Effect of growth temperature on superconducting properties of YBa 2Cu3Oy bulk superconductors grown by seeded infiltration

K. Nakazato, M. Muralidhar, N. Koshizuka, K. Inoue, M. Murakami

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We investigated the effect of growth temperature on the characteristics of YBa2Cu3Oy (Y-123) bulk superconductor prepared by seeded infiltration process. Homemade Y2BaCuO5 "Y-211" particles and liquid phase of Ba3Cu 5O8 were used to produce Y-123 bulks in air such that the liquid phase infiltrates into a Y-211 block. Y-123 samples of 20 mm diameter and 8 mm thickness were produced at different growth temperatures, i.e., 990, 985, 983, 980 and 978 °C with the same holding time of 25 h. We found that single grain growth without multi-nucleation occurred at 980 °C. Further, magnetization measurements indicated a sharp superconducting transition with Tc (onset) around 93.2 K. Trapped field measurements showed that the samples are single domain, and the sample 27 mm in diameter and 5 mm in thickness showed the maximum trapped field of around 0.45 T on the sample surface at 77 K. The critical current density (Jc) at 77 K and zero field was determined to be 175 kA/cm2, which is the highest value ever reported in the literature.

Original languageEnglish
Pages (from-to)4-7
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume504
DOIs
Publication statusPublished - 2014 Sep 15

Keywords

  • IG process
  • Trapped field measurements

ASJC Scopus subject areas

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

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