Abstract
Using high Tc superconductor (HTSC) Ei2 Sr2 CaCu2 O8+y, which have intrinsically stacked Josephson junctions (IJJs), we observed periodical oscillations in the flow resistance of JVs against parallel magnetic field to the superconducting layers. We have introduced pancake vortices to control the dynamical motion of JVs, which have a role for pinning of JVs. Applying a time-asymmetric input current with biharmonics, we have observed a reversible rectification effect with changing the phase and the frequency difference in the biharmonics. The output signal is much larger than that using the single JJ. Utilizing a multiple-function of IJJs, new types of the junctions will make the new functional devices of HTSCs possible.
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