Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors
Stability of the vortex matter — magnetic flux lines penetrating into the material — in type-II superconductor films is crucially important for their application. If some vortices get detached from pinning centres, the energy dissipated by their motion will facilitate further depinning, and may trig...
Saved in:
| Published in: | Физика низких температур |
|---|---|
| Date: | 2018 |
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2018
|
| Subjects: | |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/176139 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors / J.I. Vestgården, T.H. Johansen, Y.M. Galperin // Физика низких температур. — 2018. — Т. 44, № 6. — С. 603-622. — Бібліогр.: 89 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862738154486759424 |
|---|---|
| author | Vestgården, J.I. Johansen, T.H. Galperin, Y.M. |
| author_facet | Vestgården, J.I. Johansen, T.H. Galperin, Y.M. |
| citation_txt | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors / J.I. Vestgården, T.H. Johansen, Y.M. Galperin // Физика низких температур. — 2018. — Т. 44, № 6. — С. 603-622. — Бібліогр.: 89 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | Stability of the vortex matter — magnetic flux lines penetrating into the material — in type-II superconductor films is crucially important for their application. If some vortices get detached from pinning centres, the energy dissipated by their motion will facilitate further depinning, and may trigger an electromagnetic breakdown. In this paper, we review recent theoretical and experimental results on development of the above mentioned thermomagnetic instability. Starting from linear stability analysis for the initial critical-state flux distribution we then discuss a numerical procedure allowing to analyze developed flux avalanches. As an example of this approach we consider ultra-fast dendritic flux avalanches in thin superconducting disks. At the initial stage the flux front corresponding to the dendrite’s trunk moves with velocity up to 100 km/s. At later stage the almost constant velocity leads to a specific propagation regime similar to ray optics. We discuss this regime observed in superconducting films coated by normal strips. Finally, we discuss dramatic enhancement of the anisotropy of the flux patterns due to specific dynamics. In this way we demonstrate that the combination of the linear stability analysis with the numerical approach provides an efficient framework for understanding the ultra-fast coupled nonlocal dynamics of electromagnetic fields and dissipation in superconductor films.
|
| first_indexed | 2025-12-07T20:02:55Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-176139 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T20:02:55Z |
| publishDate | 2018 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Vestgården, J.I. Johansen, T.H. Galperin, Y.M. 2021-02-03T18:39:52Z 2021-02-03T18:39:52Z 2018 Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors / J.I. Vestgården, T.H. Johansen, Y.M. Galperin // Физика низких температур. — 2018. — Т. 44, № 6. — С. 603-622. — Бібліогр.: 89 назв. — англ. 0132-6414 PACS: 74.25.Qt, 74.25.Ha, 68.60.Dv https://nasplib.isofts.kiev.ua/handle/123456789/176139 Stability of the vortex matter — magnetic flux lines penetrating into the material — in type-II superconductor films is crucially important for their application. If some vortices get detached from pinning centres, the energy dissipated by their motion will facilitate further depinning, and may trigger an electromagnetic breakdown. In this paper, we review recent theoretical and experimental results on development of the above mentioned thermomagnetic instability. Starting from linear stability analysis for the initial critical-state flux distribution we then discuss a numerical procedure allowing to analyze developed flux avalanches. As an example of this approach we consider ultra-fast dendritic flux avalanches in thin superconducting disks. At the initial stage the flux front corresponding to the dendrite’s trunk moves with velocity up to 100 km/s. At later stage the almost constant velocity leads to a specific propagation regime similar to ray optics. We discuss this regime observed in superconducting films coated by normal strips. Finally, we discuss dramatic enhancement of the anisotropy of the flux patterns due to specific dynamics. In this way we demonstrate that the combination of the linear stability analysis with the numerical approach provides an efficient framework for understanding the ultra-fast coupled nonlocal dynamics of electromagnetic fields and dissipation in superconductor films. THJ acknowledges the hospitality of Prof. Barbara
 Neuhauser during his sabbatical stay at San Francisco State
 University. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Обзор Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors Article published earlier |
| spellingShingle | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors Vestgården, J.I. Johansen, T.H. Galperin, Y.M. Обзор |
| title | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors |
| title_full | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors |
| title_fullStr | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors |
| title_full_unstemmed | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors |
| title_short | Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors |
| title_sort | nucleation and propagation of thermomagnetic avalanches in thin-film superconductors |
| topic | Обзор |
| topic_facet | Обзор |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/176139 |
| work_keys_str_mv | AT vestgardenji nucleationandpropagationofthermomagneticavalanchesinthinfilmsuperconductors AT johansenth nucleationandpropagationofthermomagneticavalanchesinthinfilmsuperconductors AT galperinym nucleationandpropagationofthermomagneticavalanchesinthinfilmsuperconductors |