Scaling of vortex transport properties and nonlinear ac response of high-temperature superconductors
Department of Physics, Peking University, Beijing 100871, P.R. China
Revised: 30 November 1999
Published online: 15 May 2000
The macroscopic behavior of high-temperature superconductors is described by a nonlinear response function in combinations with Maxwell equations. This function is compatible with the suggested different model pinning barriers U(J). A comparison of this function to the scaling behavior of the isothermal current-voltage characteristics measured in twinned YBa2Cu3O7-8(YBCO) samples shows fair agreement. We also compare the amplitude dependence of ac susceptibility derived from this function with several experimental results of high-temperature superconductors and find a general power law in the out-of-phase x" peak shift.
PACS: 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 74.25.Nf – Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000