Top-seeded infiltration growth of (Y, Gd)Ba2Cu3Oy bulk superconductors with high critical current densities

Dhruba Das, Muralidhar Miryala, M. S.Ramachandra Rao, Masato Murakami

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We employed the top-seeded infiltration-growth (IG) process for the fabrication of bulk (Y, Gd)Ba2Cu3Oy (YG-123) superconductors by varying the composition of (Y, Gd)2BaCuO5 (YG-211) and compared with bulk YBa2Cu3Oy (Y-123) superconductors grown under similar conditions. IG-processed YG-123 exhibited Jc (77 K) of 4.78 × 104 A cm-2 in zero field, which was higher than the value of 3.71 × 104 A cm-2 for Y-123. The superconducting transition temperature (Tc) of YG-123 increased with increasing Gd content. However, there was spatial variation in the superconducting properties of IG-processed YG-123 samples due to the inhomogeneous distribution of YG-211. Jc values of YG-123 decreased when increasing the distance from the seed both along the a and c-axis directions. The scaling studies of the pinning behavior for YG-123 showed that non-superconducting YG-211 particles act as effective pinning centers, supported by the fact that δTc type pinning is active in the system.

Original languageEnglish
Article number105015
JournalSuperconductor Science and Technology
Volume30
Issue number10
DOIs
Publication statusPublished - 2017 Sep 15

Keywords

  • critical current density
  • microstructure
  • pinning
  • top-seeded infiltration growth
  • transition temperature
  • volume fraction

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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