Non-local magnon transport in Pt/Li<sub>0.5</sub>Al<sub>1.0</sub>Fe<sub>1.5</sub>O<sub>4</sub> systems
ORAL
Abstract
Spin wave-based electronics rely on the existence of low damping magnetic insulators for coherent excitation and propagation of spin waves. Toward this end, it is important to study non-local magnon transport in such systems to gauge their promise as media for spin wave transport. Previously, we demonstrated the synthesis of the novel spinel oxide magnetic insulator Li0.5Al1.0Fe1.5O4 (LAFO) films on (001) oriented MgGa2O4 (MGO) and MgAl2O4 (MAO) substrates that possess a Gilbert damping parameter on the order of 10-3. In this talk, we present our results on non-local magnon transport in LAFO/MGO and LAFO/MAO systems, in which LAFO exhibits strain-induced perpendicular magnetic anisotropy and easy-plane magnetic anisotropy respectively. By studying the non-local voltage amplitude generated via the inverse spin Hall effect as a function of the separation of two overlaying Pt electrodes, we extract a spin diffusion length in LAFO of 1.8 um. This large spin diffusion length corroborates the low damping in LAFO and shows the promise of LAFO as a candidate material for future spintronics applications.
*This work was supported by the U.S. Department of Energy, Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Contract No. DESC0008505.
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Presenters
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Xin Yu Zheng
- Stanford University