место публикации : Phys. Rev. Lett.: AMER PHYSICAL SOC, 2009. - Vol. 102, Is. 18. - Ст.187403. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.102.187403
Примечания : Cited References: 26. - This work was supported in part by the RFBR under Grants No. 07-02-01185 and No. 07-02-00704 and by the Russian Academy of Sciences under the Programs for Basic Research.
Предметные рубрики: SINGLE-CRYSTAL
GDFE3(BO3)(4)
PHASE
DYFE3(BO3)(4)
SPECTRUM
LINES
Ключевые слова (''Своб.индексиров.''): magnetic ordering temperatures--optical spectrum--order parameters--point symmetries--selection rules--exchange interactions--neon--praseodymium--single crystals--crystal symmetry
Аннотация: We report on the emergence of new lines in the optical spectrum of the PrFe3(BO3)(4) single crystal at the magnetic ordering temperature. The transitions between singlet crystal-field sublevels of Pr3+ ion with the same transformational properties, strictly forbidden for the trigonal D-3 point symmetry of this ion in PrFe3(BO3)(4), appear below the Neel temperature and grow in intensity as a square of the order parameter. We show that the phenomenon originates from the mixing of wave functions of different Pr3+ sublevels by the Pr-Fe exchange interaction.
WOS,
Scopus,
Читать в сети ИФ
Найти похожие

15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Andryushin N. D., Zinenko V. I., Pavlovskii M. S., Shinkorenko A. S.
Заглавие : Calculation and Comparison of Electronic, Vibrational, Polarization, and Magnetic Properties of Double Perovskites CaMnTi2O6 and CaFeTi2O6
Место публикации : J. Exp. Theor. Phys. - 2019. - Vol. 129, Is. 6. - P.1036-1044. - ISSN 10637761 (ISSN), DOI 10.1134/S1063776119110013
Примечания : Cited References: 18. - This work was supported by the Russian Foundation for Basic Research (project no. 18-02-00130-a)
Аннотация: Vibrational, polarization, magnetic, and electronic properties of double perovskites CaMnTi2O6 and CaFeTi2O6 with a rare type of “column” ordering of divalent metal cations have been calculated based on the density functional theory. Analysis of the crystal lattice dynamics for paraelectric phase P42/nmc of both compounds has revealed that ferroelectric instability exists only in CaMnTi2O6. It is found that the structure distortion of the paraphrase of CaMnTi2O6 in the eigenvector of the unstable polar mode leads to a structure with the P42/nmc space group. The calculated spontaneous polarization for the ferroelectric phase of CaMnTi2O6 is Ps = 25 μC/cm2. The spin-polarization calculations have shown that the ground state is ferromagnetic in the CaFeTi2O6 crystal and antiferromagnetic in the CaMnTi2O6 crystal. The exchange interaction constants have been calculated using the Heisenberg model and the mean field approximation; the phase transition temperature for each compound has been estimated.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие

16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rabchevskii E. V., Pletnev O. N., Anshits O. V., Bayukov O. A., Anshits A. G.
Заглавие : Change of iron state in ferrospheres under the influence of the reaction mixture in the process of oxidative coupling of methane
Коллективы : Российская академия наук, Совет РАН "Общая химия и наука о материалах" РАН, Институт металлургии и материаловедения им. А. А. Байкова РАН, Московский государственный технический университет радиотехники, электроники и автоматики, "Мёссбауэровская спектроскопия и её применения", Международная конференция
Место публикации : XIII Международная конференция "Мёссбауэровская спектроскопия и её применения" (ICMSA-2014). - Суздаль: ИМЕТ РАН, 2014. - С. 103. - ISBN 978-5-4253-0757-6
Материалы конференции
Найти похожие

17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shapovalov V. V., Shapovalov V. A., Sluzhbin Yu. A., Drokina T. V., Vorotynov A. M., Valkov V. I.
Заглавие : Characteristics of nanocomplexes with iron Fe3+ in Glass Ionomer Cement powder by ESR method
Место публикации : Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P.296-298. - ISSN 10637834 (ISSN), DOI 10.21883/PSS.2023.02.55415.489. - ISSN 10906460 (eISSN)
Примечания : Cited References: 13
Аннотация: The study is part of nanomedical biotechnology and is carried out by probing these systems using the Electronic Spin Resonance (ESR) method. The paper investigates Glass Ionomer Cement powder widely used in dental practice Glass Ionomer Cement C-Plus Triplekit-TM. To assess the quality of Glass Ionomer Cement and use ESR radiospectroscopy in the range from low (T=4.2 K) to room (T=300 K) temperatures. A new characteristic of compounds with nanocomplexes of magnetic iron ions Fe3+ is applied.
Смотреть статью,
Читать в сети ИФ
Найти похожие

18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ovchinnikov S.G., Varnakov S.N., Fedorov A.S., Lyaschenko S.A., Yakovlev I.A.
Заглавие : Characterization and magnetic properties of the iron silicides
Коллективы : Asian School-Conference on Physics and Technology of Nanostructured Materials, Азиатская школа-конференция по физике и технологии наноструктурированных материалов
Место публикации : Proceedings Asian School-Conference on Physics and Technology of Nanostructured Materials (ASCO-NANOMAT 2011)/ Asian School-Conference on Physics and Technology of Nanostructured Materials (2011 ; Aug. ; 22-29 ; Vladivostok, Russia), Азиатская школа-конференция по физике и технологии наноструктурированных материалов (1 ; 2011 ; авг. ; 21-28 ; Владивосток). - 2011
Найти похожие

19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kosyrev N. N., Varnakov S. N., Tarasov I. A., Lyashenko S. A., Ovchinnikov S. G.
Заглавие : Characterization of manganese and iron silicides by in situ spectral generalized magneto-optical ellipsometry
Коллективы : Workshop Ellipsometry (7; 2012 ; март ; 5-7; Leipzig, Germany)
Место публикации : 7th Workshop on Ellipsometry: abstract book. - 2012. - P. - 82
Аннотация: Dilute magnetic semiconductors (DMS) combine the electronic transport properties of semiconductors and memory characteristics of magnetic materials. The complementary properties of semiconductor and ferromagnetic material can manipulate both degrees of freedoms of electrons0 spins and charges for spintronic devices. In recent years, group IV(Ge,Si)-based DMSs attract considerable experimental effort due to the compatibility with mainstream silicon technology. In ourworkwe present the investigation of structural,magnetic and optical properties ofmanganese and iron silicides thin films on Si (100) substrate by in situ spectral generalizedmagneto-optical ellipsometry. Themeasurementswere performed by spectral and laser ellipsometers (“Spectroscan“ and “LEF-71“ respectively by Institute Semiconductors Physics SB RAS), optimized tomeasure not only traditional ellipsometric parameters, but also magneto-optical response of the sample. The magnetoellipsometers were integrated into the ultrahigh vacuum chambers of molecular beam epitaxy setup, which allowed to control the optical and magnetic properties of thin films directly in the growth process. As a result of the magneto-optical response analysis, it was found that iron and manganese silicides in magnetic phase were formed on the Si surface and by analysis of the ellipsometric parameters dependence on evaporation time the silicide nanoclusters were identified and their structural properties were found. The work was supported by project 4.1 of the OFN RAS, project 27.10 of the Presidium RAS, integration project22 of SB RAS and FEB RAS, and also the FCP NK-744P/6 .
Материалы конференции
Найти похожие

20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov D. A., Lin C. R., Ivantsov R. D., Ovchinnikov S. G., Zharkov S. M., Yurkin G. Yu., Velikanov D. A., Knyazev Yu. V., Molokeev M. S., Tseng Y. T., Lin E. S., Edelman I. S., Baskakov A. O., Starchikov S. S., Lyubutin I. S.
Заглавие : Characterization of the iron oxide phases formed during the synthesis of core-shell FexOy@C nanoparticles modified with Ag
Место публикации : Nanotechnology. - 2020. - Vol. 31, Is. 39. - Ст.395703. - ISSN 13616528 (ISSN), DOI 10.1088/1361-6528/ab9af2
Примечания : 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
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.
Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Найти похожие