Персона: Кашурников, Владимир Анатольевич
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Руководитель научной группы "Квантовая инженерия сильно коррелированных систем"
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Кашурников
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Владимир Анатольевич
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- ПубликацияОткрытый доступНАМАГНИЧЕННОСТЬ СЛОИСТОГО АНИЗОТРОПНОГО СВЕРХПРОВОДНИКА В НАКЛОННОМ МАГНИТНОМ ПОЛЕ(НИЯУ МИФИ, 2025) МАКСИМОВА, А. Н.; МОРОЗ, А. Н.; КАШУРНИКОВ, В. А.; Мороз, Анна Николаевна; Максимова, Анастасия Николаевна; Кашурников, Владимир АнатольевичМетодом Монте-Карло для вихревой системы в слоистом анизотропном ВТСП выполнен расчет кривых намагниченности образца с наклонными колончатыми центрами пиннинга. Получена убывающая зависимость ширины петли перемагничивания от наклона магнитного поля к оси анизотропии. Рассчитаны величины угла между направлениями вихрей и магнитного поля, показано их соответствие для основной кривой намагничивания результатам анизотропной теории Гинзбурга-Ландау.
- ПубликацияТолько метаданныеRelaxation of the trapped magnetic flux in a mesoscopic HTS with artificial pinning in the form of submicron holes(2024) Maksimova, A. N.; Gokhfeld, D. M.; Moroz, A. N.; Kashurnikov, V. A.; Максимова, Анастасия Николаевна; Мороз, Анна Николаевна; Кашурников, Владимир Анатольевич
- ПубликацияТолько метаданныеInfluence of magnetic track inhomogeneities on the stability of magnetically levitated HTSs(2022) Kashurnikov, V.; Moroz, A.; Rudnev, I.; Кашурников, Владимир Анатольевич; Мороз, Анна Николаевна; Руднев, Игорь АнатольевичIEEEThe magnetization stability of a YBCO superconductor was numerically investigated using the Monte Carlo method. The magnetization-reversal curves of samples with various pinning configurations (periodic and random) were calculated, together with the minor loops caused by field inhomogeneities. The areas bounded by the partial loops provided estimations of hysteresis energy losses of samples for various ambient temperatures. Samples providing a balance between the critical current, pin-ning properties, and energy losses, were identified. Among the considered distributions, the homogeneous (periodic) defect con-figurations showed the highest efficiency.
- ПубликацияТолько метаданныеMagnetic and Transport Properties of Type-II Superconductors: Numerical Modeling and Experiment(2021) Kashurnikov, V. A.; Maksimova, A. N.; Rudnev, I. A.; Moroz, A. N.; Кашурников, Владимир Анатольевич; Максимова, Анастасия Николаевна; Руднев, Игорь Анатольевич; Мороз, Анна НиколаевнаThis review is devoted to various experimental and theoretical studies of the magnetic and transport properties of type-II superconductors. The main interest is in the study of the behavior of the vortex system, its dynamics, and interaction with pinning centers: defects. Two widely used methods of numerical simulation of a vortex system are considered here: Monte Carlo and molecular dynamics. The effects investigated by these methods, such as various phase transitions in the vortex lattice, its melting, and inverse crystallization, are described. The existing models of a layered anisotropic high-temperature superconductor in a magnetic field perpendicular and inclined with respect to the superconducting layers are considered. Methods, actively studied and applied in practice for improving the current-carrying characteristics of a superconductor by introducing various nano- and microscopic artificial defects, including those with ferromagnetic ordering, are described. Various effects observed in composite (including multilayer) ferromagnet-superconductor structures, which are still of interest, are considered.
- ПубликацияТолько метаданныеSimulations of local field inhomogeneities of magnetic tracks and their impact on the magnetization of HTSs with defects(2021) Moroz, A. N.; Rudnev, I. A.; Kashurnikov, V. A.; Мороз, Анна Николаевна; Руднев, Игорь Анатольевич; Кашурников, Владимир Анатольевич© 2021 Institute of Physics Publishing. All rights reserved.Using the Monte Carlo method, the full and partial magnetization loops of a YBCO superconductor have been studied. The partial loops simulated field inhomogeneities occurring on magnetic tracks in levitation systems. The influence of temperature and defect concentration on the shape and area of the full and partial hysteretic curves has been studied. The highest considered defect concentration provided the least partial curve area which meant less hysteresis energy losses and greater levitation stability.
- ПубликацияТолько метаданныеVortex System Dynamics upon Pulsed Magnetization of a HTS(2019) Moroz, A. N.; Maksimova, A. N.; Kashurnikov, V. A.; Rudnev, I. A.; Мороз, Анна Николаевна; Максимова, Анастасия Николаевна; Кашурников, Владимир Анатольевич; Руднев, Игорь Анатольевич© 2019, Pleiades Publishing, Ltd.A numerical investigation of the response of a HTS with different numbers of defects to the action of rectangular magnetic field pulses with a varying amplitude is carried out. The time dependences of a magnetic field trapped by the superconductor are calculated at different pulse parameters. The values of the HTS response to pulsed and gradual magnetization and demagnetization of the sample are compared, which reveals that magnetic flux trapping is more efficient under the action of pulses. A feature in the behavior of the vortex lattice acted on by field pulses is established, which relates to correlation between the number of defects and pulse amplitude. Flux trapping is shown to have a maximum dependent on the concentration of defects at each pulse amplitude.
- ПубликацияТолько метаданныеModeling of vortex dynamics in HTSs with defects under the impact of pulsed magnetic field(2021) Moroz, A. N.; Kashurnikov, V. A.; Rudnev, I. A.; Maksimova, A. N.; Мороз, Анна Николаевна; Кашурников, Владимир Анатольевич; Руднев, Игорь Анатольевич; Максимова, Анастасия НиколаевнаBy means of the Monte Carlo method, a numerical study of the vortex system in a high-temperature superconductor under the impact of pulses of magnetic field has been conducted. Various shapes and amplitudes of pulses have been considered. Samples with random and regular distributions of three different numbers of defects have been compared from the viewpoint of efficiency of flux trapping. The low-temperature behavior of vortices and their penetration into samples have been shown to be independent of the pulse shape but strongly dependent of the type of pinning distribution. Saturating dependences of density of trapped magnetic flux on the pulse amplitude have been obtained. The samples with random pinning demonstrated higher efficiency of flux trapping at lower pulse amplitudes, and the samples with a triangular lattice of defects-at higher amplitudes. If the amplitude exceeded the saturation field of both samples, the trapped field was almost equal. The increasing number of defects has lead to an increase in trapped field within the considered range of concentrations.
- ПубликацияТолько метаданныеStudy of Trapped Magnetic Field Relaxation in a Cylindrical Micron-Sized HTS(2023) Mikhailov, A. A.; Maksimova, A. N.; Moroz, A. N.; Kashurnikov, V. A.; Михайлов, Артём Александрович; Максимова, Анастасия Николаевна; Мороз, Анна Николаевна; Кашурников, Владимир Анатольевич
- ПубликацияТолько метаданныеThe "echo" effect in response to a current pulse acting on a superconductor in a magnetic field(2025) Maksimova, A. N.; Moroz, A. N.; Pokrovskii, S. V.; Aleksandrov, D. A.; Kashurnikov, V. A.; Максимова, Анастасия Николаевна; Мороз, Анна Николаевна; Покровский, Сергей Владимирович; Александров, Дмитрий Александрович; Кашурников, Владимир Анатольевич
- ПубликацияТолько метаданныеTrapped Field in Superconductors with Perforations(2022) Gokhfeld, D. M.; Maksimova, A. N.; Kashurnikov, V. A.; Moroz, A. N.; Максимова, Анастасия Николаевна; Кашурников, Владимир Анатольевич; Мороз, Анна Николаевна© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.The Monte Carlo method has been used to calculate the trapped magnetic field in superconducting plates with holes. The mechanism of flux pinning on the holes is implemented with special subprocesses added to the algorithm: vortex capture and emission, both occurring on the hole boundaries. Secondary peaks related to the holes emerge on the calculated profiles of the trapped magnetic field. It has been found that these peaks disappear in plates with sufficiently strong pinning or when the computational mesh is coarse (the case corresponding to a low resolution of probes in experiments). The dependence of the trapped field on the hole radius has been analyzed.