  We study the influence of misalignment of the ferromagnetic exchange field on
the equilibrium properties of hybrid structures, composed of superconducting
(S) and ferromagnetic (F) parts. In particular, we study numerically the
superconducting critical temperature Tc in F-S-F trilayers and in F-S-F-S-F
Josephson junctions as a function of the misalignment angle theta of the
ferromagnetic magnetization. We discuss the corresponding phase diagrams for
these hybrid structures. For the Josephson junctions, a transition between the
zero-phase and the pi-phase ground state as a function of theta takes place
under certain conditions. Within the quasiclassical Green's function technique
in the diffusive limit, we introduce a fast and effective method for
calculating Tc in such multilayer structures.
