Subterahertz spin pumping from an insulating antiferromagnet

We report subterahertz spin pumping at the interface of the uniaxial insulating antiferromagnet manganese difluoride and platinum. The measured ISHE voltage arising from spin-charge conversion in the platinum layer depends on the chirality of the dynamical modes of the antiferromagnet, which is selectively excited and modulated by the handedness of the circularly polarized subterahertz irradiation. Our results open the door to the controlled generation of coherent, pure spin currents at terahertz frequencies.

Source: ScienceNOW - April 8, 2020 Category: Science Authors: Vaidya, P., Morley, S. A., van Tol, J., Liu, Y., Cheng, R., Brataas, A., Lederman, D., del Barco, E. Tags: Materials Science, Physics r-articles Source Type: news