Magnetic properties of conventional superconductors with columnar defects
Equilibrium vortex configuration in conventional type II superconductors containing short-range columnar defects is investigated theoretically. In the bulk superconductor near the upper critical field Hс₂ a single defect causes a strong local deformation of the vortex lattice which has C₃ or C₆ poin...
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| Published in: | Физика низких температур |
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| Date: | 1999 |
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| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
1999
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/138986 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Magnetic properties of conventional superconductors with columnar defects / S.A. Gredeskul, Yshai Avishai, G.M. Braverman // Физика низких температур. — 1999. — Т. 25, № 8. — С. 824-837. — Бібліогр.: 25 назв. — англ. |
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Gredeskul, S.A. Yshai Avishai Braverman, G.M. 2018-06-19T18:19:47Z 2018-06-19T18:19:47Z 1999 Magnetic properties of conventional superconductors with columnar defects / S.A. Gredeskul, Yshai Avishai, G.M. Braverman // Физика низких температур. — 1999. — Т. 25, № 8. — С. 824-837. — Бібліогр.: 25 назв. — англ. 0132-6414 https://nasplib.isofts.kiev.ua/handle/123456789/138986 Equilibrium vortex configuration in conventional type II superconductors containing short-range columnar defects is investigated theoretically. In the bulk superconductor near the upper critical field Hс₂ a single defect causes a strong local deformation of the vortex lattice which has C₃ or C₆ point symmetry. The vortices can collapse onto attractive defect, while in the case of repulsion the regions free of vortices appear near a defect. Increasing the applied magnetic field results in an abrupt change of the configuration of vortices related to the formation of multiquantum vortices and giving rise to reentering transitions between configurations with C₃ or C₆ symmetry. In the case of a small concentration of defects these transitions manifest themselves as jumps of magnetization and discontinuities of the magnetic susceptibility. Columnar defects also essentially influence the magnetic properties of a mesoscopic superconducting disc. They help the penetration of vortices into the sample, thereby decreasing the sample magnetization and reducing its upper critical field. Even the presence of weak defects splits a giant vortex state (usually appearing in a clean disc in the vicinity of the transition to a normal state) into a number of vortices with smaller topological charges. In a disc with a sufficient number of strong enough defects vortices are always placed onto defects. The presence of defects lead to the appearance of additional magnetization jumps related to the redistribution of vortices which are already present on the defects and not to the penetration of new vortices. This research is supported by grants from the Israel Academy of Science «Mesoscopic effects in type II superconductors with short-range pinning inhomogeneities» (S.G.) and «Center of Excellence» (Y.A.) and by a DIP grant for German-Israel collaboration (Y.A.). en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Свеpхпpоводимость, в том числе высокотемпеpатуpная Magnetic properties of conventional superconductors with columnar defects Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Magnetic properties of conventional superconductors with columnar defects |
| spellingShingle |
Magnetic properties of conventional superconductors with columnar defects Gredeskul, S.A. Yshai Avishai Braverman, G.M. Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| title_short |
Magnetic properties of conventional superconductors with columnar defects |
| title_full |
Magnetic properties of conventional superconductors with columnar defects |
| title_fullStr |
Magnetic properties of conventional superconductors with columnar defects |
| title_full_unstemmed |
Magnetic properties of conventional superconductors with columnar defects |
| title_sort |
magnetic properties of conventional superconductors with columnar defects |
| author |
Gredeskul, S.A. Yshai Avishai Braverman, G.M. |
| author_facet |
Gredeskul, S.A. Yshai Avishai Braverman, G.M. |
| topic |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| topic_facet |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| publishDate |
1999 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
Equilibrium vortex configuration in conventional type II superconductors containing short-range columnar defects is investigated theoretically. In the bulk superconductor near the upper critical field Hс₂ a single defect causes a strong local deformation of the vortex lattice which has C₃ or C₆ point symmetry. The vortices can collapse onto attractive defect, while in the case of repulsion the regions free of vortices appear near a defect. Increasing the applied magnetic field results in an abrupt change of the configuration of vortices related to the formation of multiquantum vortices and giving rise to reentering transitions between configurations with C₃ or C₆ symmetry. In the case of a small concentration of defects these transitions manifest themselves as jumps of magnetization and discontinuities of the magnetic susceptibility. Columnar defects also essentially influence the magnetic properties of a mesoscopic superconducting disc. They help the penetration of vortices into the sample, thereby decreasing the sample magnetization and reducing its upper critical field. Even the presence of weak defects splits a giant vortex state (usually appearing in a clean disc in the vicinity of the transition to a normal state) into a number of vortices with smaller topological charges. In a disc with a sufficient number of strong enough defects vortices are always placed onto defects. The presence of defects lead to the appearance of additional magnetization jumps related to the redistribution of vortices which are already present on the defects and not to the penetration of new vortices.
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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/138986 |
| citation_txt |
Magnetic properties of conventional superconductors with columnar defects / S.A. Gredeskul, Yshai Avishai, G.M. Braverman // Физика низких температур. — 1999. — Т. 25, № 8. — С. 824-837. — Бібліогр.: 25 назв. — англ. |
| work_keys_str_mv |
AT gredeskulsa magneticpropertiesofconventionalsuperconductorswithcolumnardefects AT yshaiavishai magneticpropertiesofconventionalsuperconductorswithcolumnardefects AT bravermangm magneticpropertiesofconventionalsuperconductorswithcolumnardefects |
| first_indexed |
2025-12-01T08:41:54Z |
| last_indexed |
2025-12-01T08:41:54Z |
| _version_ |
1850859729986781184 |