Neel spin-orbit torque (NSOT) is a novel tool for spin manipulation in antiferromagnets with special symmetry (CuMnAs, Mn2
Au). As shown experimentally, application of current through such materials can lead to switching of the Neel vector. With clear opportunity of high-speed control of antiferromagnetic ordering, there were yet no investigations of NSOT time-dynamics in the terahertz range.This talk will present our recent results in measuring ultrafast spin dynamics in Mn2
Au following application of free-space terahertz pulses. The data indicates that the THz-induced NSOT acts on Mn2
Au spins and launches an 0.6 THz antiferromagnetic resonance mode.