Temperature dependence of the activation energy at low magnetic induction in high-Tc superconductors
Z. D. Wang, Z. J. Huang, Y. Y. Xue, P. H. Hor, C. S. Ting, C. W. Chu
DOI 10.1103/PhysRevB.44.2778 · Physical Review B
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Abstract
The activation energy U0 has been measured for melt-textured YBa2Cu3O7 samples at low magnetic induction B∥c. The data indicate that U0 has a nearly linear temperature dependence in a certain temperature regime (≃10–60 K) and is insensitive to magnetic induction. In terms of the collective-pinning ideas and taking into account the modification due to the thermal fluctuation of the flux-line lattice, we propose a possible theoretical explanation. Meanwhile, the critical current Jc, which depends upon the magnetic induction B as Jc∝1/ √B , was obtained.
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 | onset |
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