"Measurements of anisotropic transport properties (dc and high-frequency regime) of driven vortex matter in YBa2Cu3O7− x with elongated strong-pinning sites (c-axis aligned, self-assembled BaZrO3 nanorods) are used to demonstrate that the effective-mass angular scaling takes place only in intrinsic physical quantities (flux-flow resistivity), and not in pinning-related Labusch parameter and critical currents. Comparison of the dynamics at different time scales shows evidence for a transition of the vortex matter toward a Mott phase, driven by the presence of nanorods. The strong pinning in dc arises partially from a dynamic effect."
Pompeo, N., A., A., Torokhtii, K., V., G., G., C., Silva, E. (2013). Anisotropy and directional pinning in YBa2Cu3O7−x with BaZrO3 nanorods. APPLIED PHYSICS LETTERS, 103, 022603-1-022603-4 [10.1063/1.4813405].
Anisotropy and directional pinning in YBa2Cu3O7−x with BaZrO3 nanorods
POMPEO, NICOLA;TOROKHTII, KOSTIANTYN;SILVA, Enrico
2013-01-01
Abstract
"Measurements of anisotropic transport properties (dc and high-frequency regime) of driven vortex matter in YBa2Cu3O7− x with elongated strong-pinning sites (c-axis aligned, self-assembled BaZrO3 nanorods) are used to demonstrate that the effective-mass angular scaling takes place only in intrinsic physical quantities (flux-flow resistivity), and not in pinning-related Labusch parameter and critical currents. Comparison of the dynamics at different time scales shows evidence for a transition of the vortex matter toward a Mott phase, driven by the presence of nanorods. The strong pinning in dc arises partially from a dynamic effect."I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
