Electrical transport properties of high quality Bi-2223 crystal

TL;DR

This study investigates the electrical transport properties of high-quality Bi-2223 crystals, revealing vortex-glass behavior, a shifted melting transition, and insights into the critical current density limitations due to intrinsic pinning.

Contribution

It provides detailed analysis of vortex-glass transition and pinning effects in high-quality Bi-2223 crystals, advancing understanding of their superconducting transport properties.

Findings

Vortex-glass model fits resistance data above Tc.

Melting transition boundary shifted to lower temperatures.

Critical current density limited by intrinsic pinning properties.

Abstract

We have studied electrical transport properties of a high quality Bi2Sr2Ca2Cu3O10+x crystal below a superconducting critical temperature, Tc. In magnetic fields B parallel to the c-axis just above a voltage response onset resistance vs temperature data are well fitted to the vortex-glass model. Obtained from the vortex-glass analysis a melting transition boundary for Bi-2223 crystal shifted towards lower temperatures compared to previously reported data for a (Bi,Pb)-2223 single crystal. The critical current density, Jc, of Bi-2223 crystals is close to presented elsewhere Jc values for Bi-2223 tapes suggesting a principal role of weak intrinsic pinning properties of Bi-2223 as a main limiting factor of Jc of Bi-2223 conductors.