Observation of critical scaling behavior in the ac impedance at the onset of superconductivity in a large magnetic field
H. K. Olsson, R. H. Koch, W. Eidelloth, R. P. Robertazzi
DOI 10.1103/PhysRevLett.66.2661 · Physical Review Letters
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
We have measured the ac impedance of Y-Ba-Cu-O thin films in a magnetic field of 0.55 T and in the frequency range from 100 kHz to 500 MHz. At the temperature of the dc vortex-glass transition but in the ac linear regime, we find scaling behavior of the impedance amplitude, ‖Z‖∞ω0.83, and a frequency-independent phase φ=74°. At higher temperatures, we find a crossover from a frequency-independent to a frequency-dependent impedance. This crossover frequency Ω varies with temperature like Ω∼(T-Tg)5,8. Within experimental error, all of these results are in excellent agreement with predictions for the ac impedance of the vortex-glass phase of a superconductor in a large magnetic field.
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. | 86.1 | Pressure not reported | onset |
Similar papers
Scaling behavior of fluctuation conductivity of high-temperature superconductors in a magnetic field
similarity 0.96D. H. Kim et al.
Source status unknown — claims are unverified
Magnetoresistance and the effect of superconducting fluctuationsin YBa2Cu3O7/PrBa2Cu3O7 superlattices
similarity 0.96W. Volz et al.
Source status unknown — claims are unverified
Reduction of the magnetization decay rate in high-Tc superconductors
similarity 0.96B. M. Lairson et al.
Source status unknown — claims are unverified
Giant Magnetoresistance in Ferromagnet/Superconductor Superlattices
similarity 0.96V. Peña et al.
Source status unknown — claims are unverified
Self-heating effects on the transition to a highly dissipative state at high current density in superconducting YBa2Cu3O7−δ thin films
similarity 0.96J. Viña et al.
Source status unknown — claims are unverified
Dynamic scaling and two-dimensional high-Tc superconductors
similarity 0.95D. R. Strachan et al.
Source status unknown — claims are unverified