Abstract
The most anisotropic high temperature superconductors like Bi 2Sr 2CaCu 2O 8 (BSCCO), as well as the recently discovered layered manganite La 1.4Sr 1.6Mn 2O 7 (LSMO) are layered metallic systems where the interlayer current transport occurs via sequential tunneling of charge carriers. As a consequence, in BSCCO adjacent CuO 2 double layers form an intrinsic Josephson tunnel junction while in LSMO tunneling of spin polarized charge carriers between adjacent MnO 2 layers leads to an intrinsic spin valve effect. We present and discuss interlayer transport experiments for both systems. To perform the experiments small sized mesa structures were patterned on top of single crystals of the above materials defining stacks of a small number of intrinsic Josephson junctions and intrinsic spin valves, respectively.
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