Second-peak effect in a superconducting (Tl, Bi)-1212 single crystal by ac susceptibility: Evidence for vortex plastic behavior
T. Aouaroun, Ch. Simon
DOI 10.1103/PhysRevB.58.11692 · 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
A second peak effect is observed for a (Tl, Bi)-1212 single crystal using ac susceptibility measurements. The analysis of the frequency dependence of the second peak position shows that plasticity governs the vortex dynamics on both sides of the second peak line. This suggests that no particular change in the vortex dynamics occurs by crossing this line. We propose that this second peak effect is due to the temperature activated form of the characteristic relaxation times and to the fact that the characteristic activation energy Uc and the critical current density Jc have inverse variations with the magnetic field B (when one increases with B the other decreases). We also propose that the time dependence of the second peak field position should indicate the vortex dynamics behavior: an increasing second peak field position with time is a fingerprint of elastic behavior while a decreasing second peak field position with time is a fingerprint of plastic behavior. The latter case agrees well with our experimental results.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (Tl,Bi)-1212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | unknown |
Similar papers
Bulk Superconductivity at 125 K in Tl2Ca2Ba2Cu3Ox
similarity 0.88S. S. P. Parkin et al.
Source status unknown — claims are unverified
Charge transfer and superconductor-metal-insulator transitions in high-Tc superconductors
similarity 0.88J. C. Phillips
Source status unknown — claims are unverified
Pinning-induced transition to disordered vortex phase in layered superconductors
similarity 0.88A. E. Koshelev & V. M. Vinokur
Source status unknown — claims are unverified
Superconducting and calorimetric properties of ThPt2B2C and the anomalous Tc variation for nonmagnetic RPt2B2C systems (R = Y, Th, La)
similarity 0.87F. S. Jeng et al.
Source status unknown — claims are unverified
Dynamic transition in driven vortices across the peak effect in superconductors
similarity 0.87Mahesh Chandran et al.
Source status unknown — claims are unverified
ac strain based thermodynamic criterion for vortex lattice in type-II superconductors
similarity 0.87Peipei Lu et al.
Source status unknown — claims are unverified