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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) : Velikanov D. A.
Заглавие : High-sensitivity measurements of the magnetic properties of materials at cryogenic temperatures
Место публикации : Inorg. Mater.: Appl. Res. - 2020. - Vol. 11, Is. 4. - P.801-808. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113320040413
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk Krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activity, project no. 17-42-240080 “Study of the Effect of the Size, Morphology, and Fabrication Technology on the Functional Properties of Biomagnetic Nanodevices Based on 3 d Metals and Their Oxides.”
Аннотация: An original magnetometer based on a dc superconducting quantum interferometer is described. The design features of the device are discussed and functional diagrams of its new units are presented. The magnetic moment measurement methods that optimize the measurement process are proposed. Examples of the investigations carried out on the samples of different materials are given. The factors affecting the reliability of the magnetic measurements are considered.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Boev N. M., Izotov A. V., Solovyev P. N., Tyurnev V. V.
Заглавие : Study of the weak field sensor on the resonant microstrip structure with a thin ferromagnetic film
Место публикации : Russ. Phys. J. - 2018. - Vol. 61, Is. 8. - P.1367-1375. - ISSN 10648887 (ISSN), DOI 10.1007/s11182-018-1544-x
Примечания : Cited References: 19. - This research was performed with support of the Russian Ministry of Education and Science, project No. RFMEFI60417X0179.
Ключевые слова (''Своб.индексиров.''): microstrip resonator--thin magnetic film--frequency response--sensor of weak magnetic fields--quality factor--scattering matrix--magnetometer
Аннотация: The paper examines the characteristics of the miniature sensor of weak magnetic fields on the resonant microstrip structure with a thin ferromagnetic film. The authors calculated the frequency response of irregular microstrip resonator containing anisotropic magnetic film in quasi-static approximation. The resonator is connected to transmission lines via coupling capacities. The authors determined the optimal directional angles of the constant magnetic displacement field ensuring maximum sensitivity of the sensor. They examined the impact of angular and amplitude dispersion of uniaxial magnetic anisotropy of thin film upon the sensor characteristics. The regularities determined in this research qualitatively agree with the experimental results.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lepeshev A. A., Karpov I. V., Ushakov A. V., Balaev D. A., Krasikov A. A., Dubrovskiy A. A., Velikanov D. A., Petrov M. I.
Заглавие : Particularities of the magnetic state of CuO nanoparticles produced by low-pressure plasma arc discharge
Коллективы : Russian Science Foundation [16-19-10054]
Место публикации : J. Supercond. Nov. Magn.: Springer, 2017. - Vol. 30, Is. 4. - P.931-936. - ISSN 1557-1939, DOI 10.1007/s10948-016-3885-4. - ISSN 1557-1947(eISSN)
Примечания : Cited References:38. - The work was performed with a support of the grant of the Russian Science Foundation (project no. 16-19-10054)
Предметные рубрики: IRON-OXIDE NANOPARTICLES
PLASMACHEMICAL SYNTHESIS
POROUS-GLASS
Ключевые слова (''Своб.индексиров.''): cuo nanoparticles--plasmachemical synthesis--magnetic properties--vibration magnetometer
Аннотация: Copper oxide nanoparticles were produced by direct plasmachemical synthesis in a plasma arc discharge of low pressure. The formation of CuO nanoparticles with an average size of 12 nm and narrow size distribution intervals was determined by using the x-ray diffraction analysis and TEM microscopy methods. It was defined by using a vibration magnetometer and a SQUID magnetometer, that the magnetic properties of CuO nanoparticles with such size were extremely different from the magnetic properties of bulk antiferromagnetic CuO. Structural defects caused the formation of a ferromagnetic state, remaining at least up to the room temperature. The temperature of corresponding antiferromagnetic ordering was significantly decreased (down to ∼ 100 K). Meanwhile, some of the copper surface spins showed a spin-glass behavior at low temperatures.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Бабицкий, Александр Николаевич, Беляев, Борис Афанасьевич, Боев, Никита Михайлович, Изотов, Андрей Викторович
Заглавие : Low noise wideband thin-film magnetometer
Коллективы : IEEE International Conference "Sensors"
Место публикации : IEEE Int. Conf. "Sensors-2017": proceedings. - 2017. - P.316-318
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Babitskii A. N., Belyaev B. A., Boev N. M., Izotov A. V.
Заглавие : Low noise wideband thin-film magnetometer
Коллективы : IEEE International Conference "Sensors"
Место публикации : Proceedings of IEEE Sensors. - 2017. - Vol. 2017-December: 16th IEEE SENSORS Conference, ICSENS 2017 (30 October 2017 through 1 November 2017, Glasgow, UK) Conference code: 132067. - P.1-3. - , DOI 10.1109/ICSENS.2017.8233972
Примечания : Cited References: 4. - This work was supported by the Ministry of Education and Science of the Russian Federation, Task no. 3.1031.2017/PCh.
Ключевые слова (''Своб.индексиров.''): magnetic sensor--magnetometer--magnetic field measurement--thin magnetic film
Аннотация: A novel low noise and wide bandwidth thin magnetic film magnetometer based on a ferromagnetic resonance phenomenon is presented in the article. The magnetometer is characterized by a high sensitivity in a wide frequency range - from a direct component of the field and up to 105...108 Hz. The magnetometer noise level is lower 10-12 T/Hz1/2 at frequencies above 102 Hz. The magnetometer conversion factor is constant at the whole operating frequency band. The developed magnetometer is simple and inexpensive for mass production.
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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) : Babitskii A. N., Belyaev B. A., Skomorokhov G. V., Izotov A. V., Galeev R. G.
Заглавие : A weak-field magnetometer based on a resonator microstrip transducer with thin magnetic films
Коллективы : Ministry of Education and Science of the Russian Federation, state order for Siberian Federal University [3.528.2014K]
Место публикации : Tech. Phys. Lett.: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 41, Is. 4. - P.324-327. - ISSN 1063, DOI 10.1134/S1063785015040021. - ISSN 10906533(eISSN)
Примечания : Cited References:12. - This study was supported by the Ministry of Education and Science of the Russian Federation, state order for Siberian Federal University in 2014, task no. 3.528.2014K.
Аннотация: A high-sensitivity magnetometer of weak quasi-stationary magnetic fields is developed and investigated. The magnetometer transducer is a microstrip resonator with an active medium from thin magnetic films prepared by magnetron sputtering of a Ni75Fe25 permalloy target. It is demonstrated that the transducer exhibits the maximum sensitivity not only in the optimal dc magnetic field, but also at the optimal deviation of this field from the rf pump field polarization direction. The magnetometer operates in a wide dynamic range of measured magnetic fields from 10−4 to 10−2 μT at frequencies of 10−1–105 Hz.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Izotov A. V., Babitskii A. N., Belyaev B. A., Boev, N. M., Skomorokhov G. V., Galeev R. G.
Заглавие : Microstrip construction of weak-field magnetometer
Коллективы : International scientific conference magnetic measurements
Место публикации : International Scientific Conference "Magnetic Measurements": program. - 2015. - Ст.P8-01
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Беляев, Борис Афанасьевич, Бабицкий, Александр Николаевич, Боев, Никита Михайлович, Галеев, Ринат Гайсеевич
Заглавие : Малогабаритный датчик слабых магнитных полей на основе тонких магнитных пленок
Место публикации : Изв. вузов. Физика: Томский государственный университет, 2015. - Т. 58, № 8/2. - С. 75-77. - ISSN 0021-3411
Примечания : Библиогр.: 1
Ключевые слова (''Своб.индексиров.''): датчик магнитного поля--магнитометр--тонкие магнитные пленки--magnetic field sensor--magnetometer--thin magnetic films
Аннотация: Разработан и исследован малогабаритный высокочувствительный датчик слабых магнитных полей на основе тонких магнитных пленок. Использование специально созданных тонких магнитных пленок и современных электронных компонентов позволило минимизировать размеры датчика при сохранении высокой чувствительности.A small highly sensitive thin magnetic film magnetometer was developed and researched. The use of special thin magnetic films and modern radio components allowed creating a small field sensor with high sensitivity.
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