  In this work, we present a linear stability analysis of fully-ionized
rotating plasma disks with a temperature gradient and a sub-thermal background
magnetic field (oriented towards the axial direction). We describe how the
plasma reacts when galvanometric and thermo-magnetic phenomena, such as Hall
and Nernst-Ettingshausen effects, are taken into account, and meridian
perturbations of the plasma are considered. It is shown how, in the ideal case,
this leads to a significant overlap of the Magneto-rotational Instability and
the Thermo-magnetic one. Considering dissipative effects, an overall damping of
the unstable modes, although not sufficient to fully suppress the instability,
appears especially in the thermo-magnetic related branch of the curve.
