Comparison of small-field behavior in MgB2, Low- and high-temperature superconductors
Alexey V. Pan, Shi X. Dou
DOI 10.1103/PhysRevB.73.052506 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Different types of superconductors have been investigated at small magnetic fields (Ba) over wide temperature (T) ranges at different Ba orientations. It has been shown that the temperature dependence of the characteristic field (B*), separating the Ba-independent critical current density (Jc) plateau (single vortex pinning regime) and the region with Jc(Ba) (collective pinning), can be attributed either to the temperature dependence of the magnetic penetration depth for Nb-film and MgB2 bulk superconductors, or to thermally activated processes for Bi-based superconductors and YBa2Cu3O7−δ superconducting films. In both cases the vortex pinning influence appears to have a secondary role, affecting the effective vortex depinning radius. An exception in such B*(T) behavior is considered for Nb film when the magnetic field has its considerable component applied perpendicular to the main surface of the film.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| Bi2Sr2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 108 | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.2 | Pressure not reported | unknown |
Similar papers
Structural and superconducting properties of MgB2−xBex
similarity 0.98J. S. Ahn et al.
Source status unknown — claims are unverified
Electrical transport and anisotropic superconducting properties in single crystalline and dense polycrystalline MgB2
similarity 0.97A. K. Pradhan et al.
Source status unknown — claims are unverified
Evidence for Two Superconducting Energy Gaps in MgB2 by Point-Contact Spectroscopy
similarity 0.96P. Szabó et al.
Source status unknown — claims are unverified
Mixed-state properties of superconducting MgB2 single crystals
similarity 0.96M. Zehetmayer et al.
Source status unknown — claims are unverified
Two-Band Superconductivity in MgB2
similarity 0.96M. Iavarone et al.
Source status unknown — claims are unverified
Dependence of the flux-creep activation energy on current density and magnetic field for the MgB2 superconductor
similarity 0.96M. J. Qin et al.
Source status unknown — claims are unverified