Influence of point defects on the vortex state of disordered superconductors

A. K. Pradhan, M. Muralidhar, Y. Feng, M. Murakami, K. Nakao, N. Koshizuka

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We report on a strongly pinned entangled vortex liquid state in the presence of random point disorders in complex ternary (Nd-Eu-Gd)Ba2Cu3O7-δ twinned single-domain melt-textured samples. The in-plane and out-of-plane resistance measurements show that vortex lines are correlated along the c axis with finite vortex correlation length in the pinned liquid state. This is due to the correlated pinning promoted by the twin boundary. The vortex correlation length can be quenched by increasing the defect density by introducing more second-phase precipitates or oxygen defects favoring an entangled vortex liquid state depending on the defect density.

Original languageEnglish
Article number172505
Pages (from-to)1725051-1725054
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number17
Publication statusPublished - 2001 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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