  Domain wall motion along ferrimagnets is evaluated using micromagnetic
simulations and a collective-coordinates model, both considering two
sublattices with independent parameters. Analytical expressions are derived for
strips on top of either a heavy metal or a substrate with negligible
interfacial Dzyaloshinskii-Moriya Interaction. The work focuses its findings in
this latter case, with a field-driven domain wall motion depicting precessional
dynamics which become rigid at the angular momentum compensation temperature,
and a current-driven dynamics presenting more complex behavior, depending on
the polarization factors for each sublattice. Importantly, our analyses provide
also novel interpretation of recent evidence on current-driven domain wall
motion, where walls move either along or against the current depending on
temperature. Besides, our approach is able to substantiate the large
non-adiabatic effective parameters found for these systems.
