  By considering symmetric and asymmetric dipolar coupled mixtures (with
dysprosium and erbium isotopes), we report a study on relevant anisotropic
effects, related to spatial separation and miscibility, due to dipole-dipole
interactions (DDIs) in rotating binary dipolar Bose-Einstein condensates. The
binary mixtures are kept in strong pancake-like traps, with repulsive two-body
interactions modeled by an effective two-dimensional (2D) coupled
Gross-Pitaevskii equation. The DDI are tuned from repulsive to attractive by
varying the dipole polarization angle. A clear spatial separation is verified
in the densities for attractive DDIs, being angular for symmetric mixtures and
radial for asymmetric ones. Also relevant is the mass-imbalance sensibility
observed by the vortex-patterns in symmetric and asymmetric-dipolar mixtures.
In an extension of this study, here we show how the rotational properties and
spatial separation of these dipolar mixture are affected by a quartic term
added to the harmonic trap of one of the components.
