Vortex glass scaling in Pb-doped Bi2223 single crystal

TL;DR

This study investigates the vortex-liquid behavior and vortex-glass transition in Pb-doped Bi-2223 single crystals through resistivity measurements, revealing Arrhenius and power-law behaviors and establishing a magnetic phase diagram.

Contribution

It provides new insights into vortex-glass scaling and critical exponents in Pb-doped Bi-2223 superconductors, expanding understanding of vortex dynamics in this material.

Findings

Arrhenius-like resistivity behavior below Tc

Power-law dependence near vortex-glass transition

Field-independent critical exponents nu(z-1)=4.6±0.5

Abstract

We report on study of the vortex liquid in Pb-doped Bi-2223 single crystal using the in-plane resistivity measurements as a function of temperature and magnetic field up to 6T applied perpendicular to CuO planes. Below Tc at the upper part of superconducting transition we found Arrhenius-like resistivity behavior. With further temperature decrease close to resistivity onset resistivity shows power law dependence on temperature signaling approaching vortex-glass transition. The critical exponents nu(z-1)=4.6 plus-minus 0.5 are found to be field independent within experimental errors. We also present magnetic phase diagram defining region of nonzero critical current for Pb-doped Bi-2223 single crystal.