ab-plane restrained flux motion of (110) YBa2Cu3O7−δ thin-film superconductors
J. Z. Qu, Q. Y. Chen, W. N. Kang, W. K. Chu
DOI 10.1103/PhysRevB.60.10484 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We have studied thermally activated flux movements in between the ab planes of YBa2Cu3O7−δ (110)-oriented films. The activation energy was found to scale as Ue∝[1+kln(Jth/J)](1−T/Tc)βH−α, with α∼1 and β∼2, which is different from previous reports on the c-oriented thin films or single crystals, with α∼1 and β∼1.5, where k is a constant and Jth is a threshold current density. This behavior implies that for films with c axis in-plane aligned to the substrate surface, flux movements are confined in between the ab planes. Such movements are opposed by an energy barrier generally higher than that for in-plane gliding, but lower than that of a cross-plane movement. At low field and current density, the flux dynamics is mostly three-dimensional (3D)-like. At high field and current density, however, the tendency of a 3D to 2D transition was observed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.8 | Pressure not reported | midpoint |
Similar papers
Two-stage crossover from thermal to quantum flux creep of dilute vortex ensembles in various high-Tc superconducting thin films
similarity 0.96Johan J. Åkerman et al.
Source status unknown — claims are unverified
Analytical approach to the thermal instability of superconducting films under high current densities
similarity 0.96Jesús Maza et al.
Source status unknown — claims are unverified
Heteroepitaxial growth of strained multilayer superconducting thin films of Nd1.83Ce0.17CuOx/YBa2Cu3O7−δ
similarity 0.96A. Gupta et al.
Source status unknown — claims are unverified
Interface barriers for flux motion in high-temperature superconducting superlattices
similarity 0.96J. E. Villegas et al.
Source status unknown — claims are unverified
Spin-polarized neutron reflectivity: A probe of vortices in thin-film superconductors
similarity 0.96S.-W. Han et al.
Source status unknown — claims are unverified
Strong field-matching effects in superconducting YBa2Cu3O7−δ films with vortex energy landscapes engineered via masked ion irradiation
similarity 0.96I. Swiecicki et al.
Source status unknown — claims are unverified