Interface barriers for flux motion in high-temperature superconducting superlattices
J. E. Villegas, Z. Sefrioui, M. Varela, E. M. Gonzalez, J. Santamaria, J. L. Vicent
DOI 10.1103/PhysRevB.69.134505 · Physical Review B
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Abstract
We study angular dependent magnetoresistance in the vortex-liquid phase of epitaxial YBa2Cu3O7 thin films and YBa2Cu3O7/PrBa2Cu3O7 superlattices. Superlattices were grown with different PrBa2Cu3O7 thickness in order to tune coupling between YBa2Cu3O7 layers. While dissipation of single film and coupled superlattices is scaled with the anisotropic three-dimensional model in the whole angular range, decoupling through PrBa2Cu3O7 spacer breaks down the scaling and yields strong reduction of the dissipation when the magnetic fields are applied up to ±20° around the interface direction. Bean-Livingston barriers at the interface are the mechanism which governs this behavior.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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