Enhancement of critical current density in glycine-doped MgB 2 bulks

Qi Cai, Zongqing Ma, Yongchang Liu*, Liming Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Samples of MgB 2 + x wt% glycine (with x = 0, 2, 5 and 8) were sintered at 800 °C for 30 min. Obvious enhancement of critical current density (J c) over the entire field was obtained in 5 wt% glycine-doped sample, indicating that grain connectivity and pinning effect were both improved. The improvement of J c was attributed to the pinning effect by C substitution, MgO nano-particles, and relatively smaller MgB 2 grains. Besides, 2 wt% glycine could only improve J c at low field, while excessive glycine (above 5 wt%) would lead to unfavorable J c performance.

Original languageEnglish
Pages (from-to)778-782
Number of pages5
JournalMaterials Chemistry and Physics
Volume136
Issue number2-3
DOIs
Publication statusPublished - 15 Oct 2012
Externally publishedYes

Keywords

  • Electron microscopy
  • Sintering
  • Superconductivity
  • Superconductors

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