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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ruseikina A. V., Grigoriev M. V., Solovyov L. A., Chernyshev V. A., Aleksandrovsky A. S., Krylov A. S., Krylova S. N., Shestakov N. P., Velikanov D. A., Garmonov A. A., Matigorov A. V., Eberle M. A., Schleid T., Safin D. A.
Заглавие : A Challenge toward novel quaternary sulfides SrLnCuS3 (Ln = La, Nd, Tm): Unraveling synthetic pathways, structures and properties
Место публикации : Int. J. Mol. Sci. - 2022. - Vol. 23, Is. 20. - Ст.12438. - ISSN 14220067 (ISSN), DOI 10.3390/ijms232012438
Примечания : Cited References: 62. - The research was funded by the Tyumen Oblast Government, as part of the West-Siberian Interregional Science and Education Center’s project No. 89-DON (3). This work was supported by state assignment of the Ministry of Science and Higher Education of the Russian Federation (Project Reg. No. 720000Φ.99.1.Б385AA13000)
Аннотация: We report on the novel heterometallic quaternary sulfides SrLnCuS3 (Ln = La, Nd, Tm), obtained as both single crystals and powdered samples. The structures of both the single crystal and powdered samples of SrLaCuS3 and SrNdCuS3 belong to the orthorhombic space group Pnma but are of different structural types, while both samples of SrTmCuS3 crystallize in the orthorhombic space group Cmcm with the structural type KZrCuS3. Three-dimensional crystal structures of SrLaCuS3 and SrNdCuS3 are formed from the (Sr/Ln)S7 capped trigonal prisms and CuS4 tetrahedra. In SrLaCuS3, alternating 2D layers are stacked, while the main backbone of the structure of SrNdCuS3 is a polymeric 3D framework [(Sr/Ln)S7]n, strengthened by 1D polymeric chains (CuS4)n with 1D channels, filled by the other Sr2+/Ln3+ cations, which, in turn, form 1D dimeric ribbons. A 3D crystal structure of SrTmCuS3 is constructed from the SrS6 trigonal prisms, TmS6 octahedra and CuS4 tetrahedra. The latter two polyhedra are packed together into 2D layers, which are separated by 1D chains (SrS6)n and 1D free channels. In both crystal structures of SrLaCuS3 obtained in this work, the crystallographic positions of strontium and lanthanum were partially mixed, while only in the structure of SrNdCuS3, solved from the powder X-ray diffraction data, were the crystallographic positions of strontium and neodymium partially mixed. Band gaps of SrLnCuS3 (Ln = La, Nd, Tm) were found to be 1.86, 1.94 and 2.57 eV, respectively. Both SrNdCuS3 and SrTmCuS3 were found to be paramagnetic at 20-300 K, with the experimental magnetic characteristics being in good agreement with the corresponding calculated parameters.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tyumentseva A. V., Tyutrina E. S., Stolyar S. V., Yaroslavtsev R. N., Velikanov D. A.
Заглавие : Aminated magnetic nanoparticles for epithelial cell separation
Коллективы : International Baltic Conference on Magnetism: focus on nanobiomedicine and smart materials, Балтийский федеральный университет им. И. Канта
Место публикации : 4th International Baltic Conference on Magnetism (IBCM 2021): Book of abstracts. - 2021. - P.208
Примечания : 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. 20-42-242902 and by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3). We are grateful to the Center of collective use of FRC KSC SB RAS for the provided equipment.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tyumentseva A. V., Yaroslavtsev R. N., Stolyar S. V., Komogortsev S. V., Velikanov D. A., Gerasimova Yu. V., Knyazev Yu. V.
Заглавие : Aminated magnetic nanoparticles functionalized with antibodies for cell separation
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. M: Magnetism in biology and medicine. - Ст.M.P10. - P.442-443. - ISBN 978-5-94469-051-7
Примечания : Cited References: 2. - The study was supported by the Russian Science Foundation and the Krasnoyarsk Region Science and Technology Support Fund, grant No. 22-14-20020
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Li O. A., Nikolaeva E. D., Vorotynov A. M., Velikanov D. A., Knyazev Yu. V., Bayukov O. A., Iskhakov R. S., P’yankov V. F., Volochaev M. N.
Заглавие : An effective method of magnetic hyperthermia based on the ferromagnetic resonance phenomenon
Место публикации : Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 2. - P.174-180. - ISSN 0031918X (ISSN), DOI 10.1134/S0031918X22601834. - ISSN 15556190 (eISSN)
Примечания : Cited References: 15. - This study was supported by grant no. 22-14-20020 from the Russian Science Foundation and the Krasnoyarsk Regional Fund for Support of Scientific and Technological Activities. The authors are grateful to the Krasnoyarsk Regional Center for Collective Use at Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, for providing their research facilities
Аннотация: Nickel and cobalt ferrite nanoparticles have been synthesized using the chemical precipitation method; the nanoparticle sizes were found to be 63 ± 22 and 26 ± 4 nm, respectively. The static hysteresis loops and Mossbauer spectra have been measured. It is shown that cobalt ferrite powders are magnetically harder than nickel ferrite powders. Ferromagnetic resonance (FMR) curves have been studied. It is found that the FMR absorption for cobalt ferrite is observed at room temperature and above. The time dependences of the nanoparticle warm-up under FMR conditions have been measured. The maximum temperature changes for nickel ferrite and cobalt ferrite particles are 8 and 11 K, respectively. Using the example of cobalt ferrite powder, the possibility of effectively heating of particles in the FMR mode in their own field without using a DC magnetic field source is shown. The observed effect can be used in magnetic hyperthermia.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Semenov S. V., Balaev D. A., Pochekutov M. A., Velikanov D. A.
Заглавие : Anisotropy of the magnetoresistive properties of granular high-temperature superconductors resulting from magnetic flux compression in the intergrain medium
Место публикации : Phys. Solid State: Maik Nauka-Interperiodica Publishing, 2017. - Vol. 59, Is. 7. - P.1291-1297. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783417070241
Примечания : Cited References: 26
Аннотация: To elucidate the origin of the well-known anisotropy of the magnetoresistive properties of granular high-temperature superconductors (HTSs), which is related to the mutual orientation of magnetic field H and transport current j, we investigate the hysteretic dependences of magnetoresistance R(H) of the yttrium HTS sample at the perpendicular (H ⊥ j) and parallel (H || j) configurations. The hysteretic R(H) dependences are analyzed using the concept of the effective field in the intergrain boundaries through which superconducting current carriers tunnel. The effective degree of magnetic flux compression in the intergrain medium at the perpendicular configuration was found to be twice as much as at the parallel one. This approach explains well the anisotropy of the magnetoresistive properties of granular HTSs, which was previously reported by many authors, and the temperature dependences of the resistance in the resistive transition region.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Petrakovskii G. A., Vtyurin A. N., Rasch J., Krylov A. S., Gerasimova Yu. V., Velikanov D. A., Boehm M., Sokolov V.
Заглавие : Anomalous Raman phenomenon of CuCrS2
Место публикации : J. of Ra man Spectroscopy. - 2010. - Vol. 41, Is. 12. - С. 1485-1488
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrakovskii G. A., Ryabinkina L. I., Abramova G. M., Velikanov D. A., Bovina A. F.
Заглавие : Antiferromagnet-ferromagnet transition in alpha-MnxS manganese sulfides
Разночтения заглавия :авие SCOPUS: Antiferromagnet-ferromagnet transition in α-MnxS manganese sulfides; авие SCOPUS: Antiferromagnet-ferromagnet transition in ?-MnxS manganese sulfides
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2001. - Vol. 43, Is. 3. - P493-495. - ISSN 1063-7834, DOI 10.1134/1.1356126; Phys. Solid State. - 2001. - Vol. 43, Is. 3. - P493-495. - Вариант Sopus
Примечания : Cited References: 7
Аннотация: Off-stoichiometric manganese monosulfides alpha -MnxS (1 less than or equal to x less than or equal to 1.25) are synthesized, and their crystal structure and magnetic properties are studied in the 4.2- to 300-K range. The compounds have a NaCl fcc lattice. Increasing the manganese ion concentration x in the antiferromagnetic semiconductors alpha -MnxS is found to result in concentration- (x(c) similar to 1.05) and temperature-driven (T-c similar to 50 K) magnetic transitions from the antiferromagnetic to ferromagnetic state, with the cubic structure remaining unchanged. (C) 2001 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dudnikov V. A., Velikanov D. A., Kazak N. V., Michel C. R., Bartolome J., Arauzo A., Ovchinnikov S. G., Patrin G. S.
Заглавие : Antiferromagnetic ordering in REM cobaltite GdCoO3
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 1. - P.79-83. - ISSN 1063-7834, DOI 10.1134/S106378341201009X
Примечания : Cited References: 16. - This study was supported by the program of the Branch of Physical Sciences of the Russian Academy of Sciences "Strong Electron Correlations," the Russian Foundation for Basic Research (project no. 09-02-00171-a), and Federal Agency for Science and Innovations (grant no. MK-5632.2010.2).
Предметные рубрики: SPIN-STATE
RCo3O3 R
Sm
Eu
Nd
Аннотация: Temperature and magnetic-field dependences of the static magnetization of polycrystalline cobaltite GdCoO3 have been measured. The magnetic properties of the GdCoO3 sample have been studied in the paramagnetic and antiferromagnetic states. The magnetic phase diagram has been constructed. The exchange field between the Gd-Gd sublattices and the anisotropy field have been estimated.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tugarinov V. I., Pankrats A. I., Kondyan S., Velikanov D. A., Temerov V. L.
Заглавие : Antiferromagnetic resonance and magnetic investigations of rare-earth ferroborates
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2011): Book of abstracts. - 2011. - Ст.24OR-O-10. - P.623
Примечания : Библиогр.: 3. - Work is supported by RFBR grant 10-02-00765
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vnukova N. G., Dudnik A. I., Komogortsev S. V., Velikanov D. A., Nemtsev I. V., Volochaev M., Osipova I. V., Churilov G. N.
Заглавие : Carbon coated nickel nanoparticles produced in high-frequency arc plasma at ambient pressure
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P.164-166. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.142. - ISSN 1873-4766(eISSN)
Примечания : Cited References:10. - The work was supported by Ministry of Education and Science of Russia (Russian-Japanese joined project, Agreement No 14.613.21.0010, ID RFMEFI61314X0010).
Предметные рубрики: FULLERENES
NI3C
Ключевые слова (''Своб.индексиров.''): nanoparticles--carbon--nickel
Аннотация: The nickel particles with the mean size about 10-20 nm coated with carbon were extracted by the treatment of the carbon condensate with nitric and hydrochloric acids. The initial carbon condensate containing nickel nanoparticles with a graphite conversion was synthesized in the high-frequency carbon-helium arc plasma at ambient pressure with the nickel nanoparticles as a catalyst. The nickel content in the nanoparticles was 84.6 wt %. Magnetic properties of the nanoparticles are characterized by the high hysteresis and thermal stability. The sample of compacted nanoparticles is characterized by electrical resistance much higher than it in of compacted initial condensate.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lin, Chun-Rong, Ivanova O. S., Edelman I. S., Knyazev Yu. V., Zharkov S. M., Petrov D. A., Sokolov A. Е., Svetlitsky E. S., Velikanov D. A., Solovyov, Leonid A., Chen, Ying-Zhen, Tseng, Yaw-Teng
Заглавие : Carbon double coated Fe3O4@C@C nanoparticles: Morphology features, magnetic properties, dye adsorption
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52002]; Ministry of Science and Technology of TaiwanMinistry of Science and Technology, Taiwan [108-2923-M-153-001-MY3, 109-2112-M-153-003]; Joint Scientific Center of the Siberian Federal University [FSRZ-2020-0011]; Ministry of Science and Higher Education of the Russian Federation
Место публикации : Nanomaterials. - 2022. - Vol. 12, Is. 3. - Ст.376. - ISSN 2079-4991(eISSN), DOI 10.3390/nano12030376
Примечания : Cited References: 44. - The work was supported financially by the Russian Foundation for Basic Research, Grant No. 19-52-52002 and Ministry of Science and Technology of Taiwan, Grants MOST No. 108-2923-M-153-001-MY3 and No. 109-2112-M-153-003-. 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 Transmission Electron Microscopy studies were carried out
Предметные рубрики: SOLID-PHASE EXTRACTION
FE3O4 NANOPARTICLES
PROFILE REFINEMENT
Аннотация: This work is devoted to the study of magnetic Fe3O4 nanoparticles doubly coated with carbon. First, Fe3O4@C nanoparticles were synthesized by thermal decomposition. Then these synthesized nanoparticles, 20–30 nm in size were processed in a solution of glucose at 200 °C during 12 h, which led to an unexpected phenomenon – the nanoparticles self-assembled into large conglomerates of a regular shape of about 300 nm in size. The morphology and features of the magnetic properties of the obtained hybrid nanoparticles were characterized by transmission electron microscopy, differential thermo-gravimetric analysis, vibrating sample magnetometer, magnetic circular dichroism and Mössbauer spectroscopy. It was shown that the magnetic core of Fe3O4@C nanoparticles was nano-crystalline, corresponding to the Fe3O4 phase. The Fe3O4@C@C nanoparticles presumably contain Fe3O4 phase (80%) with admixture of maghemite (20%), the thickness of the carbon shell in the first case was of about 2–4 nm. The formation of very large nanoparticle conglomerates with a linear size up to 300 nm and of the same regular shape is a remarkable peculiarity of the Fe3O4@C@C nanoparticles. Adsorption of organic dyes from water by the studied nanoparticles was also studied. The best candidates for the removal of dyes were Fe3O4@C@C nanoparticles. The kinetic data showed that the adsorption processes were associated with the pseudo-second order mechanism for cationic dye methylene blue (MB) and anionic dye Congo red (CR). The equilibrium data were more consistent with the Langmuir isotherm and were perfectly described by the Langmuir–Freundlich model.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Svetlichnyi V. A., Shabalina A. V., Lapin I. N., Goncharova D. A., Velikanov D. A., Sokolov A. Е.
Заглавие : Characterization and magnetic properties study for magnetite nanoparticles obtained by pulsed laser ablation in water
Место публикации : Appl. Phys. A. - 2017. - Vol. 123, Is. 12. - Ст.763. - ISSN 09478396 (ISSN), DOI 10.1007/s00339-017-1390-7
Примечания : Cited References: 40. - This work was conducted as a government task of the Ministry of Education and Science of the Russian Federation, Project Number 3.9604.2017/8.9.
Ключевые слова (''Своб.индексиров.''): magnetite--pulsed laser ablation--nanoparticles--dispersion
Аннотация: Magnetite (Fe3O4) nanoparticles of 1–10 nm (with the maximum at 2 nm) were obtained via pulsed laser ablation of iron target in water in form of a stable dispersion without addition of surfactants and stabilizers. The structure of the material obtained was investigated using transmission electron microscopy, scanning electron microscopy, and Brunauer–Emmett–Teller methods. To investigate the composition of the particles in the sample, such methods as Fourier transform infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, and X-ray diffraction, were applied. Magnetite phase was found to be sufficiently pure, it was not contaminated by other iron oxide phases and contained not more than 0.5% of metallic iron in form of large particles. The study of the magnetic properties of the magnetite nanoparticles obtained has shown that they exhibit ferrimagnetic behavior at room temperature with the paramagnetic contribution explained by the presence of fine superparamagnetic particles.
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13.

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.
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gokhfeld Yu. S., Belskaya N. A., Kazak N. V., Velikanov D. A., Gromilov S. A., Sukhikh A. S., Rudenko V. V., Ovchinnikov S. G.
Заглавие : Charge ordering and magnetiс transitions in Fe1.75V0.25BO4 warwickite
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. H: Magnetism of strongly correlated electron systems. - Ст.H.P12. - P.98-99. - ISBN 978-5-94469-051-7
Примечания : Cited References: 7. - This work was supported by RFBR №20-02-00559, №21-52-1203
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Lin C. R., Chen C. C., Li O., Hsu, Hua-Shu, Ivantsov R. D., Zharkov S. M., Edelman I. S., Velikanov D. A., Ovchinnikov S. G.
Заглавие : Chemically synthesized Cu1-xFexCr2Se4 nanoparticles. Morphology and magnetic properties
Коллективы : International Conference on Magnetism
Место публикации : 20th Int. Conf. on Magnetism (ICM-2015): book of abstracts. - 2015. - Ст.TU.F-P88
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kazakova M. A., Semikolenova N. V., Korovin E. Y., Zhuravlev V. A., Selyutin A. G., Velikanov D. A., Moseenkov S. I., Andreev A. S., Lapina O. B., Suslyaev V. I., Matsko M. A., Zakharov V. A., Lacaillerie J. -B.D.D.
Заглавие : Co/multi-walled carbon nanotubes/polyethylene composites for microwave absorption: Tuning the effectiveness of electromagnetic shielding by varying the components ratio
Место публикации : Compos. Sci. Technol. - 2021. - Vol. 207. - Ст.108731. - ISSN 02663538 (ISSN), DOI 10.1016/j.compscitech.2021.108731
Примечания : Cited References: 45. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the state assignment for Boreskov Institute of Catalysis (project # АААА-А21-121011390054-1)
Аннотация: We present novel polyethylene (PE) composites for electromagnetic interference (EMI) shielding application. They are based on cobalt modified multi-walled carbon nanotubes (MWCNTs) produced via in situ polymerization of ethylene, with the Ti-Ziegler–Natta catalyst preliminarily immobilized on Co/MWCNT hybrids. The electromagnetic properties of the composites were tuned by varying the filler loading and Co:MWCNT ratio. The microstructure of the composites and electromagnetic absorption process were carefully characterized by transmission and scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry, ferromagnetic resonance and vector network analysis. The electromagnetic wave absorbing properties of the nanocomposite were investigated in the 10 MHz−18 GHz frequency range revealing that the EMI absorption properties can be tuned by varying the Co:MWCNT weight ratio in the filler. Interestingly, the Co/MWCNT-PE composite with a total filler and Co loading of only 12 and 1.7 wt%, respectively, showed extremely high reflection loss (RL) of −55 dB. More importantly, an effective bandwidth of 12.8–17.8 GHz (RL below −10 dB) was achieved for a matching thickness of only 1.5 mm. The specific RL value (RL/filler loading) of the composite was superior in comparison with the previously reported nanostructured carbon materials. The highly effective absorbing properties of Co/MWCNT-PE composites are explained primarily by the unprecedented uniform filler distribution in the polyethylene as well as by the synergistic effect of MWCNTs and Co nanoparticles. This approach thus offered an effective strategy to design cost-effective, lightweight and flexible EMI shielding materials with tunable dielectric and magnetic performance.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kazak N. V., Belskaya N. A., Moshkina E. M., Bezmaternykh L. N., Vasiliev A. D., Bartolome J., Arauzo A., Velikanov D. A., Gavrilkin S. Y., Gorev M. V., Patrin G. S., Ovchinnikov S. G.
Заглавие : Co5/3Nb1/3BO4: A new cobalt oxyborate with a complex magnetic structure
Место публикации : J. Magn. Magn. Mater. - 2021. - Vol. 534. - Ст.168056. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2021.168056
Примечания : Cited References: 50. - The authors acknowledge M. Molokeev for the orientating the single crystal for magnetic measurements. The X-ray diffraction and specific heat measurements were carried out in the Common Access Facility Centres of SB RAS (Krasnoyarsk, Russia) and P.N. Lebedev Physical Institute of RAS (Moscow, Russia). This work has been financed by the Russian Foundation for Basic Research (project no. 20-02-00559). We acknowledge financial support from the Spanish MINECO DWARFS project MAT2017-83468-R and Gobierno de Aragón (Group, E12-20R)
Аннотация: Needle-shape single crystals of Co5/3Nb1/3BO4 warwickite were grown using the flux technique. X-ray diffraction measurements have revealed an orthorhombic structure (Sp. Gr. Pbnm) where the octahedral M1 site is occupied by a mixture of Co2+/Nb5+ ions and the M2 site is exclusively filled by Co2+ ions. Using dc magnetization measurements it was established that the new material undergoes two magnetic transitions: an antiferromagnetic transition at TN1 = 27 K and a ferrimagnetic one at TN2 = 14 K, below which a hysteresis cycle opens. Both magnetic transitions are marked by anomalies in the specific heat. High magnetic anisotropy with c-axis as a hard magnetization direction was detected.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrakovskii G. A., Ryabinkina L. I., Kiselev N. I., Velikanov D. A., Bovina A. F., Abramova G. M.
Заглавие : Colossal magnetoresistance of FexMn1-xS magnetic semiconductors
Место публикации : JETP Letters. - 1999. - Vol. 69, Is. 12. - P.949-953. - ISSN 0021-3640, DOI 10.1134/1.568118
Примечания : Cited References: 8
Предметные рубрики: MANGANITES
Аннотация: The magnetic, electric, magnetoresistive, and structural properties are investigated in the sulfide solid solutions FexMn1-xS, which are based on the antiferromagnetic semiconductor alpha-MnS (the fcc NaCl lattice). Colossal negative magnetoresistance (delta(H)similar to-83% at 160 K for x similar to 0.29), comparable to that observed in La-Ca-Mn-O polycrystals and films (delta(H)similar to-90% at 100 K and 40 kOe), is observed in compounds with intermediate concentrations 0.26 x 0.4, corresponding to the region of incipient ferromagnetism. (C) 1999 American Institute of Physics. [S0021-3640(99)01212-8].
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Ryabinkina L. I., Abramova G. M., Romanova O. B., Vorotynov A. M., Velikanov D. A., Kiselev N. I., Balaev A. D.
Заглавие : Conductivity, weak ferromagnetism, and charge instability in an alpha-MnS single crystal
Разночтения заглавия :авие SCOPUS: Conductivity, weak ferromagnetism, and charge instability in an α-MnS single crystal; авие SCOPUS: Conductivity, weak ferromagnetism, and charge instability in an ?-MnS single crystal
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2005. - Vol. 71, Is. 12. - Ст.125204. - ISSN 1098-0121, DOI 10.1103/PhysRevB.71.125204; Phys. Rev. B Condens. Matter Mater. Phys. - 2005. - Vol. 71, Is. 12. - Ст.125204. - Вариант Sopus
Примечания : Cited References: 11
Предметные рубрики: MANGANITES
Ключевые слова (''Своб.индексиров.''): ferromagnetic material--manganese derivative--absorption spectroscopy--article--calculation--conductance--crystal--electron spin resonance--hybridization--magnetic field--magnetism--measurement--molecular interaction--temperature dependence--temperature measurement--ferromagnetic material--manganese derivative--absorption spectroscopy--article--calculation--conductance--crystal--electron spin resonance--hybridization--magnetic field--magnetism--measurement--molecular interaction--temperature dependence--temperature measurement
Аннотация: The temperature dependence of resistivity, magnetization, and electron-spin resonance of the α-MnS single crystal were measured in temperature range of 5 K T 550 K. Magnetization hysteresis in an applied magnetic field up to 0.7 T at T
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Saikova, Svetlana, Pavlikov, Aleksandr, Karpov, Denis, Samoilo, Aleksandr, Kirik, Sergey, Volochaev M. N., Trofimova, Tatyana, Velikanov D. A., Kuklin, Artem
Заглавие : Copper ferrite nanoparticles synthesized using anion-exchange Resin: Influence of synthesis parameters on the cubic phase stability
Место публикации : Materials. - 2023. - Vol. 16, Is. 6. - Ст.2318. - ISSN 19961944 (eISSN), DOI 10.3390/ma16062318
Примечания : Cited References: 67. - The Russian team acknowledges the support of the Russian Science Foundation (Project 22-73-10047)
Аннотация: Copper ferrite is of great interest to researchers as a material with unique magnetic, optical, catalytic, and structural properties. In particular, the magnetic properties of this material are structurally sensitive and can be tuned by changing the distribution of Cu and Fe cations in octahedral and tetrahedral positions by controlling the synthesis parameters. In this study, we propose a new, simple, and convenient method for the synthesis of copper ferrite nanoparticles using a strongly basic anion-exchange resin in the OH form. The effect and possible mechanism of polysaccharide addition on the elemental composition, yield, and particle size of CuFe2O4 are investigated and discussed. It is shown that anion-exchange resin precipitation leads to a mixture of unstable cubic (c-CuFe2O4) phases at standard temperature and stable tetragonal (t-CuFe2O4) phases. The effect of reaction conditions on the stability of c-CuFe2O4 is studied by temperature-dependent XRD measurements and discussed in terms of cation distribution, cooperative Jahn–Teller distortion, and Cu2+ and oxygen vacancies in the copper ferrite lattice. The observed differences in the values of the saturation magnetization and coercivity of the prepared samples are explained in terms of variations in the particle size and structural properties of copper ferrite.
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