LaFeAsO₁₋ₓFₓ thin films: high upper critical fields and evidence of weak link behavior
Haindl, S. · Kidszun, M. · Kauffmann, A. · Nenkov, K. · Kozlova, N. · Freudenberger, J. · Thersleff, T. · Haenisch, J. · Werner, J. · Reich, E. · Schultz, L. · Holzapfel, B.
الأصل · EN
High-quality 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, μ₀Hc₂(0) around 77 T and a remarkable steep slope of -7.5 T/K near Tc. From transport measurements we observed a weak link behavior in low magnetic fields and the evidence for a broad reversible regime.
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