Title :
High temperature operation of YBa2Cu3O7-x DC SQUID
Author :
Irie, A. ; Sasahara, H. ; Yamashita, T. ; Kurosawa, H. ; Yamane, H. ; Hirai, T.
Author_Institution :
Dept. of Electron., Nagaoka Univ. of Technol., Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
Using a YBa2Cu3O7-x thin film deposited by MOCVD, a DC SQUID which is operated at 77 K has been fabricated. The SQUIDs with microbridges are patterned by chemical and laser etching processes. The SQUIDs operate stably without hysteresis in quite a wide range of temperature, within several periods of Φ0 . At 4.2 K, the voltage modulation of 80 μV and the intrinsic energy sensibility of 4.0×10-31J/Hz were obtained for the SQUID with an inductance of 70 pH. The flux noise of the SQUID operating at 77 K in FLL mode was 1.8×10-4Φ0 /√Hz at 10 Hz
Keywords :
CVD coatings; SQUIDs; barium compounds; etching; high-temperature superconductors; yttrium compounds; 77 K; 80 muV; DC SQUID; FLL mode; MOCVD; YBa2Cu3O7-x; chemical etching; flux noise; high temperature superconductors; inductance; intrinsic energy sensibility; laser etching; microbridges; voltage modulation; Chemical lasers; Chemical processes; Etching; Hysteresis; MOCVD; SQUIDs; Sputtering; Temperature distribution; Temperature sensors; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
