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Showing 1–3 of 3 results
Advanced filters: Author: Dominik Hamara Clear advanced filters

  • The authors measure picosecond spin pumping in FeRh as a function of temperature by optical pump-THz emission spectroscopy. In the antiferromagnetic phase of FeRh enhanced spin pumping above the value measured in the ferromagnetic phase is observed.

    • Dominik Hamara
    • Mara Strungaru
    • Chiara Ciccarelli
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • By placing an antiferromagnet next to a heavy metal such as platinum, magnetic excitations in the antiferromagnet drive a spin current in the heavy metal, leading to terahertz emission. Here, Kholid et al study the terahertz emission of two antiferromagnets, KCoF3 and KNiF3 with very different magnon frequencies, and find that the opening of a gap in the magnon density of states drastically alters the spin-transfer efficiency.

    • Farhan Nur Kholid
    • Dominik Hamara
    • Chiara Ciccarelli
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • Here, the authors show that when non-collinear antiferromagnet Mn3Sn is pumped by femtosecond laser pulses it acts as a source of picosecond current pulses that emit electro-dipole radiation in the THz range of the spectrum. The origin of these photo-currents are attributed to the photon drag effect.

    • Dominik Hamara
    • Gunnar F. Lange
    • Chiara Ciccarelli
    ResearchOpen Access
    Communications Physics
    Volume: 6, P: 1-7