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High temperature operation of YBa sub 2 Cu sub 3 O sub 7 minus x dc SQUID

Conference · · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
OSTI ID:6089035
; ; ;  [1]; ;  [2]
  1. Dept. of Electronics, Nagaoka Univ. of Technology (JP)
  2. Institute for Materials Research, Tohoku Univ. (JP)
In this paper using the YBa{sub x}Cu{sub 3}O{sub 7{minus}x} thin film deposited by MOCVD, the authors fabricate the dc SQUID operated at 77 K. The SQUIDs with microbridges are patterned by chemical and laser etching process. These SQUIDS operate stably without hysteresis in quite a wide range of temperature, within several periods of {phi}{sub 0}. At 4.2 K the voltage modulation of 80{mu}V and the intrinsic energy sensitibity of 4.9 {times} 10{sup {minus}31}J/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 {times}10{sub {minus}4}{phi}{sub 0}/square root Hz at 10 Hz.
OSTI ID:
6089035
Report Number(s):
CONF-900944--
Conference Information:
Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
Country of Publication:
United States
Language:
English