Effects of dimensional crossover on flux pinning in a model high-Tc superconductor: YBa2Cu3O7−δ/(PrxY1−x)Ba2Cu3O7−δ superlattices
Qi Li, C. Kwon, X. X. Xi, S. Bhattacharya, A. Walkenhorst, T. Venkatesan, S. J. Hagen, W. Jiang, R. L. Greene
DOI 10.1103/PhysRevLett.69.2713 · Physical Review Letters
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Abstract
Superlattices of one-unit-cell-thick YBa2Cu3O7−δ, layers with (PrxY1−x)Ba2Cu3O7−δ were fabricated as a model system to study the effects of magnetic coupling on flux pinning in high-Tc superconductors. The sample can be transformed from an S/S to an S/N structure by increasing the temperature from below to above the Tc of the intercalating (PrxY1−x)Ba2Cu3O7−δ layer. Dramatic changes in the characteristics of the magnetic field and angle dependence of the critical current density, Jc(B,Θ), caused by a 3D to 2D crossover were observed. The result demonstrates the significance of the dimensionality to the flux pinning in these materials with layered structures.
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. | 74 | Pressure not reported | zero_resistance |
| (Pr0.4Y0.6)Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50 | Pressure not reported | zero_resistance |
| (Pr0.1Y0.9)Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81 | Pressure not reported | zero_resistance |
| Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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