Dai H, Yoon S, Liu J, Budhani R C, Lieber C M
Science. 1994 Sep 9;265(5178):1552-5. doi: 10.1126/science.265.5178.1552.
Columnar defects generated by heavy-ion irradiation are promising structures for pinning magnetic flux lines and enhancing critical currents in superconductors with high transition temperatures. An approach that combines chemical etching and magnetic decoration was used to highlight simultaneously the distributions of columnar defects and magnetic flux lines in Bi(2)Sr(2)CaCu(2)O(8) superconductors. Analyses of images of the columnar defects and flux-line positions provide insight into flux-line pinning by elucidating (i) the occupancy of columnar defects by flux lines, (ii) the nature of topological defects in the flux-line lattice, and (iii) the translational and orientational order in this lattice.
重离子辐照产生的柱状缺陷是一种很有前景的结构，可用于钉扎磁通线并提高高温超导体的临界电流。一种结合化学蚀刻和磁装饰的方法被用于同时突出Bi(2)Sr(2)CaCu(2)O(8)超导体中柱状缺陷和磁通线的分布。通过分析柱状缺陷和磁通线位置的图像，通过阐明（i）磁通线对柱状缺陷的占据情况、（ii）磁通线晶格中拓扑缺陷的性质以及（iii）该晶格中的平移和取向有序性，深入了解磁通线钉扎。
