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MA: Fachverband Magnetismus
MA 22: Terahertz Spintronics
MA 22.5: Talk
Tuesday, March 28, 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.