SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 22: Terahertz Spintronics

MA 22.5: Vortrag

Dienstag, 28. März 2023, 16:00–16:15, POT 6

Impact of the magnetic layer crystal growth optimization on the THz emission from spintronic Fe/Pt emitters — •Laura Scheuer¹, Agne Ciuciulkaite², Anna L. Ravensburg², Merlin Pohlit², Tobias Warnatz², Garik Torosyan³, René Beigang¹, Georg Schmidt⁴, Evangelos Th. Papaioannou⁴, and Vassilios Kapaklis² — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 56, 67663, Kaiserslautern, Germany — ²Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden — ³Photonic Center Kaiserslautern, 67663, Kaiserslautern, Germany — ⁴Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle, Germany

We investigate the THz emission characteristics of ferromagnetic/non-magnetic metallic heterostructures, focusing on thin Fe/Pt bilayers. In particular, we report on the impact of optimized crystal growth of the epitaxial Fe layers on the THz emission amplitude and spectral bandwidth. We demonstrate a 5% enhancement of the emitted intensity related to structural quality of the Fe layer. Our work provides a pathway for optimal spintronic THz emitters devices based on epitaxial Fe. It also highlights how THz emission measurements can be utilized to characterize the changes in out-of-equilibrium spin current dynamics in metallic heterostructures, driven by subtle structural refinement.