Title :
Josephson junction and DC SQUID made from superconducting Y-Ba-Cu-O thick film
Author :
Lin, A.Z. ; Li, H.Q. ; Tang, L. ; Liu, F.W.
Author_Institution :
Gen. Res. Inst. of Non-Ferrous Metals, Beijing, China
fDate :
3/1/1989 12:00:00 AM
Abstract :
YBa2Cu3O7-x thick films were fabricated by the method of screen printing. A zero-resistance state was achieved at 90 K. The highest critical current density was about 150 A/cm2 at 77 K. A bridge-type Josephson junction and DC SQUID (superconducting quantum interference device) were fabricated from thick films and operated at 77 K. The induced steps produced by the AC Josephson effect were observed on the I-V (current voltage) curve when microwave radiation was applied to the junction. The clear periodic patterns of a DC SQUID are observable at 77 K. Environmental protection and the stability of thick films and devices are discussed
Keywords :
Josephson effect; SQUIDs; barium compounds; critical current density (superconductivity); high-temperature superconductors; thick films; yttrium compounds; AC Josephson effect; DC SQUID; I-V characteristics; Josephson junction; YBa2Cu3O7-x thick films; critical current density; environmental protection; high-temperature superconductor; induced steps; microwave radiation; periodic patterns; screen printing; stability; zero-resistance state; Critical current density; Interference; Josephson junctions; Printing; SQUIDs; Superconducting devices; Superconducting films; Superconducting microwave devices; Thick films; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
