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Inspection probes of a ferromagnetic resonance scanning spectrometer / B. A. Belyaev, N. M. Boev, A. A. Gorchakovsky, R. G. Galeev // Instrum. Exp. Tech. - 2021. - Vol. 64, Is. 2. - P. 277-284, DOI 10.1134/S0020441221010218. - 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) . - ISSN 0020-4412
Кл.слова (ненормированные):
Electromagnetic waves -- Ferromagnetic materials -- Ferromagnetism -- Iron alloys -- Nickel alloys -- Probes -- Q factor measurement -- Signal to noise ratio -- Spectrometers -- Frequency ranges -- High Q factor -- Hole diameter -- Local areas -- Permalloy films -- Scanning spectrometer -- Thin magnetic films -- Ferromagnetic resonance
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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Публикация на русском языке Измерительные головки сканирующего спектрометра ферромагнитного резонанса [Текст] / Б. А. Беляев, Н. М. Боев, A. A. Горчаковский, Р. Г. Галеев // Приборы и техн. эксперим. - 2021. - № 2. - С. 107-114

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660074, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation
AO NPP Radiosvyaz, Krasnoyarsk, 660021, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Gorchakovsky, A. A.; Горчаковский, Александр Антонович; Galeev, R. G.
}
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Second harmonic generation in thin permalloy film / P. N. Solovev, A. O. Afonin, B. A. Belyaev [et al.] // J. Phys. D. - 2021. - Vol. 54, Is. 42. - Ст. 425002, DOI 10.1088/1361-6463/ac1762. - Cited References: 43. - This work was supported by the Russian Science Foundation under Grant No. 19-72-10047. The equipment of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center 'Krasnoyarsk Science Center SB RAS' was used during the measurement . - ISSN 0022-3727. - ISSN 1361-6463

РУБ Physics, Applied
Рубрики:
FERROMAGNETIC-RESONANCE
   MAGNETIZATION DYNAMICS
   HARMONIC-GENERATION
   FERRITES
Кл.слова (ненормированные):
ferromagnetic resonance -- frequency doubling -- nonlinear dynamics -- thin magnetic film -- second harmonic
Аннотация: Second harmonic generation versus strength and direction of the applied static magnetic field was measured for a thin permalloy (Ni80Fe20) film in a microstrip line at a driving frequency of 1 GHz and maximum input power of ~110 mW. The measurements revealed two peaks in the double frequency signal—in the low static field (~10 Oe) and the high one (~45 Oe). To explain these findings, a macrospin model of a thin magnetic film with in-plane uniaxial magnetic anisotropy was considered. A perturbation expansion of the Landau–Lifshitz–Gilbert equation provided an explanation of the experimental data. The analysis of the model revealed that the low-field peak was caused by the longitudinal second-order magnetization component and the high-field peak by the transversal one. It was also shown that the uniaxial magnetic anisotropy of the film and the dependence of the magnetic damping parameter on the applied field play an important role in the process of the second harmonic generation. The results obtained give insights into some peculiarities of the nonlinear magnetization dynamics that are important in the development of magnetic film-based devices in the field of microwave signal processing and manipulation.

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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 660041, Russia.

Доп.точки доступа:
Solovev, P. N.; Соловьев, Платон Николаевич; Afonin, A. O.; Афонин, Алексей Олегович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Govorun, I. V.; Говорун, Илья Валерьевич; Izotov, A. V.; Изотов, Андрей Викторович; Ugryumov, A. V.; Угрюмов, Андрей Витальевич; Leksikov, An. A.; Лексиков, Андрей Александрович; Russian Science FoundationRussian Science Foundation (RSF) [19-72-10047]
}
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Domain structure and magnetization reversal in multilayer structures consisting of thin permalloy films separated with nonmagnetic interlayers / B. A. Belyaev, N. M. Boev, A. V. Izotov, P. N. Solovev // Russ. Phys. J. - 2021. - Vol. 64, Is. 6. - P. 1160-1167, DOI 10.1007/s11182-021-02436-w. - 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 . - ISSN 1064-8887. - ISSN 1573-9228

РУБ Physics, Multidisciplinary
Рубрики:
MICROMAGNETIC CALCULATION
   MAGNETOMETER
   SIMULATION
   NOISE
Кл.слова (ненормированные):
micromagnetic modeling -- multilayer magnetic film -- domain structure -- hysteresis loop -- microstrip resonator -- magnetic field sensor
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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Публикация на русском языке Доменная структура и процессы перемагничивания многослойных систем из тонких пленок пермаллоя с немагнитными прослойками [Текст] / Б. А. Беляев, Н. М. Боев, А. В. Изотов, П. Н. Соловьев // Изв. вузов. Физика. - 2021. - Т. 64 № 6. - С. 170-176

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

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
}
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Non-standing spin-waves in confined micrometer-sized ferromagnetic structures under uniform excitation / S. Pile, T. Feggeler, T. Schaffers [et al.] // Appl. Phys. Lett. - 2020. - Vol. 116, Is. 7. - Ст. 072401, DOI 10.1063/1.5139881. - Cited References: 37. - The use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. The authors would like to thank the Austrian Science Foundation (FWF), Project No. I-3050 as well as the German Research Foundation (DFG), Project No. OL513/1-1 for financial support. K.O., H.W., B.Z and M.F. acknowledge additional funding from Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project-ID 405553726 – TRR 270 and B.Z and M.F. acknowledge additional funding from Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation . - ISSN 0003-6951
Кл.слова (ненормированные):
Ferromagnetic materials -- Ferromagnetic resonance -- Ferromagnetism -- Iron alloys -- Magnetic logic devices -- Micrometers -- Nickel alloys -- Permalloy
Аннотация: A non-standing characteristic of directly imaged spin-waves in confined micrometer-sized ultrathin Permalloy (Ni80Fe20) structures is reported along with evidence of the possibility to alter the observed state by modifications to the sample geometry. Using micromagnetic simulations, the presence of the spin-wave modes excited in the Permalloy stripes along with the quasi-uniform modes was observed. The predicted spin-waves were imaged in direct space using time resolved scanning transmission X-ray microscopy, combined with a ferromagnetic resonance excitation scheme (STXM-FMR). STXM-FMR measurements revealed a non-standing characteristic of the spin-waves. Also, it was shown by micromagnetic simulations and confirmed using STXM-FMR results that the observed characteristic of the spin-waves can be influenced by the local magnetic fields in different sample geometries.

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Держатели документа:
Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, 4040, Austria
Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Duisburg, 47057, Germany
Ernst Ruska-Centrum fur Mikroskopie und Spektroskopie Mit Elektronen, Forschungszentrum Julich GmbH, Julich, D-52425, Germany
Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Stanford Synchrotron Radiation Laboratory, Slac National Accelerator Laboratory, Menlo Park, CA 94025, United States
Department of Physics, University of California Santa Cruz, Santa Cruz, CA 95064, United States
Department of Applied Physics, Aalto University School of Science, NanoSpin, P.O. Box 15100, Aalto, FI-00076, Finland
Lawrence Berkeley National Laboratory, Advanced Light Source, Berkeley, CA 94720, United States
Department of Material Sciences and Engineering, Stanford University, Stanford, CA 94305, United States

Доп.точки доступа:
Pile, S.; Feggeler, T.; Schaffers, T.; Meckenstock, R.; Buchner, M.; Spoddig, D.; Zingsem, B.; Ney, V.; Farle, M.; Фарле, Михаель; Wende, H.; Ohldag, H.; Ney, A.; Ollefs, K.
}
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Magnetic properties of permalloy thin film edges / B. A. Belyaev, N. M. Boev, A. V. Izotov [et al.] // Russ. Phys. J. - 2020. - Vol. 63, Is. 1. - P. 16-22, DOI 10.1007/s11182-020-01997-6. - 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). . - ISSN 1064-8887. - ISSN 1573-9228
Рубрики:
ANISOTROPIES
Кл.слова (ненормированные):
magnetic thin film -- ferromagnetic resonance -- edge effects -- magnetic anisotropy
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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Публикация на русском языке Особенности поведения магнитных характеристик вблизи краев тонких пермаллоевых пленок [Текст] / Б. А. Беляев, Н. М. Боев, А. В. Изотов [и др.] // Изв. вузов. Физика. - 2020. - Т. 63 № 1. - С. 17-23

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

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Skomorokhov, G. V.; Скоморохов, Георгий Витальевич; Solovev, P. N.; Соловьев, Платон Николаевич; Ministry of Science and Higher Education of the Russian Federation [02, G25.31.0313]
}
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    Micromagnetic simulation of domain structure in thin permalloy films with in-plane and perpendicular anisotropy / P. N. Solovev, A. V. Izotov, B. A. Belyaev, N. M. Boev // Physica B. - 2020. - Vol. 604. - Ст. 412699, DOI 10.1016/j.physb.2020.412699. - Cited References: 31. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation , agreement number 075-11-2019-054 dated 22.11.2019 . - ISSN 0921-4526
   Перевод заглавия: Микромагнитное моделирование доменной структуры тонких пермаллоевых пленок с одноосной планарной и перпендикулярной анизотропией
Кл.слова (ненормированные):
Micromagnetic simulation -- Thin magnetic film -- Magnetic anisotropy -- Stripe domains -- Hysteresis loop -- Saturation field
Аннотация: We investigate the domain structure formation and magnetization processes in thin permalloy films with in-plane and perpendicular magnetic anisotropy by using micromagnetic simulation. We show that the films of thicknesses less than a critical value Lcr are in the monodomain state, and their magnetization processes are specified by the in-plane anisotropy. Above the critical thickness Lcr, the perpendicular anisotropy dominates, leading to the formation of the stripe domain structure that significantly complicates the magnetization reversal. The values of the critical thickness, parameters of the domain structure, and the saturation field obtained from the micromagnetic simulations are compared with the corresponding values calculated using analytical expressions derived by Murayama in the framework of the domain structures theory.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Solovev, P. N.; Соловьев, Платон Николаевич; Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович
}
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Magnetic properties and peculiarities of the domain structure of multilayer permalloy-based GMI elements / A. A. Pasynkova, V. N. Lepalovskii, A. V. Svalov [et al.] // Phys. Met. Metallogr. - 2022. - Vol. 123, Is. 7. - P. 715-720, DOI 10.1134/S0031918X22070146. - 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 . - ISSN 0031-918X
Кл.слова (ненормированные):
magnetic properties -- magnetic domain structure -- magnetic impedance -- permalloy-based film elements
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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Публикация на русском языке Магнитные свойства и особенности доменной структуры многослойных ГМИ-элементов на основе пермаллоя [Текст] / А. А. Пасынкова, В. Н. Лепаловский, А. В. Свалов [и др.] // Физ. металлов и металловед. - 2022. - Т. 123 № 7. - С. 682-686

Держатели документа:
Ural Federal University, Ekaterinburg, 620002, Russian Federation
Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, 620108, Russian Federation
Institute of Physics, Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Universidad del Pais Vasco UPV/EHU, Leioa, 48940, Spain

Доп.точки доступа:
Pasynkova, A. A.; Lepalovskii, V. N.; Svalov, A. V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Kurlyandskaya, G. V.
}
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Structural and magnetic properties of FeNi films and FeNi-based trilayers with out-of-plane magnetization component / A. V. Svalov, A. N. Gorkovenko, A. Larranaga [et al.] // Sensors. - 2022. - Vol. 22, Is. 21. - Ст. 8357, DOI 10.3390/s22218357. - Cited References: 50. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/en/project/22-29-00980/ and in part by the Research Groups of the UPV-EHU . - ISSN 1424-8220
Кл.слова (ненормированные):
magnetic field sensors -- permalloy -- crystal structure -- perpendicular magnetic anisotropy -- stripe domains -- “transcritical” state -- columnar microstructure
Аннотация: FeNi films of different thickness and FeNi/(Fe, Co)/FeNi trilayers were prepared by magnetron sputtering deposition onto glass substrates. The permalloy films had a columnar microstructure. The detailed analysis of the magnetic properties based on the magnetic and magneto-optical measurements showed that at thicknesses exceeding a certain critical thickness, hysteresis loops acquire a specific shape and the coercive force of the films increase sharply. The possibility of the estimation of the perpendicular magnetic anisotropy constant using the Murayama equation for the thickness dependence of saturation field was demonstrated. The results of studies of the structural and magnetic properties of FeNi films laminated by Fe and Co spacers with different thickness are presented.

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Держатели документа:
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Advanced Research Facilities (SGIKER), Universidad del Pais Vasco UPV-EHU, Bilbao, 48080, Spain
Kirensky Institute of Physics FRS KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Departamento de Electricidad y Electronica, Universidad del Pais Vasco UPV/EHU, Bilbao, 48080, Spain

Доп.точки доступа:
Svalov, A. V.; Gorkovenko, A. N.; Larranaga, A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Kurlyandskaya, G. V.
}
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Magnetic properties of FeNi/Cu-based lithographic rectangular multilayered elements for magnetoimpedance applications / G. Yu. Melnikov, I. G. Vazhenina, R. S. Iskhakov [et al.] // Sensors. - 2023. - Vol. 23, Is. 13. - Ст. 6165, DOI 10.3390/s23136165. - 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 . - ISSN 1424-8220
Кл.слова (ненормированные):
magnetic multilayers -- permalloy -- magnetic properties -- ferromagnetic resonance -- spin-wave resonance -- magnetoimpedance -- magnetic field sensors
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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Держатели документа:
Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Ekaterinburg, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
School of Space and Information Technology, Siberian Federal University, 660041 Krasnoyarsk, Russia
Applied Physics Department, Reshetnev Siberian State University of Science and Technology, 660037 Krasnoyarsk, Russia

Доп.точки доступа:
Melnikov, Grigory Yu.; Vazhenina, I. G.; Важенина, Ирина Георгиевна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Boev, N. M.; Боев, Никита Михайлович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Svalov, Andrey V.; Kurlyandskaya, Galina V.
}
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10.

Tailoring the microwave properties of thin permalloy films using a periodically grooved substrate / A. V. Izotov, B. A. Belyaev, N. M. Boev [et al.] // Physica B. - 2022. - Vol. 629. - Ст. 413654, DOI 10.1016/j.physb.2021.413654. - Cited References: 50. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation, agreement number 075-11-2019054 dated November 22, 2019 . - ISSN 0921-4526. - ISSN 1873-2135

РУБ Physics, Condensed Matter
Рубрики:
FERROMAGNETIC-RESONANCE
   MAGNETIC-PROPERTIES
   ANISOTROPY
   FREQUENCY
Кл.слова (ненормированные):
Patterned film -- Topography-induced anisotropy -- Netzelmann approach -- Ferromagnetic resonance -- Damping parameter
Аннотация: Thin magnetic films with periodic surface topography are of special interest for microwave applications as their static and dynamic magnetic characteristics can be readily adjusted. In this paper, we explore the capabilities of a simple method for producing large-area periodically patterned films by creating regularly spaced grooves on a substrate using a diamond cutter. For 110-nm-thick films, it was found that the substrate-topography-induced magnetic anisotropy was inversely proportional to the pattern period, which in experimental samples varied from 5 to 20 mu m. Based on the Netzelmann theory, analytical expressions for demagnetization tensor components were obtained, which accord well with the experimental data. The measurements of the natural ferromagnetic resonance spectra demonstrated that the increase of the topography-induced magnetic anisotropy with the decrease of the pattern period led to the increase of the resonance frequency from 0.65 to 1.86 GHz, and to a decrease of the linewidth and effective damping parameter.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Burmitskikh, A. V.; Бурмитских, Антон Владимирович; Leksikov, An. A.; Лексиков, Андрей Александрович; Skomorokhov, G. V.; Скоморохов, Георгий Витальевич; Solovev, P. N.; Соловьев, Платон Николаевич; Ministry of Science and Higher Education of the Russian Federation [075-11-2019054]
}
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