After the recent progress in fields of ultrafast demagnetization and generation of intense terahertz (THz) pulses [1, 2], the THz time-domain spectroscopy (TDTS) has found its way to explore ultrafast spintronic phenomena. By covering energies from 0.4 to 200 meV, it complements optical pump-probe techniques by resonant probing of various excitations in solid states, such as electron scattering rate, spin-orbit interaction or antiferromagnetic resonance. In this talk, we will show how TDTS can provide new insight into well established spintronic phenomena like anisotropic and spin-Hall magnetoresistance , ultrafast demagnetization and ultrafast spin currents , or spin Hall and Seebeck effects [5,6,7].
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