抄録
High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 675-678 |
| ページ数 | 4 |
| ジャーナル | Superconductor Science and Technology |
| 巻 | 15 |
| 号 | 5 |
| DOI | |
| 出版ステータス | Published - 2002 5月 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- セラミックおよび複合材料
- 凝縮系物理学
- 金属および合金
- 電子工学および電気工学
- 材料化学