Spin-triplet correlations in clean superconductor-ferromagnet multilayers

We study transport phenomena in clean superconductor-ferromagnet (S-F) multilayers for a general case of arbitrary relative orientation of in-plane magnetizations and interface transparencies. The scattering problem based on the Bogoliubov-de Gennes equation is solved, taking into account both spin-singlet and spin-triplet superconducting correlations in two geometries, FSF and SFFS. We find a monotonic dependence of conductance spectra on the angle of misorientation of magnetizations $\alpha $ as their alignment is changed from parallel to antiparallel in FSF. Moreover, the critical Josephson current in SFFS multilayers is also a monotonic function of $\alpha $ when the junction is far enough from 0-$\pi $ transitions. In contrast to the diffusive case, no substantial impact of long--range spin--triplet superconducting correlations neither on conductance nor on the Josephson current has been found in the clean limit.