  We report a systematic study of current-induced perpendicular magnetization
switching in W/Co$_{x}$Tb$_{1-x}$/Al thin films with strong perpendicular
magnetic anisotropy. Various Co$_{x}$Tb$_{1-x}$ ferrimagnetic alloys with
different magnetic compensation temperatures are presented. The systems are
characterized using MOKE, SQUID and anomalous Hall resistance at different
cryostat temperature ranging from 10 K to 350 K. The current-switching
experiments are performed in the spin-orbit torque geometry where the current
pulses are injected in plane and the magnetization reversal is detected by
measuring the Hall resistance. The full reversal magnetization has been
observed in all samples. Some experimental results could only be explained by
the strong sample heating effect during the current pulses injection. We have
found that, for a given composition $x$ and switching polarity, the devices
always reach the same temperature $\textit{T}_{switch}(x)$ before switching
independently of the cryostat temperature. $\textit{T}_{switch}$ seems to scale
with the Curie temperature of the Co$_{x}$Tb$_{1-x}$ ferrimagnetic alloys. This
explains the evolution of the critical current (and critical current density)
as a function of the alloy concentration. Future application could take
advantages of this heating effect which allows reducing the in-plane external
field. Unexpected double magnetization switching has been observed when the
heat generated by the current allows crosses the compensation temperature.
