  Ferronematics (FNs) are suspensions of magnetic nanoparticles in nematic
liquid crystals (NLCs). They have attracted much experimental attention, and
are of great interest both scientifically and technologically. There are very
few theoretical studies of FNs, even in equilibrium. In this paper, we study
the non-equilibrium phenomenon of domain growth after a thermal quench (or
coarsening) in this coupled system. Our modeling is based on coupled
time-dependent Ginzburg-Landau (TDGL) equations for two order parameters: the
LC tensor order parameter ${\bf Q}$, and the magnetization ${\bf M}$. We
consider both shallow and deep quenches from a high-temperature disordered
phase. The system coarsens by the collision and annihilation of topological
defects. We focus on slaved coarsening, where a disordered ${\bf Q}$ (or ${\bf
M}$) field is driven to coarsen by an ordered ${\bf M}$ (or ${\bf Q}$) field.
We present detailed results for the morphologies and growth laws, which exhibit
unusual features purely due to the magneto-nematic coupling. To the best of our
knowledge, this is the first study of non-equilibrium phenomena in FNs.
