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High upper critical fields and evidence of weak-link behavior in superconducting LaFeAsO1-xFx thin films
- Source :
- Physical review letters. 104(7)
- Publication Year :
- 2009
-
Abstract
- Superconducting LaFeAsO1-xFx thin films were grown on single crystalline LaAlO3 substrates with critical temperatures (onset) up to 28 K. Resistive measurements in high magnetic fields up to 40 T reveal a paramagnetically limited upper critical field mu{0}H{c2}(0) around 77 T and a remarkable steep slope of -6.2 T K-1 near T{c}. From transport measurements we observed weak-link behavior in low magnetic fields and evidence for a broad reversible regime.
Details
- ISSN :
- 10797114
- Volume :
- 104
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.pmid..........19032fc1a7baa45448fee1b01b36daf8