Title :
Resonant characteristics of high T/sub c/ DC SQUID caused by large dielectric constant of SrTiO/sub 3/
Author :
Enpuku, K. ; Maruo, T. ; Minotani, T.
Author_Institution :
Dept. of Electronic Devices, Kyushu Univ., Fukuoka, Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
Dynamic behavior of a DC SQUID coupled to a resonant circuit is studied with numerical simulation. It is shown that large RF noise flux is caused by the resonant circuit, and is added to the SQUID. This RF flux affects considerably the SQUID characteristics, e.g., appearance of resonant behavior and the increase of noise. It is also shown that a parasitic capacitance between the resonant circuit and the ground of the SQUID changes the SQUID characteristics. Therefore, it is important to suppress the RF noise flux and decrease the parasitic in order to improve the characteristics of the SQUID.
Keywords :
SQUIDs; capacitance; high-temperature superconductors; numerical analysis; permittivity; strontium compounds; superconducting device noise; superconducting device testing; SrTiO/sub 3/; dynamic behavior; ground; high T/sub c/ DC SQUID; large RF noise flux; large dielectric constant; noise increase; numerical simulation; parasitic capacitance; resonant characteristics; resonant circuit; Coils; Dielectric constant; Equivalent circuits; Frequency estimation; Parasitic capacitance; Q factor; RLC circuits; Resonance; SQUIDs; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
