抄録
Superconducting critical current density (J c) at 4.2 K for superconducting Sr2VFeAsO3-δ tape fabricated by powder-in-tube process was enhanced up to 285 A cm-2. Cross-sectional SEM images for superconducting Sr2VFeAsO3-δ wire/tapes indicated that void fraction f void was reduced from 12.8% for the round wire to ∼2.5% for the tapes. The decrease in f void suppresses the so-called "weak-links" and therefore enhances the J c. In order to enhance J c, the annealing condition should be optimized. The optimal annealing condition enforces the link between grains and avoids the loss of oxygen atoms in the superconducting core.
本文言語 | English |
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論文番号 | 123004 |
ジャーナル | Applied Physics Express |
巻 | 12 |
号 | 12 |
DOI | |
出版ステータス | Published - 2019 12月 1 |
ASJC Scopus subject areas
- 工学(全般)
- 物理学および天文学(全般)