Microwave properties of large YBCO films on As-prepared and annealed MgO substrates

被引：5
作者：
Lee, JH [1 ]
Lim, J
Moon, SH
Yun, JH
Choi, YH
Oh, B
Lee, SY
机构：
[1] Konkuk Univ, Dept Phys, Seoul 143701, South Korea
[2] Seoul Natl Univ, Seoul, South Korea
[3] LG Elect Inst Technol, Seoul 137724, South Korea
[4] Natl Inst Stand & Technol, Boulder, CO 80305 USA
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2003年 / 13卷 / 02期
关键词：
annealing; homogeneity; MgO substrate; microwave properties; YBCO films;
D O I：
10.1109/TASC.2003.812029
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We have studied the microwave surface impedance of large YBCO fllms on as-prepared MgO substrates and on annealed MgO substrates with 50 mm in diameter. YBCO films were prepared by pulsed laser deposition. The surface resistance (R-S), homogeneity in the R-S, and structural properties of YBCO on annealed MgO appeared improved compared with those of YBCO on as-prepared MgO. The reduced R-S of YBCO films on annealed MgO is attributed to improved in-plane orientation of the YBCO grains in the films with local variations in the in-plane orientation of YBCO grains correlated well with the R-S for both YBCO films prepared MgO and those on annealed MgO.
引用
收藏
页码：2875 / 2878
页数：4
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