Superconducting transport-properties of SmBa2Cu 3Oy (Sm123) films on MgO single crystalline substrates prepared by pulsed laser deposition were investigated. It was found that not only Tc,zero values but also Jc-B properties of the Sm123 films were improved by the BaZrO3 (BZO) buffer layer on MgO substrates. Tc,zero=93.8 K, J c(77K,1T,B∥c)=7.5×105 A/cm2 were obtained for Sm123 films with 0.93 μm thickness. Cross-sectional TEM observations revealed that the Sm123 film grown on the BZO buffer layer has higher crystallinity compared to the Sm123 film without BZO. Thus, improvement of the microstructure for the Sm123 films led to the higher superconducting properties of the Sm123 films. In addition, the effects of the BZO buffer layer on the microstructure and correlation to the superconducting properties of the Sm123 films were explained in view of interfacial energies on the hetero-epitaxial growth.
|ジャーナル||Physica C: Superconductivity and its applications|
|出版ステータス||Published - 2003 10|
|イベント||Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan|
継続期間: 2002 11 11 → 2002 11 13
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