人工晶体学报2009，Vol.38Issue(5)：1146-1153,8.
CeO_2缓冲层热处理对Tl-2212薄膜超导特性的影响
Effects of Heating Treatments of CeO_2 Buffer Layers on Superconducting Properties of Tl-2212 Films
摘要
Abstract
The effect of high temperature treatment on the surface morphology,the phase structure of CeO_2 buffer layers grown on sapphire substrates was studied, and also the growth of CeO_2 on Tl-2212 films. The measurements of AFM and XRD showed that annealing of the CeO_2 films produced drastic change in surface morphology and crystalline quality. Annealing treatment at 950 ℃ for 1 h resulted in atomically flat CeO_2 surface and significant improvement of the crystalline quality of CeO_2 films. Experimental results revealed that the superconductivity of Tl-2212 films is closely interconnected with the crystal quality and morphology of buffer layers. The crack-free films with the thickness of 500 nm grown on such buffer layers had a high transition temperature (T_c =107 K), a high critical current density (J_c=3.9 MA/cm~2 at 77 K and zero applied magnetic field) and a low surface resistance (R_s=281 μΩ at 10 GHz and 77 K).关键词
Tl-2212超导薄膜/缓冲层/AFMKey words
Tl-2212 superconducting thin film/ buffer layer/ AFM分类
数理科学引用本文复制引用
谢清连,方兰,阎少林,游峰,黄国华,李建映,左涛,何明,季鲁,张玉婷,赵新杰..CeO_2缓冲层热处理对Tl-2212薄膜超导特性的影响[J].人工晶体学报,2009,38(5):1146-1153,8.基金项目
国家重点基础研究发展计划(973)项目(No.2006CB601006) （973）
国家高技术研究发展计划(863)(No.2006AA03Z213) （863）
广西高校优秀人才资助计划项目(No.RC2007024) （No.RC2007024）
