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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.45: Poster
Tuesday, September 6, 2022, 17:30–20:00, P2
Spin current transmission in LaSrMnO / NiO / Pt layers — •Evangelos Th. Papaioannou1, Camillo Ballani1, Philipp Geier1, Philip Trempler1, Christoph Hauser1, Olena Gomonay2, and Georg Schmidt1 — 1Institute of Physics, Martin-Luther University Halle-Wittenberg, 06120 Halle, Germany — 2Institute of Physics, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
We investigate the effect of spin pumping and inverse spin-Hall effect (ISHE) in trilayers composed of a ferromagnetic half-metal/ antiferromagnetic oxide/non-magnetic layer in the form of La0.7Sr0.3MnO3/ NiO (x nm) / Pt. The generated spin current is pumped through the antiferromagnetic NiO layer and is detected via ferromagnetic resonance and ISHE measurements at low temperatures down to 10K. We refine two competing mechanisms of spin transport whose contribution to spin transport and supremacy is temperature dependent. The mechanism arising from the direct exchange coupling between FM and AFM dominates below the blocking temperature, while the spin pumping mechanism dominates above the blocking temperature and shows to be more efficient spin current transport through NiO layers.