- Letter
Magnon transport in nanostructures with reduced effective magnetization
Phys. Rev. B 104, L180410 – Published 29 November, 2021
DOI: https://doi.org/10.1103/PhysRevB.104.L180410
Abstract
For applications making use of magnonic spin currents damping effects, which decrease the spin conductivity, have to be minimized. We here investigate the magnon transport in a yttrium iron garnet thin film with strongly reduced effective magnetization. We show that in a three-terminal device the effective magnon conductivity can be increased by a factor of up to six by a current applied to a modulator electrode, which generates damping compensation above a threshold current. Moreover, we find a linear dependence of this threshold current on the applied magnetic field. We can explain this behavior by the reduced effective magnetization and the associated nearly circular magnetization precession.
