Experimental study of scaling laws for the complex susceptibility of type-II superconductors
O. F. de Lima, C. A. Cardoso
DOI 10.1103/PhysRevB.61.11722 · 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
Measurements of the nonlinear complex susceptibility χ, taken as a function of amplitude h and frequency ν of the ac field, can collapse into a single universal curve if they are plotted against the scaling variable hJ(νref)/J(ν), where J is a shielding current density and νref is an arbitrary reference frequency. In this work we present χ(h,ν) data for a large range of amplitudes and frequencies, measured in two Nb samples (one single crystal and one polycrystal) and one melt-textured YBa2Cu3O7−δ sample. The predicted scaling relation is verified for several sets of data taken at different temperatures below Tc and applied magnetic fields well above the first critical field Hc1. Data taken closer to Tc revealed a useful scaling applied directly to the critical current density, evaluated from the peak positions of the imaginary component χ″. The occurrence of different regimes of collective vortex creep is also discussed for the YBa2Cu3O7−δ sample.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.8 | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.25 | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.39 | Pressure not reported | unknown |
Similar papers
High-field scaling behavior of thermodynamic and transport quantities of YBa2Cu3O7−δ near the superconducting transition
similarity 0.98U. Welp et al.
Source status unknown — claims are unverified
Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data: Application to high-temperature superconductors
similarity 0.97I. L. Landau & H. R. Ott
Source status unknown — claims are unverified
Implications of crystal-field and intra-atomic interactions for the electronic structure of high-Tc superconductors
similarity 0.96Frank J. Adrian
Source status unknown — claims are unverified
Correlation between oxygen isotope effects on transition temperature and magnetic penetration depth in high-temperature superconductors close to optimal doping
similarity 0.96R. Khasanov et al.
Source status unknown — claims are unverified
Measurements of fluctuation-induced diamagnetism above the superconducting transition in YBa2Cu3O7−δ single crystals in low magnetic fields: Comparison with paraconductivity
similarity 0.96C. Torrón et al.
Source status unknown — claims are unverified
Synthesis and superconducting critical temperature of YBa2Cu3O7−δ18
similarity 0.96E. Garcia et al.
Source status unknown — claims are unverified