Applicability of high-Tc paradigms to magnetic relaxation and irreversibility in superconducting Nb
Matthew F. Schmidt, N. E. Israeloff, A. M. Goldman
DOI 10.1103/PhysRevB.48.3404 · Physical Review B
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Abstract
Detailed measurements of the temperature and magnetic-field dependence of the magnetization and the magnetic relaxation of Nb films have been carried out. An irreversibility line, below which the remanent magnetization decayed logarithmically in time, was identified. The data were quantitatively compared to predictions of flux-creep, vortex-glass, and vortex-lattice-melting models. Only the melting model self-consistently explained the data.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.2 | Pressure not reported | onset |
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