Vortex pinning by twin boundaries in copper oxide superconductors
- 1 April 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 43 (10), 7826-7830
- https://doi.org/10.1103/physrevb.43.7826
Abstract
We investigate the pinning properties of twin boundaries in single crystals within a collective-pinning theory. For small angles ϑ between the magnetic field and the twin boundaries, the vortex lattice adjusts to the array of twinning planes. Above the bulk depinning temperature , the pinning properties of the twin boundaries are enhanced as compared with the bulk pinning. The combined effects lead to an increased pinning of the vortex lattice at small angles ϑ, explaining the narrow angular response observed recently in the resistive transition and in torque measurements.
Keywords
This publication has 15 references indexed in Scilit:
- Hydrodynamics of flux liquidsPhysical Review B, 1990
- Thermal fluctuations of vortex lines, pinning, and creep in high-superconductorsPhysical Review B, 1990
- Direct observation of dissipative flux motion and pinning by twin boundaries in YBa_{2}Cu_{3}O_{7-δ} single crystalsPhysical Review Letters, 1990
- Direct evidence for an effect of twin boundaries on flux pinning in single-crystalPhysical Review Letters, 1990
- Theory of collective flux creepPhysical Review Letters, 1989
- Vortex Structure in Y and Evidence for Intrinsic PinningPhysical Review Letters, 1989
- Critical current densities and the effects of thermally assisted flux flow in single crystals of Bi2Sr2CaCu2O8Superconductor Science and Technology, 1989
- Dynamics of interfaces and dislocations in disordered mediaJournal of Physics C: Solid State Physics, 1987
- Origin of superconductive glassy state and extrinsic critical currents in high-oxidesPhysical Review Letters, 1987
- Lower critical field of an anisotropic type-II superconductorPhysical Review B, 1980