Dimensional crossover of vortex dynamics induced by Gd substitution on Bi2212 single crystals

Abstract

The vortex dynamics of Bi 2 Sr 2 Ca 1−x Gd x Cu 2 O 8+δ single crystals is investigated by magnetic relaxation and hysteresis measurements. By substituting Ca with Gd, it is found that the interlayer Josephson coupling is weakened and the anisotropy is increased, which leads to the change of vortex dynamics from 3D elastic to 2D plastic vortex creep. Moreover, the second magnetization peak, which can be observed in samples near the optimal doping, is absent in the strongly underdoped ( with 2D vortex ) region.

Effect of Mo substitution on the structural and transport properties of Bi2Sr2Ca2Cu3−xMoxO10+y system

“…This equation successfully applied to the doped/substituted BSCCO system previously by many groups [59][60][61][62][63][64][65]. Calculations for the unsubstituted Bi-2212 system had shown that the p value ranged from 0.16 to 0.22 [58].…”

Synthesis and characterization of Er-substituted Bi-2223 H-Tc glass–ceramic superconductors

“…Recently, this equation was successfully applied to the doped/substituted Bi-based superconducting system [56][57][58][59][60]. Previous calculations for the unsubstituted Bi-2223 material had shown that the P-value ranged from 0.116 to 0.16.…”

The thermoelectric properties of Bi-2223 superconductors sintered at different conditions

“…This formula is found to be applicable to several doped cuprate superconductors [19,[35][36][37][38][39][40][41][42]. The T max c value is taken from the experimental data, and using this relation, p values for all samples have been calculated; they are given in table 1.…”