One-dimensional artificial pinning centers (APCs) were introduced perpendicular to the surface of the c-axis oriented YBa2Cu 3O7-δ (YBCO) films by using Y2O 3 nano-islands which were distributed on the substrates. In-field Jc of the films was remarkably enhanced by this method and reached to 0.12 MA/cm2 (77 K, B∥c, 5 T), which was 2-2.5 times higher than that of a pure YBCO film. The present films had a large Jc peak when the field was applied close to the c-axis. The results indicate that the strong APCs were introduced into the YBCO films. The vortex pinning by the present APCs is discussed based on the accommodation angle of the vortices.
|ジャーナル||Physica C: Superconductivity and its applications|
|出版ステータス||Published - 2005 10月 7|
|イベント||Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity - |
継続期間: 2004 11月 23 → 2004 11月 25
ASJC Scopus subject areas