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Magnetic anisotropy in Fe films deposited on SiO2/Si(001) and Si(001) substrates / S. V. Komogortsev [et al.] // J. Magn. Magn. Mater. - 2014. - Vol. 351. - P. 104-108, DOI 10.1016/j.jmmm.2013.09.058. - Cited References: 40. - The work has been supported by RFBR Grant 11-03-00168-a, 12-02-00943-a, 13-02-01265-a, Interdisciplinary integration of fundamental research of SB RAS (2012-2014) project No. 64. Also the study was supported by The Ministry of Education and Science of Russian Federation, project 14.513.11.0016. . - ISSN 0304-8853. - ISSN 873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
UNIAXIAL ANISOTROPY
   SURFACE
   SILICON
   ROUGHNESS
Кл.слова (ненормированные):
Epitaxial growth -- Iron -- Magnetic anisotropy -- Thin film
Аннотация: The magnetic anisotropy of 10 nm iron films deposited in an ultra high vacuum on the Si(001) surface and on the Si(001) over caped by 1.5 nm layer of SiO2 was investigated. There is in-plane uniaxial magnetic anisotropy caused by oblique sputtering in the Fe films on a SiO2 buffer layer. The easy magnetization axis is always normal to the atomic flux direction but the value of the anisotropy field is different depending on the axial angle among sputtering direction and the substrate crystallographic axes. It is argued that the uniaxial magnetic anisotropy results from elongated surface roughness formation during film deposition. Several easy magnetization axes are found in Fe/Si(001) film without the SiO2 buffer layer. The mutual orientation of the main easy axes and Si crystallographic axes indicates that there is epitaxial growth of Fe/Si(001) film with the following orientation relative to the substrate: Fe[100] ?Si[110]. The anisotropy energy of Fe/Si(001) film is estimated by simulation of angle dependence of remnant magnetization m r as the sum of the mr angle plot from uniaxial anisotropy (induced by oblique deposition) and the polar plot from biaxial magnetocrystalline anisotropy. В© 2013 Elsevier B.V.

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Держатели документа:
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660000, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Satsuk, S. A.; Сацук, Светлана Александровна; Yakovlev, I. A.; Яковлев, Иван Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Belyaev, B. A.
FMR study of the anisotropic properties of an epitaxial Fe3Si film on a Si(111) vicinal surface / B. A. Belyaev, A. V. Izotov // JETP Letters. - 2016. - Vol. 103, Is. 1. - P. 41-45, DOI 10.1134/S0021364016010033. - Cited References: 28 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
Thin magnetic-films
   Ferromagnetic-resonance
   Cobalt films
   Metal-films
   Spectrometer
   Spintronics
   Roughness
Аннотация: The anisotropic characteristics of an iron silicide (Fe3Si) epitaxial thin magnetic film grown on a Si(111) silicon vicinal surface with a misorientation angle of 0.14° have been measured by the ferromagnetic resonance method. It has been shown that the polar and azimuth misorientation angles of the crystallographic plane of the substrate can be determined simultaneously from the angular dependences of the ferromagnetic resonance field of the epitaxial film. The effective saturation magnetization of the film M eff = 1105 G and the constant of the cubic magnetocrystalline anisotropy K 4 = 1.15 × 105 erg/cm3 have been determined. The misorientation of the substrate plane leads to the formation of steps on the film surface and, as a result, to the appearance of uniaxial magnetic anisotropy of the magnetic dipole nature with the constant K 2 = 796 erg/cm3. Small unidirectional magnetic anisotropy (K 1 = 163 erg/cm3), which may be associated with symmetry breaking on the steps of the film and is due to the Dzyaloshinskii–Moriya interaction, has been detected.

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Публикация на русском языке Беляев, Борис Афанасьевич. Исследование методом ФМР анизотропных свойств эпитаксиальной пленки Fe3Si на вицинальной поверхности Si(111) [Текст] / Б. А. Беляев, А. В. Изотов // Письма в "Журнал экспериментальной и теоретической физики". - Москва : Наука, 2016. - Т. 103 Вып. 1-2. - С. 44-49

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Беляев, Борис Афанасьевич
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Temperature-dependent magnetization reversal in exchange bias NiFe/IrMn/NiFe structures / C. Gritsenko [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 482. - P. 370-375, DOI 10.1016/j.jmmm.2019.03.044. - Cited References: 55. - Ch. G. and M. G. acknowledge financial support by the Russian Foundation for Basic Research (RFBR grant. 17-32-50170). Ch. G. acknowledges the 5 top 100 Russian Academic Excellence Project at the Immanuel Kant Baltic Federal University. O.A.T. acknowledges support by the Grants-in-Aid for Scientific Research (Grant Nos. 17 K05511 and 17H05173) from MEXT, Japan, by the grant of the Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University, by JSPS and RFBR under the Japan-Russian Research Cooperative Program. V.R. acknowledges the Ministry of Education and Science of the Russian Federation in the framework of government assignment 3.9002.2017/6.7. Electron microscopy examination was carried out at the Center for Collective Use of the Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences. We also thank Montserrat Rivas for helpful discussions. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
COERCIVITY
   FILM
   ROUGHNESS
   THICKNESS
   HEADS
   IRMN
Кл.слова (ненормированные):
Magnetization reversal -- Exchange bias -- Permalloy
Аннотация: We demonstrate magnetization reversal features in NiFe/IrMn/NiFe thin-film structures with 40% and 75% relative content of Ni in Permalloy in the temperature range from 80 K to 300 K. The magnetization reversal sequence of the two ferromagnetic layers is found to depend on the type of NiFe alloy. In the samples with 75% relative content of Ni, the bottom ferromagnetic layer reverses prior to the top one. On the contrary, in the samples with 40% of Ni, the top ferromagnetic layer reverses prior to the bottom one. These tendencies of magnetization reversal are preserved in the entire range of temperatures. These distinctions can be explained by the morphological and structural differences of interfaces in the samples based on two types of Permalloy.

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Держатели документа:
Immanuel Kant Baltic Fed Univ, A Nevskogo 14, Kaliningrad 236041, Russia.
Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Leninskie Gory 1, Moscow 119991, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akad Gorodok 50-38, Krasnoyarsk 660036, Russia.
Natl Univ Sci & Technol MISiS, Leninsky Prospect 4, Moscow 119049, Russia.
Lomonosov Moscow State Univ, Fac Phys, Leninskie Gory 1-2, Moscow 119991, Russia.
Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia.
Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
Tohoku Univ, Ctr Sci & Innovat Spintron, Sendai, Miyagi 9808577, Japan.

Доп.точки доступа:
Gritsenko, C.h.; Dzhun, I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Gorshenkov, M.; Babaytsev, G.; Chechenin, N.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Tretiakov, Oleg A.; Rodionova, V.; Russian Foundation for Basic Research (RFBR) [17-32-50170]; MEXT, Japan [17 K05511, 17H05173]; Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University; JSPS; RFBR under the Japan-Russian Research Cooperative Program; Ministry of Education and Science of the Russian Federation [3.9002.2017/6.7]
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Experimental study of the magnetic characteristics of nanocrystalline thin films: the role of edge effects / B. A. Belyaev [et al.] // Mater. Res. Express. - 2019. - Vol. 6, Is. 11. - Ст. 116105, DOI 10.1088/2053-1591/ab4456. - Cited References: 37. - This work was supported by RFBR according to the research project no. 18-32-00086 and by the Ministry of Science and Higher Education of the Russian Federation no. 3.1031.2017/PCh. . - ISSN 2053-1591

РУБ Materials Science, Multidisciplinary
Рубрики:
FERROMAGNETIC-RESONANCE
   ANISOTROPIES
   ROUGHNESS
   SUBSTRATE
Кл.слова (ненормированные):
magnetic anisotropy -- ferromagnetic resonance -- nanocrystalline film -- soft magnetic film -- thin film edges
Аннотация: Magnetic characteristics and their spatial distribution of magnetron sputtered nanocrystalline NiFe thin films of various compositions were investigated by ferromagnetic resonance (FMR) and magneto-optical Kerr effect microscopy. A sharp increase in the FMR line width and a strong deviation of the uniaxial magnetic anisotropy field were observed near the film edges. It was shown that the observed magnetic anisotropy behavior can be explained by assuming that besides the field-induced uniaxial magnetic anisotropy an additional source of the uniaxial anisotropy near the film edges exists, with the easy axis parallel to the edges. The possible origins of this additional contribution were discussed.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 66041, Russia.

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Izotov, A. V.; Изотов, Андрей Викторович; Skomorokhov, G. V.; Скоморохов, Георгий Витальевич; Solovev, P. N.; Соловьев, Платон Николаевич; RFBRRussian Foundation for Basic Research (RFBR) [18-32-00086]; Ministry of Science and Higher Education of the Russian Federation [3.1031.2017/PCh]
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Muzalevskiy, K. V.
Application of Sentinel-1B polarimetric observations to soil moisture retrieval using neural networks: Case study for bare Siberian chernozem soil / K. Muzalevskiy, A. Zeyliger // Remote Sens. - 2021. - Vol. 13, Is. 17. - Ст. 3480, DOI 10.3390/rs13173480. - Cited References: 21. - This work was supported by the Russian Foundation for Basic Research (grant No. 19-29-05261 mk). The field experiment and EC-5 Decagon sensor calibration in laboratory conditions were carried out with the support of Ministry of Science and Higher Education of the Russian Federation, project No. 0287-2021-0034 (basic state assignment) . - ISSN 2072-4292

РУБ Environmental Sciences + Geosciences, Multidisciplinary + Remote Sensing + Imaging Science & Photographic Technology
Рубрики:
SURFACE
   MODEL
   PARAMETERS
   ROUGHNESS
   INVERSION
   DUBOIS
   IEM
   OH
Кл.слова (ненормированные):
microwave remote sensing -- Sentinel-1 -- bare soil -- soil moisture -- soil permittivity
Аннотация: Sentinel-1 is currently the only synthetic-aperture radar, which radar measurements of the earth’s surface to be carried out, regardless of weather conditions, with high resolution up to 5–40 m and high periodicity from several to 12 days. Sentinel-1 creates a technological platform for the development of new globally remote sensing algorithms of soil moisture, not only for hydrological and climatic model applications, but also on a single field scale for individual farms in precision farming systems used. In this paper, the potential of soil moisture remote sensing using polarimetric Sentinel-1B backscattering observations was studied. As a test site, the fallow agricultural field with bare soil near the Minino village (56.0865°N, 92.6772°E), Krasnoyarsk region, the Russian Federation, was chosen. The relationship between the cross-polarized ratio, reflectivity, and the soil surface roughness established Oh used as a basis for developing the algorithm of soil moisture retrieval with neural networks (NNs) computational model. Two NNs is used as a universal regression technique to establish the relationship between scattering anisotropy, entropy and backscattering coefficients measured by the Sentinel-1B on the one hand and reflectivity on the other. Finally, the soil moisture was found from the soil reflectivity in solving the inverse problem using the Mironov dielectric model. During the field campaign from 21 May to 25 August 2020, it was shown that the proposed approach allows us to predict soil moisture values in the layer thickness of 0.00–0.05 m with the root-mean-square error and determination coefficient not worse than 3% and 0.726, respectively. The validity of the proposed approach needs additional verification on a wider dataset using soils of different textures, a wide range of variations in soil surface roughness, and moisture.

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Держатели документа:
Russian Acad Sci, Lab Radiophys Earth Remote Sensing, Kirensky Inst Phys, Fed Res Ctr KSC,Siberian Branch, Krasnoyarsk 630090, Russia.
Russian State Agr Univ, Dept Appl Informat, Moscow Timiryazev Agr Acad, Moscow 127550, Russia.

Доп.точки доступа:
Zeyliger, Anatoly; Музалевский, Константин Викторович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-29-05261 mk]; Ministry of Science and Higher Education of the Russian Federation [0287-2021-0034]
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