Artículos de revistas
Superconducting properties in heavily overdoped Ba(Fe0.86Co0.14)2As2 single crystals
Fecha
2015-01Registro en:
Kim, Jeehoon; Haberkorn, Nestor Fabian; Gofryk, K.; Graf, M.J.; Ronning, F.; et al.; Superconducting properties in heavily overdoped Ba(Fe0.86Co0.14)2As2 single crystals; Pergamon-Elsevier Science Ltd.; Solid State Communications; 201; 1-2015; 20-24
0038-1098
CONICET Digital
CONICET
Autor
Kim, Jeehoon
Haberkorn, Nestor Fabian
Gofryk, K.
Graf, M.J.
Ronning, F.
Sefat, A.S.
Movshovich, R.
Civale, L.
Resumen
We report the intrinsic superconducting parameters in a heavily overdoped Ba(Fe1-xCox)2As2 (x=0.14) single crystal and their influence in the resulting vortex dynamics. We find a bulk superconducting critical temperature of 9.8 K, magnetic penetration depth λab (0)=660 ± 50 nm, coherence length ξab (0)=6.4 ± 0.2 nm, and the upper critical field anisotropy γT→Tc ≈ 3.7. The vortex phase diagram, in comparison with the optimally doped compound, presents a narrow collective creep regime. The intrinsic pinning energy plays an important role in the resulting vortex dynamics as compared with similar pinning landscape and comparable intrinsic thermal fluctuations.