Библиотека института физики им. Л.В. Киренского СО РАН

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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Shneyder E. I.
Заглавие : The interplay of phonon and magnetic mechanism of pairing in strongly correlated electron system of high-Tc cuprates
Коллективы : International Conference on New Theoreties, Discoveries & Applications of Superconductors and Related Materials, Zhongguancun International Consortium of R&D of Superconductivity Technology Inaugurating Meeting
Место публикации : Seventh International Conference on New Theoreties, Discoveries & Applications of Superconductors and Related Materials and Zhongguancun International Consortium of R&D of Superconductivity Technology Inaugurating Meeting: May 13-16, 2009, Beijing, China. - Ст.S1E0900
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korovushkin M. M.
Заглавие : Temperature and doping dependences of the Hall coefficient within the spin-fermion model of cuprates
Колич.характеристики :18 с
Место публикации : J. Low Temp. Phys. - 2025. - Vol. 218, Is. 5-6. - P.433-450. - ISSN 00222291 (ISSN), DOI 10.1007/s10909-025-03265-8. - ISSN 15737357 (eISSN)
Примечания : Cited References: 82. - The study is performed within the State Assignment of the Kirensky Institute of Physics
Аннотация: In the framework of an ensemble of spin-polaron quasiparticles formed owing to the strong coupling between the spins of copper ions and holes on oxygen ions in cuprate superconductors, the temperature dependences of the Hall coefficient RH for undoped, lightly doped, underdoped, optimally doped and overdoped regimes are calculated. The anomalous behavior of kinetic coefficients is considered beyond the relaxation-time approximation within the multi-moment method for solving kinetic equation. Dependences RH(T) calculated in the four-moment approach for noted doping regimes demonstrate the main qualitative peculiarities of the dependences found in the experiments on the Hall effect in cuprates. It is shown that change of the hopping integral of oxygen holes influences on the modification of anomalous sharp drop and change of RH sign observed experimentally at low temperatures in underdoped regime.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shestakov V. A., Korshunov M. M.
Заглавие : Thermodynamics of s±-to- s++ transition in iron pnictides in the vicinity of the Born limit
Колич.характеристики :8 с
Место публикации : Supercond. Sci. Technol. - 2025. - Vol. 38, Is. 5. - Ст.055002. - ISSN 09532048 (ISSN), DOI 10.1088/1361-6668/adc8dd. - ISSN 13616668 (eISSN)
Примечания : Cited References: 55
Аннотация: To study the thermodynamic properties of the disorder-induced transition between s± and s++ superconducting gap functions, we calculate the grand thermodynamic potential Ω in the normal and the superconducting states. An expression for the difference between the two, ΔΩ, is derived for a two-band model for Fe-based systems with nonmagnetic impurities. The disorder is considered in a T-matrix approximation within the multiband Eliashberg theory. In the vicinity of the Born limit near the s±-to- s++ transition, we find two solutions obtained for opposite directions of the system’s evolution with respect to the impurity scattering rate. By calculating the change in entropy ΔS and the change in the electronic specific heat ΔC from ΔΩ, we show that such a hysteresis is not due to the time-reversal symmetry breaking state, but that it instead points to the first order phase transition (PT) induced by the nonmagnetic disorder. Based on the ΔΩ calculations, a phase diagram is plotted representing the energetically favorable s± and s++ states and the transition between them. At finite temperature, a first order PT line there is limited by a critical end point. Above that point, the sharp s±→s++ transition transforms into a crossover between s± and s++ states.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : Magnetic flux trapping in porous high-Tc superconductors
Колич.характеристики :4 с
Место публикации : Phys. C: Supercond. Appl. - 2024. - Vol. 619. - Ст.1354486. - ISSN 09214534 (ISSN), DOI 10.1016/j.physc.2024.1354486. - ISSN 18732143 (eISSN)
Примечания : Cited References: 39
Аннотация: Porosity affects the properties of high-Tc superconductors and can improve their performance by enhancing oxygenation, cryocooling, etc. Among other factors, the presence of pores plays a significant role in the process of magnetic flux trapping. Relationships with the porosity manifest in the irreversibility field, the full penetration field, and the remnant magnetization of the samples. To account for the effect of porosity on the trapped magnetic flux into type-II superconductors, a simple toy model is suggested. Generally, as the porosity increases, the trapped flux and related parameters tend to diminish. However, in the case of microscopic samples, porosity can enhance magnetic flux trapping.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Petrov M. I., Semenov S. V., Balaev A. D., Nemtsev I. V., Vasiliev A. D., Molokeev M. S.
Заглавие : Larger grains in high-Tc superconductors synthesized by the solid-state reaction route
Колич.характеристики :5 с
Место публикации : Ceram. Int. - 2024. - Vol. 50, Is. 24, Part A. - P.52213-52217. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2024.09.268. - ISSN 18733956 (eISSN)
Примечания : Cited References: 42
Аннотация: Solid-state synthesis is widely used in exploratory research to study various structural modifications that affect the properties (critical temperature, critical current density, irreversibility field, etc.) of superconductors. The popularity of this method is due to its relative simplicity and availability of the necessary equipment. Combining solid-state synthesis and top-seeded melt growth allows us to increase the grain size in a Tm- and Nd-based 1-2-3 superconductor. Samples with a grain size up to 0.1 mm have been obtained. X-ray diffraction, scanning electron microscopy and magnetization measurements have been used for investigating this superconducting material. The magnetization width ΔM has increased significantly in the synthesized samples. However the temperature dependence of the intragrain critical current density and the pinning force scaling give evidences that the pinning mechanism in the obtained superconductor is essentially the same as in polycrystalline superconductors synthesized by standard solid-state technology. The increase in grain size in the synthesized samples is the main reason for the high values of ΔM.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : Description of resistive transition for type-II superconductors
Колич.характеристики :5 с
Место публикации : J. Supercond. Nov. Magn. - 2024. - Vol. 38, Is. 1. - Ст.32. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-024-06894-4. - ISSN 15571947 (eISSN)
Примечания : Cited References: 33
Аннотация: The Boltzmann sigmoid function effectively describes parameter changes during transitions between different states. A method using the Boltzmann function is proposed to analyze the temperature dependencies of superconductors near their critical temperature. Data for various superconductors (MgB2, YBCO, Bi2212, a high-entropy alloy, CeH9) are described, and parameters characterizing their resistive transition are estimated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Иванов Д. А., Коршунов, Максим Михайлович
Заглавие : Спин-орбитальное взаимодействие в пятиорбитальной модели ферропниктидов
Колич.характеристики :7 с
Место публикации : Сверхпроводимость: фунд. и приклад. исслед. - 2024. - № 4. - С. 12-18. - ISSN 29495644 (ISSN), DOI 10.62539/2949-5644-2024-0-4-12-18; Supercond. Fund. Appl. Res. - ISSN 29495660 (eISSN0
Примечания : Библиогр.: 20
Аннотация: Исследовано влияние спин-орбитального взаимодействия на зонную структуру и поверхность Ферми в пятиорбитальной модели сверхпроводников на основе железа. Так как в элементарной ячейке находятся два иона Fe и их орбитали опосредованно связаны через орбитали As, в эффективной модели введены константы внутри- и межионного спин-орбитального взаимодействия, чтобы исследовать влияние соответствующих вкладов на зонную структуру. Показано, что внутриионная и межионная части спин-орбитального взаимодействия приводят к изменению топологии поверхности Ферми – расщеплению четырех контуров Ферми вокруг точки M = (π, π).The effect of spin-orbit coupling on the band structure and Fermi surface in the five-orbital model for iron-based superconductors is studied. Since there are two iron ions in the unit cell and their orbitals indirectly coupled through as orbitals, we introduce the constants of the intra- and inter-ion spin-orbit coupling in the effective model to separate the effect of the corresponding contributions on the band structure. We show that the intra- and inter-ion parts of the spinorbit coupling lead to Fermi surface topology change – splitting of the four contours of the Fermi surface around the point M = (π, π).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shestakov V. A., Korshunov M. M.
Заглавие : Relative phase between s± superconducting order parameter components in a two-band model with impurities
Колич.характеристики :6 с
Коллективы : Nanophysics and Nanoelectronics, International Symposium
Место публикации : Phys. Solid State. - 2024. - Vol. 66, Is. 8. - P.1211-1216. - ISSN 10637834 (ISSN), DOI 10.61011/PSS.2024.08.59037.51HH. - ISSN 10906460 (eISSN)
Примечания : Cited References: 14
Аннотация: We obtain solutions for Eliashberg equations within the Nambu representation for a two-band model of iron-based superconductors with nonmagnetic impurities. Two cases of a transition between s± and s++ states are considered: (i) the transition is accompanied by the abrupt change of the order parameter sign within one of the bands and (ii) the change is smooth. For both cases, we studied the role of a gauge defined by the coefficients preceding the Pauli matrices tau1 and tau2 in a self-energy expansion, which correspond to the components of the order parameter. We show that the absolute value of the order parameter is conserved for solutions in the clean and in the Born limits. In an intermediate case, between the Born and unitary limits, result depends on the solution for the clean limit. We show that a common gauge for the Eliashberg equations in which one of the order parameter components vanishes is essential for adequate description of the multiband superconducting systems.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Semenov S. V., Petrov M. I., Nemtsev I. V., Balaev D. A.
Заглавие : Anisotropy and crystallite misalignment in textured superconductors
Место публикации : J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 1. - P.59-65. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-022-06454-8. - ISSN 15571947 (eISSN)
Примечания : Cited References: 21. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project “Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements” No. 20–42–240008
Аннотация: A misalignment of anisotropic crystallites causes small values of anisotropy and decreases the critical current density of textured polycrystalline superconductors. To relate the crystallite misalignment and out-plane anisotropy, the magnetic properties of the textured Bi2223 polycrystalline superconductor were investigated. A distribution of orientation angles of crystallites was determined using different data: scanning electron microscopy images and hysteresis magnetization loops when an external magnetic field was applied at different angles with respect to the texturing plane of the sample. It was demonstrated that the standard deviation of the distribution and the magnetic disorder angle of crystallites in textured samples can be determined from the magnetization data in perpendicular directions. These data may be either the irreversible magnetization measured for two different orientations of the sample or the simultaneously measured magnetization projections parallel and perpendicular to the magnetic field.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zlotnikov A. O.
Заглавие : Majorana vortex modes in spin-singlet chiral superconductors with noncollinear spin ordering: Local density of states study
Место публикации : Phys. Rev. B. - 2023. - Vol. 107, Is. 14. - Ст.144513. - ISSN 24699950 (ISSN), DOI 10.1103/PhysRevB.107.144513. - ISSN 24699969 (eISSN)
Примечания : Cited References: 71. - I am grateful for fruitful discussions with participants of the seminar of Laboratory of Theoretical Physics in Kirensky Institute of Physics, especially with V. V. Val'kov, S. V. Aksenov, A. D. Fedoseev, and M. S. Shustin. The reported study was funded by the Theoretical Physics and Mathematics Advancement Foundation “BASIS”
Аннотация: In this study, topologically nontrivial edge and vortex bound states are described in the coexistence phase of chiral spin-singlet superconductivity and noncollinear spin ordering on a triangular lattice in the presence of few (up to four) vortices. We consider the topological phase transition induced by the magnetic order between the phase hosting Majorana modes and the initial phase of the chiral d-wave superconductivity supporting non-Majorana modes which is also topologically nontrivial. The change of the excitation spectrum at the critical point is obtained in both cases of open and periodic boundary conditions in the presence of vortices. It is proved that zero-energy Majorana modes localized at vortex cores are caused by noncollinear long-range magnetic ordering. Even though nearby excitation energies of subgap states including the edge-localized and vortex-localized states are very close to each other, the energy difference between different vortex bound states is an order of magnitude higher. This difference determines the energy gap for Majorana vortex modes separating them from other vortex bound states. It is found that even in the presence of noncollinear spin ordering its value can be estimated from the excitation energy of vortex bound states in the pure chiral d-wave state for the nonmagnetic case. By studying local density of states near the vortex cores the possibility to experimentally detect the described Majorana vortex modes by scanning tunneling microscopy is discussed. It is demonstrated that Majorana vortex modes and Majorana antivortex modes induced by noncollinear magnetism have different features in energy and spatially resolved density of states due to the chiral symmetry on the superconducting order parameter.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanov D. A., Togushova Y. N., Korshunov M. M.
Заглавие : Changes of the Fermi surface topology in the three-orbital model for iron pnictides with the spin-orbit coupling
Колич.характеристики :9 с
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2023. - Vol. 16, Is. 6. - P.795-803. - ISSN 19971397 (ISSN); Журн. СФУ. Матем. и физ. - ISSN 23136022 (eISSN)
Примечания : Cited References: 28
Аннотация: Effect of the spin-orbit coupling on the band structure and the Fermi surface of the three-orbital model is studied. The inter-orbital part of the model is reformulated to fully conform with the iron lattice symmetry. Because there are two iron ions in the unit cell, we introduce the intra-and inter-ion spin-orbit coupling constants to separate the effect of the related couplings on the band structure and the Fermi surface. Both the intra-and inter-ion parts lift the degeneracy of some bands at the Γ = (0, 0) point and the splitting of bands along the (0, π) ‒ (π, π) direction of the Brillouin zone. We show that the inter-ion part of the spin-orbit coupling leads to the topological change of the Fermi surface — the splitting of two Fermi surface sheets around the M = (π, π) point.Изучено влияние спин-орбитального взаимодействия на зонную структуру и поверхность Ферми в трехорбитальной модели. Межорбитальная часть модели изменена для полного соответствия с симметрией решетки железа. Из-за наличия двух ионов железа в элементарной ячейке мы вводим внутри- и межионную константы спин-орбитального взаимодействия для разделения эффектов соответствующих взаимодействий на зонную структуру и поверхность Ферми. И внутри, и межионная части снимают вырождение некоторых зон в точке Γ = (0, 0) и вырождение вдоль направления (0, π) − (π, π) зоны Бриллюэна. Показано, что межионная часть спин-орбитального взаимодействия приводит к изменению топологии поверхности Ферми, а именно к разделению листов поверхности Ферми вблизи точки M = (π, π).
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : On estimating the critical current density in polycrystalline superconductors synthesized by solid-state method
Место публикации : J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 4. - P.1089-1092. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-023-06575-8. - ISSN 15571947 (eISSN)
Примечания : Cited References: 38
Аннотация: In a recent paper, Zhang et al. [1] studied the effect of a Pb content on the superconducting properties of Bi-2223. Some earlier, Ramirez et al. [2] explored the effect of compaction pressure on the Bi-2212. In both studies, the critical current densities were estimated and compared for a series of polycrystalline superconducting samples. The synthesis conditions for the highest critical current density were claimed in both works. This comment explains that the average granule size should be used instead of the sample size in the Bean formula for the polycrystalline superconductors synthesized by solid-state, sol–gel, electrospinning, and solution blow spinning methods. The corrected estimations for the commented articles conclude that the synthesis conditions affect both the granule size and the intragranular critical current density. The synthesis parameters for the highest critical current density conditions are clarified.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nekrasov I., Ovchinnikov S. G.
Заглавие : Hydrides under high pressure
Место публикации : J. Supercond. Nov. Magn. - 2022. - Vol. 35, Is. 4: Road to Room Temperature Superconductivity. - P.959-963. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-021-06087-3
Примечания : Cited References: 44. - This work was partially supported by RFBR grant No. 20-02-00011
Аннотация: The experimental discovery of the highest, up to 0 degree Celsius, superconducting transition temperatures Tc in the class of so-called hydrides under high pressure is undoubtedly the striking event in modern physics. In this paper, we give a short overview of the some history of the room-temperature conventional superconductivity. A theoretical description of such high Tc, as was shown and even predicted in a number of ab initio works, can be unambiguously given in the framework of the electron–phonon mechanism of Cooper pairing. Thus, the basic equation to calculate Tc will be the one proposed in 1957 by Bardeen, Cooper, and Schriefer. It is known that in this case the value of Tc is directly determined by a number of effective parameters: the Debye frequency, the density of electronic states at the Fermi level, and the electron–phonon interaction constant. Within the framework of the modern development of the density functional theory, all these quantities can be obtained using standard packages for band structure calculations.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunovich L. V., Korshunov M. M.
Заглавие : Band structure of organic-ion-intercalated (EMIM)xFeSe superconductor
Место публикации : Materials. - 2022. - Vol. 15, Is. 5. - Ст.1856. - ISSN 19961944 (ISSN), DOI 10.3390/ma15051856
Примечания : Cited References: 62. - This work was supported in part by Russian Science Foundation (Project 19-73-10015)
Аннотация: The band structure and the Fermi surface of the recently discovered superconductor (EMIM)xFeSe are studied within the density functional theory in the generalized gradient approximation. We show that the bands near the Fermi level are formed primarily by Fe-d orbitals. Although there is no direct contribution of EMIM orbitals to the near-Fermi level states, the presence of organic cations leads to a shift of the chemical potential. It results in the appearance of small electron pockets in the quasi-two-dimensional Fermi surface of (EMIM)xFeSe.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Maksimova A. N., Kashurnikov V. A., Moroz A. N.
Заглавие : Optimizing trapped field in superconductors with perforations
Место публикации : Physica C. - 2022. - Vol. 600. - Ст.1354106. - ISSN 0921-4534, DOI 10.1016/j.physc.2022.1354106
Примечания : Cited References: 28. - The reported study was partly funded by RFBR and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project 20-42-240008 (D.M. Gokhfeld) and by RFBR and ROSATOM according to the research project 20-21-00085 (V.A. Kashurnikov, A.N. Moroz)
Аннотация: The use of artificial holes can improve the performance of high-temperature bulk superconductors. We report the results of Monte Carlo simulations of the trapped magnetic flux in superconducting samples with different configurations of perforated holes. Vortex trapping and emission at the hole boundary were modeled to account for flux pinning on the holes. It was found that the trapped flux can reach its maximum value, which does not depend on the number of holes. The dependence of the trapped flux on the diameter and number of holes is explored and described by the suggested relations that account for pinning on the holes and the effective hole area. Recommendations are provided to attain the maximum trapped flux for a fixed number or diameter of holes.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Semenov S. V., Nemtsev I. V., Yakimov I. S., Balaev D. A.
Заглавие : Magnetic ion substitution and peak effect in YBCO: the strange case of Y1–xGd xBa2Cu3O7–δ
Место публикации : J. Supercond. Novel Magn. - 2022. - Vol. 35, Is. 10. - P.2679-2687. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-022-06317-2
Примечания : Cited References: 50. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project “Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements” No. 20-42-240008
Аннотация: We present the results of a study of the superconducting and paramagnetic properties of polycrystalline Y1–xGdxBa2Cu3O7–δ samples. The critical current density and critical temperature of YBCO were weakly decreased by the Gd doping. A peak effect, which is a nonmonotonic dependence of the critical current density on magnetic field, was detected for all samples. The peak position shifted to higher magnetic fields with increasing Gd content. This behavior is opposite to the shift of the peak effect observed for other YBCO compounds doped by magnetic ions. This unusual behavior is apparently related to the realized granular structure instead of the type of doping ion. A correlation between the peak position and the granule size was found in the investigated samples and other polycrystalline YBCO compounds.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makarov I. A., Ovchinnikov S. G.
Заглавие : Enhanced s*-wave component of the superconducting gap in overdoped HTSC cuprates with orthorhombic distortion
Место публикации : Phys. Lett. A. - 2022. - Vol. 444. - Ст.128226. - ISSN 03759601 (ISSN), DOI 10.1016/j.physleta.2022.128226
Примечания : Cited References: 67. - We would like to especially thank A. Bianconi for new ideas, useful discussions, and suggestions. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science according to the research project “Studies of superexchange and electron-phonon interactions in correlated systems as a basis for searching for promising functional materials” No. 20-42-240016
Аннотация: In this work, the concentration and temperature dependence of the superconducting gap of the HTSC cuprate in the orthorhombic phase are obtained within the framework of the Hubbard model taking into account the exchange mechanism of pairing. To elucidate the reasons for the unexpectedly large s*-wave component of the superconducting gap in the overdoped regime, the electronic structure of low-energy excitations and the k-dependent contributions of pair states to the gap components were investigated. It is shown that the s*-wave component growth results from the shallowing of the electron pocket in the region of the s*-wave component maximum.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korshunov M. M., Kuzmichev S. A., Kuzmicheva T. E.
Заглавие : Direct observation of the spin exciton in Andreev spectroscopy of iron-based superconductors
Место публикации : Materials. - 2022. - Vol. 15, Is. 17. - Ст.6120. - ISSN 19961944 (ISSN), DOI 10.3390/ma15176120
Примечания : Cited References: 50. - All authors acknowledge support by the state assignment of the Ministry of Science and Higher Education of the Russian Federation, nos. 0023-2019-0005 and 0287-2021-0035
Аннотация: Quasiparticle excitations provide viable information on the physics of unconventional superconductors. Higgs and Leggett modes are some of the classic examples. Another important bosonic excitation is the spin exciton originating from the sign-changing superconducting gap structure. Here we report a direct observation of the temperature-dependent spin exciton in the Andreev spectra of iron-based superconductors. Combined with the other experimental evidence, our observation confirms the extended s-wave (s±) order parameter symmetry and indirectly proves the spin-fluctuation mechanism of Cooper pairing.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aksenov S. V., Fedoseev A. D., Shustin M. S., Zlotnikov A. O.
Заглавие : Effective interactions in higher-order topological superconductors with strong electron correlations
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. I: Magnetism and superconductivity. - Ст.I.P7. - P.164-165. - ISBN 978-5-94469-051-7
Примечания : Cited References: 7. - The study was supported by Russian Science Foundation, project 22-22-20076
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Maksimova A. N., Kashurnikov V. A., Moroz A. N., Gokhfeld D. M.
Заглавие : Trapped field in superconductors with perforations
Коллективы : RFBRRussian Foundation for Basic Research (RFBR) [20-21-00085]; ROSATOM [20-21-00085]
Место публикации : J. Supercond. Nov. Magn. - 2022. - Vol. 35, Is. 1. - P.283-290. - ISSN 1557-1939, DOI 10.1007/s10948-021-06067-7. - ISSN 1557-1947(eISSN)
Примечания : Cited References: 35. - The reported study was funded by RFBR and ROSATOM according to the research project No 20-21-00085 (V.A. Kashurnikov, A.N. Moroz)
Предметные рубрики: MAGNETIZATION
BULK
Аннотация: 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.
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