The importance of the interface for picosecond spin pumping in antiferromagnet-heavy metal heterostructures.

ABSTRACT: Interfaces in heavy metal (HM) - antiferromagnetic insulator (AFI) heterostructures have recently become highly investigated and debated systems in the effort to create spintronic devices that function at terahertz frequencies. Such heterostructures have great technological potential because AFIs can generate sub-picosecond spin currents which the HMs can convert into charge signals. In this work we demonstrate an optically induced picosecond spin transfer at the interface between AFIs and Pt using time-domain THz emission spectroscopy. We select two antiferromagnets in the same family of fluoride cubic perovskites, KCoF₃ and KNiF₃, whose magnon frequencies at the centre of the Brillouin zone differ by an order of magnitude. By studying their behaviour with temperatur

SUBMITTER: Kholid FN 

PROVIDER: S-EPMC9892507 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature