A method, using a Corbino disk sample geometry, is described and applied to study of resistive tails of sintered YBCO. When the transport current passes radially from the rim of the disk sample to its center, the two component potential drop signal is detected below Tc, which is due to (i) quasiparticles Wq and (ii) vortex-core-motion related contribution Wϕ. When the contact pairs for W are placed radially, Wq(r) and Wϕ(r) are found to follow the markedly distinctive functional dependences, providing a unique possibility to deconvolute the relative strengths of both contributions. The results obtained suggest that the mixed state dissipation of high-Tc superconductors is strongly influenced by the quasiparticle excitations.
@article{arxiv.cond-mat/9907336,
title = {Using Corbino disk sample geometry to separate quasiparticle and vortex motion contributions to the mixed state dissipation of YBCO},
author = {S. A. Sergeenkov and V. V. Gridin and M. Ausloos},
journal= {arXiv preprint arXiv:cond-mat/9907336},
year = {2015}
}