Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.53: Poster
Dienstag, 6. September 2022, 17:30–20:00, P2
Enhancement of THz emission from Fe/L10-FePt/Pt spintronic emitters — •Laura Scheuer1, Moritz Ruhwedel1, Dominik Sokoluk3, Garik Torosyan4, Marco Rahm3, Burkard Hillebrands1, Thomas Kehagias2, René Beigang1, and Evangelos Papaioannou5 — 1Department of Physics and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Kaiserslautern, Germany — 2Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece — 3Fachbereich Elektro-Informationstechnik and Landesforschungszentrum OPTIMAS, University of Kaiserslautern, Kaiserslautern, Germany — 4Photonic Center Kaiserslautern, Kaiserslautern, Germany — 5Institute for Physics, Martin-Luther University Halle Wittenberg, Halle, Germany
The development of thin film multilayers composed of a ferromagnetic metal (FM) layer and a non-magnetic metal (NM) layer as sources for THz emission opened a new direction in physics.
In this presentation we concentrate on the impact of the FM/NM interface on the THz emission. We intentionally modify the Fe/Pt interface by manipulating the Pt growth temperature to achieve the formation of an ordered L10-FePt alloy interlayer. Subsequently, we find a Fe/L10-FePt (2nm)/Pt configuration to be significantly superior to a Fe/Pt bilayer structure, regarding THz emission amplitude and bandwidth. Both can be controlled by the extent of alloying on either side of the interface [1].
[1] L. Scheuer et al.: THz emission from Fe/Pt spintronic emitters with L10-FePt alloyed interface, iScience, Volume 25, Issue 5, 2022