纳米级衬底表面粗糙度增强YBa2Cu3O7-d薄膜的磁通钉扎
超导电性
2009-11-11 v1 材料科学
摘要
研究表明，纳米级衬底表面粗糙度强烈影响在晶体LaAlO3衬底上通过脉冲激光沉积制备的YBCO薄膜的临界电流密度Jc，该衬底包含两个分离的无孪晶和富孪晶区域。纳米级波纹表面在沉积过程中在富孪晶区域形成。利用磁光成像技术结合光学和原子力显微镜，我们观察到富孪晶区域YBCO薄膜中磁通钉扎增强，导致Jc增加约30%，这通过直接输运测量得到了明确证实。
引用
@article{arxiv.cond-mat/0508537,
title = {Enhanced flux pinning in YBa2Cu3O7-d films by nano-scaled substrate surface roughness},
author = {Zuxin Ye and W. D. Si and Qiang Li and Y. Hu and P. D. Johnson and Y. Zhu},
journal= {arXiv preprint arXiv:cond-mat/0508537},
year = {2009}
}
备注
16 pages, 3 figures, accepted by Applied Physics Letters