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MA: Fachverband Magnetismus
MA 22: Thin Films: Coupling Effects and Exchange Bias
MA 22.7: Talk
Wednesday, March 20, 2024, 11:30–11:45, H 2013
Spin currents in ferrimagnetic heterostructures — •Felix Fuhrmann1, Akashdeep Akashdeep1, Sven Becker1, Zengyao Ren1,2, Mathias Weiler3, Gerhard Jakob1,2, and Mathias Kläui1,2,4 — 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
In response to the growing demand for energy-efficient information technology, magnons emerge as promising information carriers [1]. To advance magnon-based devices, essential materials requirements must be met. The insulating ferrimagnet Yttrium Iron Garnet (YIG, Y3Fe5O12) and related garnets, such as Gadolinium Iron Garnet (GIG, Gd3Fe5O12), stand out with their low damping and resulting large magnon propagation lengths [1]. Employing pulsed laser deposition, we fabricated heterostructures of YIG and GIG, revealing a ferromagnetic coupling between the Fe sublattices of the two layers, leading to complex magnetic response to external magnetic fields and a nontrivial temperature dependence [2]. Exploring spin current generation via the spin Seebeck effect and spin pumping at ferromagnetic resonance, our findings align with our macrospin model [3]. [1] A. Chumak et al., Nat. Phys. 11, 453 (2015). [2] S. Becker et al., Phys. Rev. Appl., 16, 014047 (2021). [3] F. Fuhrmann et al., ArXiv:2303.15085 (2023).
Keywords: Spin Dynamics; Spin Transport; Spin Seebeck Effect; Rare Earth Garnet