物理学报2016，Vol.65Issue(9)：097401-0-097401-7,8.DOI:10.7498/aps.65.097401
插入二氧化铈薄膜提高MOD-YBa2Cu3O7-x厚膜超导性能的研究∗
Enhanced sup erconducting prop erties in MOD-YBCO thick films with CeO2 interlayer
摘要
Abstract
In YBa2Cu3O7−x (YBCO) film there exists “thickness effect”: the critical current density of YBCO film drops precipitously as the coating thickness increases, especially in the case that the thickness of YBCO film exceeds 1 µm. In this paper, we introduce very thin layers of CeO2 into YBCO layers and successfully fabricate the structure of YBCO/YBCO/CeO2/YBCO superconducting thick film. Firstly, YBCO films with two layers are fabricated on a LaAlO3 substrate by a multiple coatings process using a trifluoroacetate metal organic deposition method. Secondly, CeO2 thin films are deposited on YBCO films by RF-sputtering. Finally, we prepare the third YBCO film on CeO2interlayer. No cracks are observed in scanning electron microscopy images of these films;further, the majority of the grains in the films are well-textured and c-axis oriented. The full-width-half-maximum of the out-of-plane texture is measured to be 1.395◦for the multilayer YBCO film at a thickness of 2 µm Using this multilayer technology, we achieve Jc values of up to 1.36 MA/cm2 (77 K, self-field) in films as thick as 2 µm, for an extrapolated critical current of 272 A/cm. We attribute the enhanced performance of the thick YBCO film to the CeO2 interlayer which playsan important role in transmission texture and stress relaxation.关键词
钇钡铜氧/二氧化铈插层/厚膜Key words
YBa2Cu3O7-x/CeO2 interlayer/thick film引用本文复制引用
丁发柱,古宏伟,王洪艳,屈飞,商红静,张慧亮,董泽斌,张贺,周微微..插入二氧化铈薄膜提高MOD-YBa2Cu3O7-x厚膜超导性能的研究∗[J].物理学报,2016,65(9):097401-0-097401-7,8.基金项目
国家高技术研究发展计划(批准号:2014AA032702)、国家自然科学基金(批准号:51577180,51272250)和北京市自然科学基金面上项目(批准号:2152035)资助的课题 （批准号:2014AA032702）
