YBa2Cu3O7-δ thin films with low surface resistance prepared by self-template sputtering method

被引：5

作者：

Xu, J ^{[1
]}

Li, YR ^{[1
]}

Tao, BW ^{[1
]}

Liu, XZ ^{[1
]}

Wang, HL ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Inst Informat Mat & Engn, Chengdu 610054, Peoples R China

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2000年 / 331卷 / 01期

关键词：

high-temperature superconductor; thin film; YBaCuO;

D O I：

10.1016/S0921-4534(99)00625-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Highly c-axis-oriented epitaxial YBa2Cu3O7 - delta (YBCO) thin films prepared on LaAlO3 substrates by a self-template technique have been investigated for microwave applications. By varying the conditions of the two-step self-template method, the properties of YBCO thin films could be improved significantly. With this method, it was easy to reproducibly obtain YBCO thin films with T-c0 greater than or equal to 90 K, Delta T-c less than or equal to 1 K, R-s (77 K, 10 GHz) similar to 500 mu Omega. The best sample grown under optimal conditions had a low R-s of 330 mu Omega at 77 K and 10 GHz. In addition, the correlation between the microwave surface resistance, R-s, and the crystal structure is discussed by studying che electron channeling pattern (ECP) of thin films. In conclusion, the microwave losses can strongly be affected by structural imperfections. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：67 / 72

页数：6

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