Tunable Flux-Matching Effects in High-Tc Superconductors with Nonuniform Pinning Arrays
J. Trastoy, C. Ulysse, R. Bernard, M. Malnou, N. Bergeal, J. Lesueur, J. Briatico, Javier E. Villegas
DOI 10.1103/PhysRevApplied.4.054003 · Physical Review Applied
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Abstract
We experimentally study superconducting YBa2Cu3O7 thin films with artificial vortex pinning arrays created via masked ion irradiation. In particular, we compare a series of arrays (2D periodic non-Bravais lattices) in which the density of pinning sites is nonuniform within the unit cell. The series consists of variants of a canonical array, which is gradually deformed by varying the separation between pinning centers within the unit cell. Interestingly, the array deformation produces a very striking evolution of magnetoresistance flux-matching effects, which strongly depend on temperature. The key to this unusual behavior is the nanoscale spatial modulation of the superconducting critical temperature produced via masked ion irradiation. The hereby-demonstrated tunability of the flux-matching effects brings possibilities to the field of vortex manipulation in high-temperature superconductors.
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. | 86 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 73.6 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87.5 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 68.5 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75.5 | Pressure not reported | zero_resistance |
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