Microwave Transmission and Reflection for a Type-II Superconducting Superlattice in the Mixed State

The microwave reflection and transmission for a type-II superconducting superlattice in the mixed state are theoretically calculated based on the vortex dynamical model together with the transfer matrix method in a layered medium. The superlattice is made of alternating layers of high-temperature superconductors and dielectric materials. We analyze the microwave reflection and transmission as functions of the static magnetic field, the number of periods, and the thickness of the dielectric layer. It is shown that the reflection decreases as the static field increases. In addition, the reflection will be enhanced by increasing the number of periods.