Magnetic dimensional crossover in Pr-doped single crystal Bi2Sr2Ca0.89Pr0.11Cu 2O8+δ

H. C. Ku, C. Y. Lin, Y. Y. Hsu, X. G. Li, X. F. Sun

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Magnetic hysteresis measurements on Pr-doped single crystal Bi2Sr2Ca0.89Pr0.11Cu 2O8+δ show a dimensional crossover from the three-dimensional (3D) vortex glass to the two-dimensional (2D) pancake of vortices. The observed crossover field H2D for field applied parallel to the c-axis decreases from 6 kG at 5 K to 410 G at 25 K and 120 G at 45 K. The substitution of 11% of magnetic Pr3- ions for Ca2- ions effectively decreases the hole concentration on the CuO2 bi-layers but pushes the superconducting state from the overdoped region to the optimum composition with a superconducting transition temperature Tc. of 88 K. The lower crossover field H2D values of the Pr-doped sample as compared with the undoped Bi2Sr2CaCu2O8+δ imply that the Josephson coupling between the two superconducting regions of adjacent CuO2 bi-layers can be reduced by the presence of Pr.

Original languageEnglish
Pages (from-to)550-551
Number of pages2
JournalPhysica B: Condensed Matter
Volume259-261
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Dimensional crossover
  • Flux dynamics
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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