RESONANT CHARACTERISTICS OF HIGH T-C DC SQUID CAUSED BY LARGE DIELECTRIC-CONSTANT OF SRTIO3

Dynamic behavior of de SQUID coupled to resonant circuit is studied wi th numerical simulation. It is shown that large rf noise flux is cause d by the resonant circuit, and is added to the SQUID, This rf flux aff ects considerably the SQUID characteristics, e.g., appearance of reson ant behavior and the increase of noise. It is also shown that a parasi tic capacitance between the resonant circuit and the ground of the SQU ID changes the SQUID characteristics. Therefore, it is important to su ppress the rf noise flux and decrease the parasitic capacitance in ord er to improve the characteristics of the coupled SQUID.