Title :
Interaction among superconducting weak links in a bulk sample of YBaCuO at 77 K
Author :
Yang, Tao ; Dong, Lixin ; Sun, ZiQiang ; Chen, XinHang ; Liu, Chunfang ; Li, Jianping ; Wu, Xiaozu ; Zhou, Lian
Author_Institution :
Dept. of Phys., Northwest Univ., Xian, China
fDate :
3/1/1989 12:00:00 AM
Abstract :
The DC and AC Josephson effects have been directly observed for a piece of superconducting material about 5 mm*1 mm*0.2 mm which was cut from a bulk sample of Y/sub 1/Ba/sub 2/Cu/sub 3/. the I-V (current voltage) characteristics were similar to those of a microbridge. When the sample was irradiated by 35.6-GHz microwaves, about 30 Shapiro steps on the I-V curves were observed at 77 K. Microwave-induced steps at both n(hf/2e) and 2n(hf/2e) were coexistent in the sample. It was found that the step width is not always consistent with the Josephson I-V relation. This phenomenon might result from complex interaction among a variety of superconducting links in the bulk sample of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub y/.<>
Keywords :
Josephson effect; barium compounds; high-temperature superconductors; yttrium compounds; 35.6 GHz; 77 K; AC; DC; I-V characteristics; Josephson effects; Shapiro steps; complex interaction; high temperature superconductor; step width; superconducting weak links; Josephson effect; Phased arrays; Powders; Superconducting materials; Superconducting microwave devices; Superconductivity; Tellurium; Temperature; Voltage; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
