Electron scattering dependence of dendritic magnetic instability in superconducting MgB 2 films

Z. X. Ye, Qiang Li, Y. F. Hu, A. V. Pogrebnyakov, Y. Cui, X. X. Xi, J. M. Redwing, Qi Li

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Magnetic instability in both ultrapure and carbon-doped MgB 2 films is investigated by magneto-optical imaging, transport, and bulk magnetization measurements. In the carbon-doped MgB 2 thin films, familiar dendritic flux-jump patterns were observed at low temperature as reported in previous experiments. In the ultrapure MgB 2 thin film, however, a remarkably stable flux penetration was observed, clearly showing the classic behavior of the critical state model. Such different behavior indicates that the electron scattering ultimately controls the magnetic stability of the MgB 2 films.

Original languageEnglish (US)
Article number3
Pages (from-to)5284-5286
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number22
DOIs
StatePublished - Nov 29 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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