Using Corbino disk sample geometry to separate quasiparticle and vortex motion contributions to the mixed state dissipation of YBCO

S. A. Sergeenkov; V. V. Gridin; M. Ausloos

doi:10.1007/s002570050247

paper

Using Corbino disk sample geometry to separate quasiparticle and vortex motion contributions to the mixed state dissipation of YBCO

arXiv:cond-mat/9907336 · doi:10.1007/s002570050247

Abstract

A method, using a Corbino disk sample geometry, is described and applied to study of resistive tails of sintered $Y B C O$ . 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 $T_{c}$ , which is due to (i) quasiparticles $W_{q}$ and (ii) vortex-core-motion related contribution $W_{ϕ}$ . When the contact pairs for $W$ are placed radially, $W_{q} (r)$ and $W_{ϕ} (r)$ 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- $T_{c}$ superconductors is strongly influenced by the quasiparticle excitations.

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Using Corbino disk sample geometry to separate quasiparticle and vortex motion contributions to the mixed state dissipation of YBCO

Abstract

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