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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Babitskii A. N., Belyaev B. A., Boev N. M., Skomorokhov G. V., Izotov A. V., Galeev R. G.
Заглавие : A magnetometer of weak quasi-stationary and high-frequency fields on resonator microstrip transducers with thin magnetic fields
Место публикации : Instrum. Exp. Tech.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 59, Is. 3. - P.425-432. - ISSN 00204412 (ISSN), DOI 10.1134/S0020441216030131
Примечания : Cited References: 23. - This study was performed within the framework of the State Job of the Ministry of Education and Science of the Russian Federation for the research at the Siberian Federal University in 2014 (project no. 3.528.2014K).
Предметные рубрики: Ferromagnetic-resonance
Films
Susceptibility
Anisotropy
Sensors
Trends
Аннотация: A high-sensitivity magnetometer for simultaneous measurements of three components of a weak quasi-stationary or high-frequency magnetic-field vector was developed and investigated. Microstrip structures that are based on irregular resonators serve as the magnetometer transducers. An anisotropic thin-film magnetic structure is used as the sensing element. This structure consists of two thin magnetic films that are prepared by magnetron sputtering of a Ni75Fe25 permalloy target and separated by a silicon monoxide layer. It is demonstrated that the transducer exhibits the maximum sensitivity, when the easy magnetization axis of the film structure is orthogonal to the polarization direction of the pumping microwave magnetic field in the microstrip resonator and at an optimal value of a constant magnetic bias field and its optimal deflection from the pumping-field polarization direction which is parallel to it. The magnetometer is characterized by a wide dynamic range of measured magnetic fields, 10–10–10–4 Т, and a wide frequency range, 10–1–105 Hz. © 2016, Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Izotov A.V., Belyaev B. A.
Заглавие : A METHOD FOR COMPUTING THE MICROWAVE ABSORPTION SPECTRUM IN A DISCRETE MODEL OF A FERROMAGNETIC
Место публикации : Russ. Phys. J. - NEW YORK: SPRINGER, 2011. - Vol. 53, Is. 9. - С. 900-905. - FEB. - ISSN 1064-8887, DOI 10.1007/s11182-011-9508-4
Примечания : Cited Reference Count: 8. - Гранты: The work was supported in part by the Federal Purpose-Oriented Program "Scientific and Scientific-Pedagogical Staff of the Innovative Russia" for the years 2009-2013, RAS Presidium Project No. 27, and by the State Contract No. 02.740.11.0568.Финансирующая организация: Federal Purpose-Oriented Program; RAS Presidium [27]; State Contract [02.740.11.0568]
Предметные рубрики:
Ключевые слова (''Своб.индексиров.''): magnetization oscillation--landau-lifshitz equation--absorption spectrum--absorption spectrum--landau-lifshitz equation--magnetization oscillation
Аннотация: An effective method based on linearization of the Landau-Lifshitz equation has been developed to determine normal magnetization oscillation modes in a discrete model of a condensed medium. The possibility to calculate microwave absorption spectra for ferromagnetic specimens of any shape is shown.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Vazhenina I. G., Kleshnina S. A., Iskhakov R. S., Lepalovskij V. N., Pasynkova A. A., Svalov A. V.
Заглавие : Advanced characterization of FeNi-based films for the development of magnetic field sensors with tailored functional parameters
Место публикации : Sensors. - 2022. - Vol. 22, Is. 9. - Ст.3324. - ISSN 14248220 (ISSN), DOI 10.3390/s22093324
Примечания : Cited References: 35. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/en/project/22-29-00980/ (accessed on 20 March 2022)
Аннотация: Magnetometry and ferromagnetic resonance are used to quantitatively study magnetic anisotropy with an easy axis both in the film plane and perpendicular to it. In the study of single-layer and multilayer permalloy films, it is demonstrated that these methods make it possible not only to investigate the average field of perpendicular and in-plane anisotropy, but also to characterize their inhomogeneity. It is shown that the quantitative data from direct integral and local measurements of magnetic anisotropy are consistent with the direct and indirect estimates based on processing of the magnetization curves. The possibility of estimating the perpendicular magnetic anisotropy constant from the width of stripe domains in a film in the transcritical state is demonstrated. The average in-plane magnetic anisotropy field of permalloy films prepared by magnetron sputtering onto a Corning glass is almost unchanged with the thickness of a single-layer film. The inhomogeneity of the perpendicular anisotropy field for a 500 nm film is greater than that for a 100 nm film, and for a multilayer film with a total permalloy thickness of 500 nm, it is greater than that for a homogeneous film of the same thickness.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aksenov A. E., Fedorov Y. M., Leksikov Al. A.
Заглавие : Peculiarities of photo-luminescence of anti-ferromagnetic KMNF3
Место публикации : Fiz. Nizk. Temp. - 1982. - Vol. 8, Is. 3. - P.320-323. - ISSN 0132-6414
Примечания : Cited References: 8
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Li O. A., Nikolaeva E. D., Vorotynov A. M., Velikanov D. A., Knyazev Yu. V., Bayukov O. A., Iskhakov R. S., P’yankov V. F., Volochaev M. N.
Заглавие : An effective method of magnetic hyperthermia based on the ferromagnetic resonance phenomenon
Место публикации : Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 2. - P.174-180. - ISSN 0031918X (ISSN), DOI 10.1134/S0031918X22601834. - ISSN 15556190 (eISSN)
Примечания : Cited References: 15. - This study was supported by grant no. 22-14-20020 from the Russian Science Foundation and the Krasnoyarsk Regional Fund for Support of Scientific and Technological Activities. The authors are grateful to the Krasnoyarsk Regional Center for Collective Use at Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, for providing their research facilities
Аннотация: Nickel and cobalt ferrite nanoparticles have been synthesized using the chemical precipitation method; the nanoparticle sizes were found to be 63 ± 22 and 26 ± 4 nm, respectively. The static hysteresis loops and Mossbauer spectra have been measured. It is shown that cobalt ferrite powders are magnetically harder than nickel ferrite powders. Ferromagnetic resonance (FMR) curves have been studied. It is found that the FMR absorption for cobalt ferrite is observed at room temperature and above. The time dependences of the nanoparticle warm-up under FMR conditions have been measured. The maximum temperature changes for nickel ferrite and cobalt ferrite particles are 8 and 11 K, respectively. Using the example of cobalt ferrite powder, the possibility of effectively heating of particles in the FMR mode in their own field without using a DC magnetic field source is shown. The observed effect can be used in magnetic hyperthermia.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuz'menko A. M., Mukhin A. A., Ivanov V. Y., Kadomtseva A. M., Lebedev S. P., Bezmaternykh L. N.
Заглавие : Antiferromagnetic Resonance and Dielectric Properties of Rare-earth Ferroborates in the Submillimeter Frequency Range
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 113, Is. 1. - P113-120. - ISSN 1063-7761, DOI 10.1134/S106377611105013X
Примечания : Cited References: 27. - This work was supported by the Russian Foundation for Basic Research, project no. 10-02-00846.
Предметные рубрики: GDFE3(BO3)(4)
SPECTROSCOPY
CRYSTAL
Ключевые слова (''Своб.индексиров.''): antiferromagnetic resonance--basic parameters--effective anisotropy constant--ferroborates--ferroics--ferromagnetic orderings--frequency ranges--magnetic interactions--magnetoresonance--millimeter frequency range--rare earth ions--submillimeters--antiferromagnetic materials--crystallography--erbium--europium--ferromagnetic resonance--ion exchange--magnetic anisotropy--magnetic devices--magnetic structure--permittivity--resonance--antiferromagnetism
Аннотация: The magnetoresonance and dielectric properties of a number of crystals of a new family of multiferroics, namely, rare-earth ferroborates RFe(3)(BO(3))(4) (R = Y, Eu, Pr, Tb, Tb(0.25)Er(0.75)), are studied in the submillimeter frequency range (nu = 3-20 cm(-1)). Ferroborates with R = Y, Tb, and Eu exhibit permittivity jumps at temperatures of 375, 198, and 58 K, respectively, which are caused by the R32 - P3(1)2(1) phase transition. Antiferromagnetic resonance (AFMR) modes in the subsystem of Fe(3+) ions are detected in the range of antiferromagnetic ordering (T T(N)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : APLESNIN S. S.
Заглавие : FORMATION OF FERROMAGNETIC ORDER IN ANISOTROPIC FRUSTRATED ANTIFERROMAGNETS
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1992. - Vol. 34, Is. 2. - P554-560. - ISSN 0367-3294
Примечания : Cited References: 5
Предметные рубрики: COMPETING INTERACTIONS
MAGNETIC-PROPERTIES
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Influence of spin-phonon coupling on the magnetic moment in 2D spin-1/2 antiferromagnet
Место публикации : Phys. Lett. A. - 2003. - Vol. 313, Is. 1-2. - P.122-125. - ISSN 0375-9601, DOI 10.1016/S0375-9601(03)00689-3
Примечания : Cited References: 17
Предметные рубрики: SQUARE LATTICE
EU2CUO4
MODEL
Ключевые слова (''Своб.индексиров.''): 2d heisenberg model--spin-phonon interactions--2d heisenberg model--spin-phonon interactions--ferromagnetic material--anisotropy--article--liquid--magnetism--mathematical model--monte carlo method--quantum theory--thermal conductivity--vibration
Аннотация: The ground state of two-dimensional Heisenberg spin-1/2 antiferromagnet (AF) with the spin-phonon coupling is studied by the quantum Monte Carlo method. The magnetic moment per site, mean-square vibration of ion, phase diagram of AF long range order-quantum spin. liquid are simulated. The spin-phonon coupling is estimated for R2CuO4, R = Gd, Eu. (C) 2003 Elsevier Science B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Two-dimensional quantum spin liquid with S=1/2 spins interacting with acoustic phonons
Разночтения заглавия :авие SCOPUS: Two-dimensional quantum spin liquid with S = 1/2 spins interacting with acoustic phonons
Место публикации : Phys. Lett. A. - 2004. - Vol. 333, Is. 5-6. - P.446-449. - ISSN 0375-9601, DOI 10.1016/j.physleta.2004.10.064
Примечания : Cited References: 11
Предметные рубрики: ANTIFERROMAGNET
Ключевые слова (''Своб.индексиров.''): spin-phonon interactions--spin-liquid--spinon excitations--spin-liquid--spin-phonon interactions--spinon excitations--ferromagnetic material--acceleration--acoustics--article--density--energy--liquid--magnetic field--mathematical analysis--monte carlo method--phonon--quantum mechanics
Аннотация: The spin density of states of a two-dimensional antiferromagnet in magnetic field having spins-1/2 and interacting with acoustic phonons is investigated in the nonadiabatic approximation using the quantum Monte Carlo method. It is found the gap energy A in the single particle spin excitations spectrum closes at magnetic field Delta similar or equal to H-c, W-ph W-s and Delta similar or equal to (1/2)H-c, W-ph W-s, where W-ph and W-s are the bandwidths of phonon and spin excitations in antiferromagnet. (C) 2004 Elsevier B.V All rights reserved.
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10.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Burmitskikh A. V., Belyaev B. A., Boev N. M., Kleshnina S. A.
Заглавие : Automated measuring system for studying ferromagnetic resonance spectra in the radio frequency range
Коллективы : Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology, Уральский симпозиум IEEE по биомедицинской инженерии, радиоэлектронике и информационным технологиям
Место публикации : Ural symposium on biomedical engineering, radioelectronics and information technology (USBEREIT): Proceedings/ Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology (2021 ; May 13-14 ; Yekaterinburg (Hybrid event)): IEEE, 2021. - P.0267-0271. - DOI 10.1109/USBEREIT51232.2021.9455019
Примечания : Cited References: 13
Аннотация: The automated system for measuring ferromagnetic resonance spectra in the radio frequency range has been developed for measuring magnetic characteristics of thin films. The system allows measuring the spectrum of ferromagnetic resonance at a frequency of 12 MHz with a field step of 0.01 Oe (constant or variable) and with 0.0125° angle resolution. Automatic determination of the anisotropy field and automatic sensitivity adjustment of the measuring system allows obtaining data from permalloy thin magnetic films samples with thickness less than 50 nm. Measurements can be carried out with different directions of external magnetic fields (in the plane of the TMF sample) and with rotation of the sample in the external magnetic field. This is achieved by the independent automatic rotation of the sample and high-frequency Helmholtz coils. Processing and transmission of the received data in the digital form provides automatic processing and representation of measurement results on the PC screen. The measurement results can be used for TMF study, assessing the quality, rejection and further use in finished devices.
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