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MA: Fachverband Magnetismus

MA 15: Poster I

MA 15.24: Poster

Dienstag, 18. März 2025, 10:00–12:30, P1

Spin dynamics in ferrimagnetic heterostructures — •Felix Fuhrmann¹, Akashdeep Akashdeep¹, Sven Becker¹, Mathias Weiler³, Gerhard Jakob^1,2, and Mathias Kläui^1,2,4 — ¹Institute of Physics, University of Mainz, Germany — ²Graduate School of Excellence "Materials Science in Mainz" (MAINZ), Germany — ³Fachbereich Physik and Landesforschungszentrum OPTIMAS, Rheinland-Pfälzische Technische UniversitätKaiserslautern-Landau, 67663 Kaiserslautern, Germany — ⁴Center for Quantum Spintronics, Norwegian University of Science and Technology, Trondheim, Norway

Magnons emerge as promising information carriers for energy-efficient technology. To advance magnon-based devices, crucial materials requirements must be addressed. Yttrium Iron Garnet (YIG, Y₃Fe₅O₁₂) and related garnets, like Gadolinium Iron Garnet (GdIG, Gd₃Fe₅O₁₂), stand out due to low damping and large magnon propagation lengths. Using pulsed laser deposition, we fabricated YIG/GIG heterostructures and simulated their magnetic properties. Our findings reveal ferromagnetic coupling between Fe sublattices, leading to complex magnetic response and nontrivial temperature dependence [1]. Experiments on spin current generation via spin Seebeck effect and spin pumping at ferromagnetic resonance align with our micromagnetic simulations [2]. These results provide insights for magnon-based devices and highlight YIG/GIG heterostructures’ potential in spintronics applications. [1] S. Becker et al., Phys. Rev. Appl., 16, 014047 (2021). [2] F. Fuhrmann et al., ArXiv:2303.15085 (2023).

Keywords: Spin Dynamics; Spin Transport; Spin Seebeck Effect; Rare Earth Garnet; Micromagnetic Simulation