  All spin logic device (ASLD) blazes an alternative path for realizing
ultra-low power computing in the Post-Moore era. However, initial device
structure relying on ferromagnetic input/output and spin transfer torque (STT)
driven magnetization switching degrades its performance and even hinders its
realization. In this paper, we propose an ASLD based on rare-earth
(RE)-transition-metal (TM) ferromagnetic alloy that can achieve an ultra-high
frequency up to terahertz. The spin orbit torque (SOT) induced fast precession
near the spin angular momentum compensated point is investigated through the
macrospin model. Combining the non-local spin current diffusing from the input
to the output, a deterministic picosecond switching can be realized without any
external magnetic field. Our results show that ASLD has the potential to exceed
the performance of mainstream computing.
