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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Kononov V. P., Ovchinnikov S. G.
Заглавие : Anisotropy characteristics in a Permalloy film induced by a nonuniform magnetic field
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1998. - Vol. 40, Is. 7. - P1175-1177. - ISSN 1063-7834, DOI 10.1134/1.1130513
Примечания : Cited References: 3
Аннотация: Inhomogeneities were observed for the first time in the magnetic structure of a thin Permalloy film, induced by a strongly nonuniform magnetic field applied in the plane of the substrate during fabrication of the samples. The films were obtained by vacuum deposition using a molecular-beam epitaxy system. A nonuniform field was created on the substrate using four samarium-cobalt magnets. The anisotropy of local sections of the samples was measured using a scanning-ferromagnetic-resonance spectrometer. A strong correlation was observed between the distribution of the magnitude and direction of the local magnetic anisotropy of the film and the magnetic-field distribution in the plane of the substrate. (C) 1998 American Institute of Physics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Izotov A. V., Solovev P. N.
Заглавие : Competing magnetic anisotropies in obliquely deposited thin permalloy film
Место публикации : Physica B. - 2016. - Vol. 481. - P.86-90. - ISSN 0921-4526, DOI 10.1016/j.physb.2015.10.036
Примечания : Cited References: 31. - This study was supported by the Ministry of Education and Science of the Russian Federation, task no. 3.528.2014K
Предметные рубрики: FERROMAGNETIC-RESONANCE
MICROMAGNETIC CALCULATION
Ключевые слова (''Своб.индексиров.''): thin film--magnetic anisotropy--oblique deposition--ferromagnetic resonance--micromagnetic simulation
Аннотация: Distribution of the magnetic anisotropy in thin film prepared by thermal vacuum oblique deposition of permalloy with small off-normal angle of incident in the presence of an external magnetic field has been studied by ferromagnetic resonance technique. On local area of the sample, a mutual compensation of near orthogonal in-plane uniaxial magnetic anisotropies induced by oblique deposition and by applied magnetic field has been found. Moreover, in addition to the uniaxial (twofold) magnetic anisotropy, fourfold and sixfold magnetic anisotropies have been observed in the sample. To explain the obtained high-order anisotropies, we assumed that the sample has exchange coupled adjacent regions or phases with different parameters of magnetic anisotropy. The results of the micromagnetic analysis of a two-layer model of the sample confirm the hypothesis. © 2015 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Boev N. M., Izotov A. V., Solovev P. N.
Заглавие : Domain structure and magnetization reversal in multilayer structures consisting of thin permalloy films separated with nonmagnetic interlayers
Коллективы : Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
Место публикации : Russ. Phys. J. - 2021. - Vol. 64, Is. 6. - P.1160-1167. - ISSN 1064-8887, DOI 10.1007/s11182-021-02436-w. - ISSN 1573-9228(eISSN)
Примечания : Cited References: 30. - This work was financially supported by the Ministry of Science and Higher Education under agreement No. 075-11-2019-054 November 22, 2019
Предметные рубрики: MICROMAGNETIC CALCULATION
MAGNETOMETER
SIMULATION
NOISE
Аннотация: Using numerical micromagnetic modeling, we have investigated the development of domain structure and magnetization reversal in multilayer thin-film structures. The permalloy (Ni80Fe20) magnetic layers had the inplane uniaxial and perpendicular magnetic anisotropy. We found that as the thickness of nonmagnetic interlayers decreases, the in-plane configuration of magnetic moments in the permalloy layers transforms from a single domain state to stripe domains, which is caused by the increase of magnetostatic interaction between layers. In structures with "thick" interlayers, even weak magnetostatic interaction enforces the neighboring single domain permalloy layers to have opposite orientations of magnetic moments. The saturation field of such samples increases linearly with the number of layers. By analyzing the dynamic characteristics of multilayers, we determined the optimum number of layers ensuring the maximum conversion efficiency of wideband microwave microstrip sensors of weak magnetic fields.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Drokin N. A.
Заглавие : Impedance spectra of thin permalloy films with a nanoisland structure
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 2. - P.360-367. - ISSN 1063-7834, DOI 10.1134/S1063783412020084
Примечания : Cited References: 20. - This study was supported by the Russian Federal Targeted Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia in 2009-2013," the Siberian Branch of the Russian Academy of Sciences (Integration research project no. 5), and the Presidium of the Russian Academy of Sciences (project no. 21.1).
Предметные рубрики: CAPACITANCE
Аннотация: The behavior of the impedance spectra of island permalloy films prepared through vacuum evaporation onto optically polished glass-ceramic substrates has been investigated in the frequency range from 0.0001 to 100 MHz. A resistor-capacitor model of the films has been developed and the model parameters, for which there is a good agreement with experimental data on the frequency dependences of the real and imaginary components of the impedance, have been determined. The specific features in the behavior of the electrical and physical characteristics with variations in the thickness of the sample and the gap between the measuring electrodes have been investigated. It has been found that the relative permittivity of the films under investigation reaches values E similar to 10(7)-10(8). The structural relaxation times have been calculated.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Polyakov V.V.
Заглавие : Influence of the unidirectional anisotropy on magnetic noise in permalloy films
Коллективы : "Functional Materials", International Conference
Место публикации : International Conference "Functional Materials" (ICFM-09): book of abstracts : October 5-10, Ukraine, Crimea, Partenit. - 2009. - С. 113
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Boev N. M., Gorchakovsky A. A., Galeev R. G.
Заглавие : Inspection probes of a ferromagnetic resonance scanning spectrometer
Место публикации : Instrum. Exp. Tech. - 2021. - Vol. 64, Is. 2. - P.277-284. - ISSN 00204412 (ISSN), DOI 10.1134/S0020441221010218
Примечания : Cited References: 24. - This study was supported by the Ministry of Science and Higher Education of the Russian Federation as part of a complex project on the development of high-technology production facilities (agreement no. 075-11-2019-054, November 22, 2019)
Аннотация: The design of inspection probes for a scanning ferromagnetic resonance spectrometer, which are designed for recording the absorption spectra of electromagnetic energy by local areas of thin magnetic films, is described. The degree of locality is determined by the diameter of the measuring hole of the probe in the range of 0.1–1.0 mm. The sensitivity of the device is significantly increased due to the miniaturization of the heterogeneous measuring resonator and its comparatively high Q factor. A set of replaceable probes makes it possible to cover the frequency range of 0.1–6.0 GHz, the signal-to-noise ratio for a probe with a hole diameter of 0.8 mm, which was measured on a permalloy film with a thickness of 5 nm, is at least 20 dB.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prokopenko V. S., Kim P. D., Orlov V. A., Vasiliev B. V., Vovk D.K, Zatsepilin S. T., Rudenko R. Y.
Заглавие : Lorentz microscopy of permalloy film microdots
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2013. - Vol. 6, Is. 2. - P.262-269. - ISSN 1997-1397; Журн. СФУ. Сер. "Математика и физика"
Ключевые слова (''Своб.индексиров.''): microdot--magnetic vortex--bloch point--magnetic reversal--наноточка--магнитный вихрь--точка блоха--перемагничивание
Аннотация: The results of an investigation into square permalloy ﬁlm microdots with a quasivortical magnetic structure by the method of Lorentz electron microscopy are presented. The found before mechanism of the switching of microdot chirality in homogeneous plane magnetic ﬁeld is discussed. The calculations are performed to evaluate the interaction of microdots under switching chirality.Приводятся результаты изучения методом лоренцевой электронной микроскопии квадратных пермаллоевых плёночных микропятен с квазивихревой магнитной структурой. Обсуждается механизм обнаруженного ранее эффекта переключения киральности пятна в однородном плоскостном магнитном поле. Выполнен расчёт по оценке взаимного влияния микропятен при переключении киральности.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pasynkova A. A., Lepalovskii V. N., Svalov A. V., Volochaev M. N., Kurlyandskaya G. V.
Заглавие : Magnetic properties and peculiarities of the domain structure of multilayer permalloy-based GMI elements
Место публикации : Phys. Met. Metallogr. - 2022. - Vol. 123, Is. 7. - P.715-720. - ISSN 0031918X (ISSN), DOI 10.1134/S0031918X22070146
Примечания : Cited References: 17. - The studies were performed in terms of a state assignment of the Ministry of Science and Higher Education of the Russian Federation, no. FEUZ-2020-0051
Аннотация: Magnetic properties and peculiarities of the domain structure of multilayer [Ti/FeNi]х/Cu/[FeNi/Ti]x elements, the geometry of which ensures the high magnetoimpedance effect, are studied by varying the number of layers in the range x = 0–5. Peculiarities of the magnetization processes of the multilayer structures, which are magnetized at both substrate and free surfaces, are analyzed. It has been found that elements in which the magnetization reversal from the free side occurs by rotation of the magnetization vector have a higher magnetoimpedance effect compared to elements in which the magnetization reversal occurs with the formation of 180° domain walls both in the layer from the side of the substrate and the free layer as well.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Melnikov, Grigory Yu., Vazhenina I. G., Iskhakov R. S., Boev N. M., Komogortsev S. V., Svalov, Andrey V., Kurlyandskaya, Galina V.
Заглавие : Magnetic properties of FeNi/Cu-based lithographic rectangular multilayered elements for magnetoimpedance applications
Место публикации : Sensors. - 2023. - Vol. 23, Is. 13. - Ст.6165. - ISSN 14248220 (eISSN), DOI 10.3390/s23136165
Примечания : Cited References: 72. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/project/22-29-00980/ (accessed on 1 July 2023)Authors acknowledge the possibility to use the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” for ferromagnetic resonance studies. We thank A.A. Yuvchenko and V.N. Lepalovskij for special support. The authors wish to thank the anonymous referees for their comments and suggestions
Аннотация: The rectangular elements in magnetoimpedance (MI) configuration with a specific nanocomposite laminated structure based on FeNi and Cu layers were prepared by lift-off lithographic process. The properties of such elements are controlled by their shape, the anisotropy induced during the deposition, and by effects associated with the composite structure. The characterizations of static and dynamic properties, including MI measurements, show that these elements are promising for sensor applications. We have shown that competition between the shape anisotropy and the in-plane induced anisotropy of the element material is worth taking into account in order to understand the magnetic behavior of multilayered rectangular stripes. A possibility of the dynamic methods (ferromagnetic and spin-wave resonance) to describe laminated planar elements having a non-periodic modulation of both structure and magnetic parameters of a system is demonstrated. We show that the multilayered structure, which was originally designed to prevent the development of a “transcritical” state in magnetic layers and to reach the required thickness, also induces the effects that hinder the achievement of the goal, namely an increase in the perpendicular magnetic anisotropy energy.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Boev N. M., Izotov A. V., Skomorokhov G. V., Solovev P. N.
Заглавие : Magnetic properties of permalloy thin film edges
Коллективы : Ministry of Science and Higher Education of the Russian Federation [02, G25.31.0313]
Место публикации : Russ. Phys. J. - 2020. - Vol. 63, Is. 1. - P.16-22. - ISSN 1064-8887, DOI 10.1007/s11182-020-01997-6. - ISSN 1573-9228(eISSN)
Примечания : Cited References: 23. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation (Project No. 02.G25.31.0313).
Предметные рубрики: ANISOTROPIES
Аннотация: The paper presents the results of ferromagnetic resonance (FMR) spectrometry of magnetic properties of nanocrystalline thin films obtained by magnetron sputtering of permalloy targets of various composition (NixFe1-x, x = 0.6-0.85). The behavior of the main magnetic properties of the thin film edges is analyzed. Near the film edges, not only the fluctuation of the uniaxial magnetic anisotropy field is observed, but also a drastic widening of the FMR line and the decrease in the effective saturation magnetization.
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