We show that a nonhomogeneous magnetic ordering change drastically the physical properties of superconductor- ferromagnet (S/F) systems. Fn the first part we study a Josephson junction consisting of two S/F bilayers separated by an insulating film. We show that if the magnetizations of the two F layers are in an antiparallel configuration the critical current increases with increasing exchange field h. In the second part we show that the presence of a domain wall may induce a triplet component of the superconducting condensate in the ferromagnet. This component may change drastically the physical properties of the system.
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