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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Baron F. A., Mikhlin, Yurii L., Molokeev M. S., Rautskiy M. V., Tarasov I. A., Volochaev M. N., Shanidze L. V., Lukyanenko A. V., Smolyarova T. E., Konovalov, Stepan O., Zelenov, Fyodor, V, Tarasov A. S., Volkov N. V.
Заглавие : Structural, optical, and electronic properties of Cu-doped TiNxOy grown by ammonothermal atomic layer deposition
Коллективы : RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science [20-42-240013]; Government of the Russian Federation for Creation of World Tier Laboratories [075-15-2019-1886]
Место публикации : ACS Appl. Mater. Interfaces. - 2021. - Vol. 13, Is. 27. - P.32531-32541. - ISSN 1944-8244, DOI 10.1021/acsami.1c08036. - ISSN 1944-8252(eISSN)
Примечания : Cited References: 69. - This research was funded by the RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science (project code 20-42-240013) and by the grant of the Government of the Russian Federation for Creation of World Tier Laboratories (contract no. 075-15-2019-1886)
Предметные рубрики: OXYNITRIDE THIN-FILMS
TITANIUM-NITRIDE
CONFORMAL TIN
Аннотация: Copper-doped titanium oxynitride (TiNxOy) thin films were grown by atomic layer deposition (ALD) using the TiCl4 precursor, NH3, and O2 at 420 °C. Forming gas was used to reduce the background oxygen concentration and to transfer the copper atoms in an ALD chamber prior to the growth initiation of Cu-doped TiNxOy. Such forming gas-mediated Cu-doping of TiNxOy films had a pronounced effect on their resistivity, which dropped from 484 ± 8 to 202 ± 4 μΩ cm, and also on the resistance temperature coefficient (TCR), which decreased from 1000 to 150 ppm °C–1. We explored physical mechanisms causing this reduction by performing comparative analysis of atomic force microscopy, X-ray photoemission spectroscopy, X-ray diffraction, optical spectra, low-temperature transport, and Hall measurement data for the samples grown with and without forming gas doping. The difference in the oxygen concentration between the films did not exceed 6%. Copper segregated to the TiNxOy surface where its concentration reached 0.72%, but its penetration depth was less than 10 nm. Pronounced effects of the copper doping by forming gas included the TiNxOy film crystallite average size decrease from 57–59 to 32–34 nm, considerably finer surface granularity, electron concentration increase from 2.2(3) × 1022 to 3.5(1) × 1022 cm–3, and the electron mobility improvement from 0.56(4) to 0.92(2) cm2 V–1 s–1. The DC resistivity versus temperature R(T) measurements from 4.2 to 300 K showed a Cu-induced phase transition from a disordered to semimetallic state. The resistivity of Cu-doped TiNxOy films decreased with the temperature increase at low temperatures and reached the minimum near T = 50 K revealing signatures of the quantum interference effects similar to 2D Cu thin films, and then, semimetallic behavior was observed at higher temperatures. In TiNxOy films grown without forming gas, the resistivity decreased with the temperature increase as R(T) = – 1.88T0.6 + 604 μΩ cm with no semimetallic behavior observed. The medium range resistivity and low TCR of Cu-doped TiNxOy make this material an attractive choice for improved matching resistors in RF analog circuits and Si complementary metal–oxide–semiconductor integrated circuits.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Lyashchenko S. A., Yakovlev I. A., Tarasov A. S., Shevtsov D. V., Varnakov S. N., Ovchinnikov S. G., Farle M.
Заглавие : Features of MagMAX thin film deposition techniques
Коллективы : International workshop on functional MAX-materials, Kirensky Institute of Physics, Siberian Federal Univercity
Место публикации : International workshop on the properties of functional MAX-materials (2nd FunMax): book of abstracts/ org. com. M. Farle [et al.]. - 2021. - P.14
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Solovev P. N., Izotov A. V., Belyaev B. A.
Заглавие : Numerical study of structural and magnetic properties of thin films obliquely deposited on rippled substrates
Коллективы : RFBRRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund; JSC 'NPP Radiosviaz' [20-42-242901]
Место публикации : J. Phys.: Condens. Matter. - 2021. - Vol. 33, Is. 49. - Ст.495802. - ISSN 0953-8984, DOI 10.1088/1361-648X/ac26fc. - ISSN 1361-648X(eISSN)
Примечания : Cited References: 35. - The reported study was funded by RFBR, the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund and JSC 'NPP Radiosviaz', Project Number 20-42-242901
Предметные рубрики: SIMULATION
ANISOTROPY
GROWTH
Аннотация: Structural modulation in thin films plays a substantial role in the formation of their magnetic properties. By producing topographic patterns in thin films, it is possible to engineer their magnetic response. Here, we report on the numerical study of the relationship between structural and static magnetic properties of thin films obliquely deposited on substrates with the sinusoidal surface. 3D Monte Carlo film growth simulations show that, under certain deposition conditions, an inhomogeneous columnar morphology can form in the films caused by the shadowing effect and the rippled substrate. Calculations of the demagnetizing tensors for these films demonstrate that their columnar structure is the source of the shape-induced uniaxial magnetic anisotropy that varies nonmonotonically with the deposition angle. Micromagnetic simulations of the generated films confirm the uniaxial character of the shape-induced anisotropy, and also show that magnetization reversal occurs via an incoherent rotation of magnetic moments.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzovnikova L. A., Denisova E. A., Nemtsev I. V., Iskhakov R. S., Komogortsev S. V., Kuzovnikov A. A., Maltsev V. K., Shepeta N. A.
Заглавие : Magnetostructural study of nanostructured and amorphous bulk alloys (Co–P)100–xCux
Место публикации : J. Struct. Chem. - 2021. - Vol. 62, Is. 5. - P.802-809. - ISSN 00224766 (ISSN), DOI 10.1134/S0022476621050164
Примечания : Cited References: 19. - The study was supported by RFBR, the Government of the Krasnoyarsk Region, and the Krasnoyarsk Regional Science Foundation within project No. 20-43-240003
Аннотация: The work reports a magnetostructural study of bulk nanostructured composite materials Co–P/Cu prepared by dynamic compaction (DC) and uniaxial cold pressing (CP). The initial particles with amorphous and crystalline structure are synthesized by chemical deposition. Magnetic characteristics of composites (saturation magnetization, Bloch constant, local anisotropy field, ferro-magnetic resonance line width, coercive force) are studied. The phase compositions of initial composite particles and compacts prepared by two methods (DC and CP) are determined from the anisotropy field and the Bloch constant values using magnetic phase analysis. It is shown that the use of composite particles in dynamic compaction allows obtaining homogeneous nanostructured bulk materials while preserving magnetic characteristics of initial powders.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chzhan A. V., Podorozhnyak S. A., Zharkov S. M., Gromilov S. A., Patrin G. S.
Заглавие : Induced magnetic anisotropy of Co-P thin films obtained by electroless deposition
Место публикации : J. Magn. Magn. Mater. - 2021. - Vol. 537. - Ст.168129. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2021.168129
Примечания : Cited References: 28. - The work is partially supported by the RFBR Foundation (10-02-00161-a project). The study has been carried out within the framework of the state task of the Ministry of science and higher education of the Russian Federation (topic No. FSRZ-2020-0011)
Аннотация: Co1−x-Px films (x = 0.02–0.05) deposited on cover glass by electroless plating from aqueous solutions in a continuous magnetic field with the strength of 2.5 kOe are presented. It has been found that in the pH range from 7.2 to 9.3, two special areas can be distinguished, they are characterized by the deposition of films with qualitatively different parameters in them. So, the change of the pH of working solutions from 7.2 to 8.7 causes the increase in the value of the induced magnetic anisotropy constant KU from 2.5 × 105 erg/cm3 to 6 × 105 erg/cm3. If the value of the hydrogen index is still increasing, an uneven drop to 5 × 104 erg/cm3 is observed. In the same way, the coercivity HC changes; at first it grows from 700 Oe to 1.5 kOe, and then it drops to Oe units. The concentration of phosphorus in the range of 7.2 to 8.7 increases linearly from 2 to 3 wt%, and in the range of 8.7 to 9.3, it increases from 3 to 5 wt%. The x-ray diffraction data show that the samples obtained at pH8.7 are characterized by the presence of the hcp phase of Co (α-Co). The observed reflections of films obtained at pH 8.7 indicate the fcc-Co (β-Co) with the diffraction peak blurring: the greater the pH value of the samples obtained, the more the diffraction peak blurring. It is shown that the induced magnetic anisotropy in high-coercivity films relates to the modification of the Co lattice. The lattice passes from a distorted fcc to an hcp structure during the growth of crystallites in a magnetic field. The induced magnetic anisotropy appears in films that were obtained in the high pH field due to the ordering of magnetic ions pairs.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Komogortsev S. V., Nemtsev I. V., Iskhakov R. S., Dolgopolova M. V.
Заглавие : Iron-cobalt coatings produced using an eco-friendly route
Место публикации : J. Supercond. Nov. Magn. - 2021. - Vol. 34, Is. 10. - P.2681-2688. - ISSN 1557-1939, DOI 10.1007/s10948-021-05964-1. - ISSN 1557-1947(eISSN)
Примечания : Cited References: 35. - This work was funded by the Russian Foundation for Basic Research, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-43-240003
Предметные рубрики: MAGNETIC-PROPERTIES
FECO FILMS
THIN-FILMS
CO-FE
ELECTRODEPOSITION
Аннотация: A facile, low-cost, and green route for synthesis of high-induction Fe-Co coatings was developed. Within this approach, three natural reducing agents have been used for deposition of the metal coatings by electroless plating on dielectric and metallic substrates: arabinogalactan, starch, and sucrose. The Fe-Co alloy coatings with Co content from 0 to 94 at.% are nanocrystalline bcc solid solution with carbon additive no more than 2 at%, and pure Co coatings are of hcp structure. The magnetic properties of bcc-based iron-cobalt alloys have been investigated as a function of the atomic composition. A high-saturation magnetization of about 240 emu/g was obtained for Fe70Co30 alloy films deposited onto copper substrate. The local magnetic anisotropy of FeCo alloys increases with a decrease in iron content for all reducing agents. High magnetization close to those in the bulk Fe-Co alloys implies the prospective applications of synthesized Fe-Co coatings as magnetic shield and magnetic sensors.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Komogortsev S. V., Rautskii M. V., Nemtsev I. V., Iskhakov R. S., Tkachev V. V., Plotnikov V. S., Dolgopolova M. V.
Заглавие : Core-shell and Bi-segmented cobalt-nickel nanorods prepared by electroless deposition
Коллективы : IEEE International Magnetics Conference
Место публикации : IEEE International Magnetics Virtual Conference (INTERMAG'21): Digest book. - 2021. - P.1342
Примечания : Cited References: 2. - This work was funded by the RFBR, the Government of the Krasnoyarsk Territory, the KRFS (project no. 20-43-240003)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Харченко И. А., Симунин, Михаил Максимович, Лукьяненко, Анна Витальевна, Рыжков И. И.
Заглавие : Получение углеродных пленок на сапфире с помощью химического осаждения из газовой фазы и их исcледование
Коллективы : "Решетневские чтения", международная научно-практическая конференция, Сибирский государственный университет науки и технологий им. акад. М. Ф. Решетнева, Информационные спутниковые системы им. М.Ф. Решетнева, ОАО, "Красноярский машиностроительный завод", ОАО, Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук"
Место публикации : Решетневские чтения: материалы XXV междунар. науч.-практ. конф. : в 2-х ч. - Красноярск, 2021. - Ч. 1. - С. 674-676
Примечания : Библиогр.: 5. - Работа выполнена при финансовой поддержке РФФИ, проект № 18-29-19078 мк. Физико–химический анализ материалов был выполнен в Красноярском региональном центре коллективного пользования ФИЦ КНЦ СО РАН
Аннотация: Проведено экспериментальное исследование процесса формирование углеродных слоев на сапфировой подложке методом CVD. Представлены результаты, полученные с помощью атомно-силовой микроскопии.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pazniak H., Stevens M., Dahlqvist M., Zingsem B., Kibkalo L., Felek M., Varnakov S. N., Farle M., Rosen J., Wiedwald U.
Заглавие : Phase stability of nanolaminated epitaxial (Cr1-xFex)2AlC MAX phase thin films on MgO(111) and Al2O3(0001) for use as conductive coatings
Место публикации : ACS Appl. Nano Mat. - 2021. - Vol. 4, Is. 12. - P.13761-13770. - ISSN 25740970 (ISSN), DOI 10.1021/acsanm.1c03166
Примечания : Cited References: 51. - This work has been supported by the Deutsche Forschungsgemeinschaft (DFG) within CRC/TRR 270, project B02 (Project-ID 405553726). The calculations were carried out using supercomputer resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputer Centre (NSC) and the High Performance Computing Center North (HPC2N) partially funded by the Swedish Research Council through grant agreement no. 2018-05973. J.R. acknowledges funding from the Knut and Alice Wallenberg Foundation. Support by the Interdisciplinary Center for Analytics on the Nanoscale (ICAN) of the University of Duisburg-Essen (DFG RIsources reference: RI_00313), a DFG-funded core facility (Project nos. 233512597 and 324659309), is gratefully acknowledged. M.F. acknowledges co-funding by the government of the Russian Federation (agreement no. 075-15-2019-1886)
Аннотация: In this study, we model the chemical stability in the (Cr1-xFex)2AlC MAX phase system using density functional theory, predicting its phase stability for 0 ‹ x ‹ 0.2. Following the calculations, we have successfully synthesized nanolaminated (Cr1-xFex)2AlC MAX phase thin films with target Fe contents of x = 0.1 and x = 0.2 by pulsed laser deposition using elemental targets on MgO(111) and Al2O3(0001) substrates at 600 °C. Structural investigations by X-ray diffraction and transmission electron microscopy reveal MAX phase epitaxial films on both substrates with a coexisting (Fe,Cr)5Al8 intermetallic secondary phase. Experiments suggest an actual maximum Fe solubility of 3.4 at %, corresponding to (Cr0.932Fe0.068)2AlC, which is the highest Fe doping level achieved so far in volume materials and thin films. Residual Fe is continuously distributed in the (Fe,Cr)5Al8 intermetallic secondary phase. The incorporation of Fe results in the slight reduction of the c lattice parameter, while the a lattice parameter remains unchanged. The nanolaminated (Cr0.932Fe0.068)2AlC thin films show a metallic behavior and can serve as promising candidates for highly conductive coatings.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Komogortsev S. V., Rautsky M. V., Nemtsev I. V., Iskhakov R. S., Plotnikov V. S., Tkachev V. V., Li O. A., Dolgopolova M. V.
Заглавие : Core-shell and bi-segmented cobalt-nickel nanorods prepared by electroless deposition
Место публикации : IEEE Trans. Magn. - 2022. - Vol. 58, Is. 2. - Ст.2300805. - ISSN 00189464 (ISSN), DOI 10.1109/TMAG.2021.3098747
Примечания : Cited References: 27. - This work was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-43-240003. The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center“ Krasnoyarsk Science Center SB RAS” for the provided equipment
Аннотация: A porous polymer loaded with segmented nanorods of magnetic metal is very promising for the design of novel microwave devices. Arrays of bi-segmented Ni/Co and core-shell Ni@Co rods were prepared by electroless deposition into porous of polycarbonate track etched membrane. An intrinsic effective magnetic field of the magnetic composite nanorods aligned in the nonmagnetic template was studied by magnetization curves and ferromagnetic resonance. The effect of the interface boundaries for two types of bi-segmented rods with coaxial and along-axis Co/Ni segmentation to effective field was established.
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