| Full text | |
| Author(s): |
Colauto, F.
[1]
;
Motta, M.
[1]
;
Palau, A.
[2]
;
Blamire, M. G.
[2]
;
Johansen, T. H.
[3]
;
Ortiz, W. A.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Cambridge, Dept Mat Sci, Cambridge CB3 0FS - England
[3] Univ Oslo, Dept Phys, NO-0316 Oslo - Norway
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | IEEE Transactions on Applied Superconductivity; v. 25, n. 3 JUN 2015. |
| Web of Science Citations: | 8 |
| Abstract | |
We have observed the occurrence of dendritic flux avalanches in an amorphous film of Mo84Si16. These events are understood to have a thermomagnetic origin and involve the abrupt penetration of bursts of magnetic flux taking place within a limited window of temperatures and magnetic fields. While dc-magnetometry allows one to determine the threshold fields for the occurrence of the thermomagnetic instabilities, magneto-optical imaging reveals the spatial distribution of magnetic flux throughout the sample. Conducting appropriate experiments, typical for this goal, avalanches were confirmed to be a characteristic of this material, ruling out the otherwise admissible possibility of an experimental artifact or a feature related to defects in the film. After the present observation, amorphous MoSi alloys, or a-MoSi, can be included in the gallery of superconducting materials exhibiting flux avalanches when in the form of thin films, a characteristic that must be carefully taken into consideration when one plans to employ films of those materials in applications. (AU) | |
| FAPESP's process: | 07/08072-0 - Fundamental research in superconductivity and magnetism - systems potentially useful for aplications: advanced oxides and superconductors patterned with artificial structures |
| Grantee: | Wilson Aires Ortiz |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/16097-3 - Thermomagnetic instabilities in superconducting films: interaction among flux avalanches and non-superconducting regions created intentionally |
| Grantee: | Fabiano Colauto |
| Support Opportunities: | Regular Research Grants |