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    Игнатченко, Вальтер Алексеевич.
    Асимметрия пиков функции грина в ферромагнетиках с двумерными неоднородностями / В. А. Игнатченко, Д. С. Цикалов, Д. С. Полухин // Новое в магнетизме и магнитных материалах : сборник трудов XXIV международной конференции / прогр. ком.: Р. С. Исхаков, С. Г. Овчинников [и др.]. - 2021. - Секция 5: Элементарные возбуждения. - Ст. 5-52-55. - Библиогр.: 5. - Исследование выполнено при финансовой поддержке РФФИ, Правительства Красноярского края и Красноярского краевого фонда науки в рамках научного проекта № 20-42-240010.
   Перевод заглавия: Asymmetry of green function peaks in ferromagnets with two-dimensional inhomogeneities
Кл.слова (ненормированные):
функции Грина -- неоднородности -- динамическая восприимчивость -- спиновые волны -- самосогласованное приближение -- магнитные пленки
Аннотация: Влияние двумерных неоднородностей на динамическую восприимчивость (функцию Грина) ферромагнетиков рассмотрено. Исследование проведено численно с учетом процессов многократного рассеивания волн на случайных неоднородностях в рамках самосогласованного приближения. Показано, что пики функций Грина под действием двумерных неоднородностей принимают асимметричную форму. Низкочастотные края пиков имеют более крутой спад, а высокочастотные края имеют более пологий спад, с хвостами, вытянутыми в высокочастотную область. С ростом корреляционного волнового числа двумерных неоднородностей ширины пиков уменьшаются, асимметрия формы пиков увеличивается, достигает максимума и затем уменьшается
Effects of two-dimensional inhomogeneities on the dynamic susceptibility (Green function) of ferromagnets have been considered. The study was carried out numerically, taking into account the processes of multiple scattering of waves by random inhomogeneities in the framework of the self-consistent approximation. It has been shown that the peaks of the Green functions under the action of two-dimensional inhomogeneities took on an asymmetric shape. The low-frequency edges of the peaks have a steeper roll-off, and the high-frequency edges have a gentler roll-off, with tails stretched into the high-frequency region. With an increase in the correlation wave number of twodimensional inhomogeneities, the widths of the peaks decrease, the asymmetry of the peak shapes increases, reaches a maximum, and then decreases.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Исхаков, Рауф Садыкович \прогр. ком.\; Iskhakov, R. S.; Овчинников, Сергей Геннадьевич \прогр. ком.\; Ovchinnikov, S. G.; Цикалов, Денис Сергеевич; Tsikalov, D. S.; Полухин, Дмитрий Сергеевич; Polukhin, D. S.; Ignatchenko, V. A.; "Новое в магнетизме и магнитных материалах", международная конференция(24 ; 2021 ; 1-8 июля ; Москва); Научный совет по физике конденсированных сред РАН; МИРЭА - Российский технологический университет; Московский государственный университет им. М.В. Ломоносова; Магнитное общество России
}
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Vazhenina, I. G.
Spin-Wave Resonance Detection of Nanostructured Magnetic Alloy Inhomogeneities, Using the Example of Co–P and Co–Ni Planar Systems / I. G. Vazhenina, L. A. Chekanova, R. S. Iskhakov // Bull. Russ. Acad. Sci. Phys. - 2019. - Vol. 83, Is. 6. - P. 713-715, DOI 10.3103/S1062873819060364. - Cited References: 12. - The reported study was funded by the Russian Foundation for Basic Research, the Government of Krasnoyarsk Krai, and the Krasnoyarsk Regional Fund of Science as part of research project no. 18-42-243005 “Synthesis and Investigation of Magnetic Properties of Gradient Materials Characterized by a Predetermined Type of the Magnetic Parameter Change.” . - ISSN 1062-8738
Кл.слова (ненормированные):
Magnetic materials -- Magnetic thin films -- Multilayers -- Nanocrystals -- Nickel alloys -- Resonance -- Spin waves -- Thickness measurement
Аннотация: Inhomogeneous layered magnetic thin films of amorphous and nanocrystalline Со–Р and Co–Ni alloys are studied via spin-wave resonance. It is found that the formation of a magnetic potential profile specified over the coating thickness leads to characteristic modifications of the spin-wave resonance spectrum. Another important factor that determines the type of modification is the dominant magnetic parameter (the constant of magnetization or exchange coupling).

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Публикация на русском языке Важенина, Ирина Георгиевна. Неоднородности в магнитных наноструктурных сплавах, выявляемые методом спин-волнового резонанса, на примере планарных систем Co–P и Co–Ni [Текст] / И. Г. Важенина, Л. А. Чеканова, Р. С. Исхаков // Изв. РАН. Сер. физич. - 2019. - Т. 83 № 6. - С. 786–788

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Chekanova, L. A.; Чеканова, Лидия Александровна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Важенина, Ирина Георгиевна
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The spin-wave resonance study of concentrational inhomogeneities in nanocrystalline Ni-Fe-P and Ni-Fe-C alloys / R. S. Iskhakov [et al.] // Tech. Phys. Lett. - 2001. - Vol. 27, Is. 4. - P. 344-347, DOI 10.1134/1.1370222. - Cited References: 16 . - ISSN 1063-7850

РУБ Physics, Applied
Рубрики:
PULSED PLASMA VAPORIZATION
FILMS
PRESSURE
Аннотация: The films of nanocrystalline Fe-Ni alloys obtained by various methods in the permalloy composition range (similar to 20 at. % Fe) were studied by the method of spin-wave resonance (SWR) spectroscopy. The effective SW exchange stiffness eta (eff) exhibits a characteristic dependence on the spin wavelength, which is indicative of the magnetization fluctuations in these films with a correlation radius of 12-20 nm. This is indirect evidence of the microphase separation in these nanocrystalline alloys and provides an estimate of the characteristic spatial size of an inhomogeneity in the atomic ratio X-Fe/X-Ni . (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, KIrenskii Inst Phys, Siberian Div, Krasnoyarsk, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Prokof'ev, D. E.; Chekanova, L. A.; Чеканова, Лидия Александровна; Zhigalov, V. S.; Жигалов, Виктор Степанович
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Spin-wave resonance in three-layer NiFe/DyxCo1-x/NiFe films as a method for detecting structural inhomogeneities in amorphous DyxCo1-x layers / R. S. Iskhakov [et al.] // JETP Letters. - 2002. - Vol. 76, Is. 11. - P. 656-659, DOI 10.1134/1.1545578. - Cited References: 8 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
ALLOYS
Аннотация: The standing spin-wave spectrum was studied by spin-wave resonance in three-layer Ni80Fe20/DyxCo1 - x/Ni80Fe20 films with an amorphous interlayer of DyCo alloy in the region of compensation compositions. It is shown that the spin-wave resonance (SWR) spectrum in the geometry k parallel to M is observed only for a planar system with a DyCo layer of precompensation composition. In the k perpendicular to M geometry, the SWR spectrum was observed for the DyCo systems with both pre- and postcompensation compositions. The exchange stiffness was analyzed as a function of the DyCo layer thickness to formulate a model of microheterophase structure for amorphous DyCo alloys in the compensation region, where the magnetic microstructure accounts for the dynamic and static magnetic characteristics of these materials. (C) 2002 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Seredkin, V. A.; Середкин, Виталий Александрович; Stolyar, S. V.; Столяр, Сергей Викторович; Chekanova, L. A.; Чеканова, Лидия Александровна; Yakovchuk, V. Y.
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Spin-Wave Resonance in One-Dimensional Magnonic Crystals by an Example of Multilayer Co-P Films / R. S. Iskhakov, S. V. Stolyar, L. A. Chekanova, I. G. Vazhenina // Phys. Solid State. - 2020. - Vol. 62, Is. 10. - P. 1861-1867, DOI 10.1134/S1063783420100121. - Cited References: 47 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
FERROMAGNETIC-RESONANCE
   SPECTRUM
   MODES
   INHOMOGENEITIES
Кл.слова (ненормированные):
spin-wave resonance -- surface-anisotropy constant -- exchange-interaction constant -- amorphous and nanocrystalline alloys
Аннотация: Layered magnetic films of Co–P alloy, which are sets of laminates with certain atomic and chemical structures, have been investigated by spin-wave resonance. Coatings of two types were synthesized: a magnonic crystal (amorphous Co(P)/fcc Co(P))N and gradient Co(P) films. They exhibit two different modifications of the spin-wave resonance (SWR) spectrum. In the first case, the SWR spectrum is described as Hn(n) ~ n2 with a modification caused by the formation of the first stop band of the magnonic crystal. In the second case, the dependence of resonance fields Hn of the spin-wave modes on mode number n has the form of Hn(n) ~ n2/3. Thermal annealing leads to crystallization (amorphous alloy → fcc) and causes transformation of the layered films to the films of single-phase Co–P alloys, which is accompanied by a change in the shapes of the SWR spectra and occurrence of a “exchange kink” spectral modification.

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Публикация на русском языке Спин-волновой резонанс в одномерных магнонных кристаллах, на примере мультислойных пленок Co-P [Текст] / Р. С. Исхаков, С. В. Столяр, Л. А. Чеканова, И. Г. Важенина // Физ. тверд. тела. - 2020. - Т. 62 Вып. 10. - С. 1658-1664

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Stolyar, S. V.; Chekanova, L. A.; Чеканова, Лидия Александровна; Vazhenina, I. G.; Важенина, Ирина Георгиевна
}
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Spin waves in ferromagnets with periodic and random inhomogeneities [Text] / V. A. Ignatchenko // International Conference Functional Materials (ICFM-2011) : Book of abstracts : [3-8 Oct. 2011, Crimea, Ukraine]. - 2011. - P15

Доп.точки доступа:
Ignatchenko, V.A.; International Conference Functional Materials(6 ; 2011 ; Oct. ; Crimea, Ukraine)
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Spectral properties of superlattices with anisotropic inhomogeneities. The transition from 3D to 2D disorder / V. A. Ignatchenko, A. V. Pozdnyakov // Moscow Int. Symp. on Magnet. (MISM-2011) : Book of abstracts. - 2011. - Ст. 24PO-M-21. - P. 800

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Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Pozdnyakov, A. V.; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
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Spectral properties of superlattices with anisotropic correlated inhomogeneities [Text] / V. A. Ignatchenko, A. V. Pozdnyakov // IV Euro-Asian Symposium "Trends in MAGnetism" Nanospintronics (EASTMAG-2010). School for young scientist "Spintronics" : June 28 - Lule 2, 2010"Book of abstracts. - Ekaterinburg, 2010. - P. 323

РИНЦ

Доп.точки доступа:
Ignatchenko, V.A.; Pozdnyakov, A.V.; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg)Уральское отделение РАН
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Mankov, Y. I.
High-frequency susceptibility of a multilayered ferromagnetic system with two-dimensional inhomogeneities / Y. I. Mankov, D. S. Tsikalov // Phys. Solid State. - 2010. - Vol. 52, Is. 3. - P. 544-553, DOI 10.1134/S1063783410030157. - Cited References: 24. - This study was supported in part by the Council on Grants from the President of the Russian Federation for the State Support of Scientific Investigations performed by the Leading Scientific Schools (grant no. 3818.2008.3), the Presidium of the Russian Academy of Sciences (Program no. 27.1), and the Ministry of Education and Science within the framework of the Federal Program (State Contract no. 2.740.11.0220). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SPIN-WAVE SUSCEPTIBILITY
   SPECTRUM
   SUPERLATTICES
   INTERFACES
Аннотация: This paper reports on the results of the investigation of the high-frequency susceptibility of a layered ferromagnetic structure in which, apart from a periodic change in the magnetic anisotropy parameter from layer to layer, this parameter varies along layers according to a random law (the superlattice with two-dimensional phase inhomogeneities). The evolution of the frequency dependence of the imaginary part of the averaged Green's function in the range of the energy gap (band gap) in the spectrum of waves propagating along the superlattice axis due to the change in the relative root-mean-square fluctuations of the phase gamma 2 has been studied at the boundaries of the odd Brillouin zones. It has been found that, for all odd Brillouin zones, the imaginary part of the Green's function exhibits a universal behavior: the peak corresponding to the edge of the band gap with a lower frequency remains unchanged, and the peak corresponding to the edge of the band gap with a higher frequency is smoothed with an increase in the quantity gamma(2). These effects, which were initially revealed at the boundary of the first Brillouin zone of the sinusoidal superlattice, have been explained, as before, by the specific features of the energy conservation laws for the incident and scattered waves in the lattice with two-dimensional inhomogeneities. It has been demonstrated that an increase in the Brillouin zone number leads to a decrease in the value of gamma(2) at which the peak at the edge of the band gap with a higher frequency disappears.

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Держатели документа:
[Mankov, Yu. I.
Tsikalov, D. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Mankov, Yu. I.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobodny 79, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич
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10.

    Magnetoelastic Resonance in Zero-Mean Magnetostrictive Media / V. A. Ignatchenko, D. S. Polukhin // TRENDS IN MAGNETISM / . - STAFA-ZURICH : TRANS TECH PUBLICATIONS LTD, 2011. - Vol. 168-169. - P. 101-104. - (Solid State Phenomena), DOI 10.4028/www.scientific.net/SSP.168-169.101. - Cited Reference Count: 7 . - ISBN 1012-0394
Рубрики:
Materials Science, Multidisciplinary
   Physics, Condensed Matter
Кл.слова (ненормированные):
spin waves -- elastic waves -- magnetoelastic coupling -- inhomogeneities -- self-consistent approximation -- dynamic susceptibility
Аннотация: The interaction between two wave fields of different nature that are caused by rms fluctuations of the coupling parameter between these fields in media with zero-mean coupling parameter is. considered. Taking into consideration the multiple scattering processes of waves on the inhomogeneities leads to the results considerably different from those that have been obtained for the same situation in the Bourret approximation earlier [4,5]. Instead of the degeneration removal of frequencies in the wave spectrum and the appearance of two resonance peaks in the dynamic susceptibility at the intersection of the initial dispersion laws, the sharp broadening of the self-mode peak has to be observed. The consideration is done by the example of magnetoelastic waves in zero-mean magnetostrictive media.

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Держатели документа:
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); Russian Acad Sci, Inst Metal Phys
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