New devices of the system of TiO2 sandwiched by Bi-based oxide superconductor

We investigated the behavior of the system of dielectric material sandwiched by the Bi-based oxide superconductor, under microwave irradiation. The dielectrics were TiO2, CaTiO3 and forsterite. For comparison of the superconductor functions, we prepared a sample in which TiO2 was sandwiched by forsterite. The resonance frequency of the system was 6–9 GHz, corresponding to dielectrics and the Q values were 300–400 at room temperature and 2000–5000 in liq.N2. Furthermore, it was found that the three resonance frequencies existed having differences of 0.003 GHz among them.