  We focus on understanding the influence of the two-component coupling in
ferronematics, a colloidal suspension of magnetic nanoparticles in nematic
liquid crystals. Using coarse-grained Landau-de Gennes free energies, we study
the ordering dynamics of this complex fluid and present a range of analytical
and numerical results. Our main observations are: (i) slaved coarsening for
quench temperatures $T$ intermediate to the critical temperatures of the
uncoupled components, (ii) slower growth similar to the Lifshitz-Slyozov law
($L \sim t^{1/3}$) for symmetric magneto-nematic coupling, (iii) sub-domain
morphologies dominated by interfacial defects for asymmetric coupling
strengths. These novel results will serve to guide future experiments on this
technologically important system.
