  Employment of the non-trivial proximity effect in Superconductor/Ferromagnet
(S/F) heterostructures for creation of novel superconducting devices requires
an accurate control of magnetic states in complex thin-film multilayers
composing such devices. In this work we study experimentally in-plane transport
properties of micro-structured Nb/Co multilayers. We apply various experimental
techniques for characterization of multilayers, including the anisotropic
magnetoresistance, the Hall effect and the first-order-reversal-curves
analysis. We demonstrate that a combination of those techniques can provide a
detailed knowledge of the magnetic state of the multilayer. In particular, we
identify the range of existence of the coherently rotating, monodomain
scissor-like state. It is anticipated, that in this noncollinear magnetic state
the unconventional odd-frequency spin-triplet order parameter should appear.
The non-hystertic nature of this state allows reversible tuning of the magnetic
orientation. Thus, we identify the range of parameters and the procedure for
controllable operation of devices based on such S/F heterostructures.
