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Control of magnetic fluctuations by spin current

Published

Author(s)

Vladislav E. Demidov, Sergei Urazhdin, Eric Edwards, Mark D. Stiles, Robert McMichael, Sergej O. Demokritov

Abstract

We utilize micro-focus Brillouin light scattering spectroscopy to study the interaction of spin current generated by the spin Hall effect with magnetic fluctuations in a Permalloy microdisc. We show that the fluctuations can be efficiently enhanced or suppressed by different directions of the current. Additionally, we find that the effect of spin current on magnetic fluctuations is strongly influenced by nonlinear magnon-magnon interactions. The observed phenomena can be utilized for controllable reduction of thermal noise in spintronic nanodevices.
Citation
Physical Review Letters
Volume
107
Issue
10

Keywords

spin-transfer torque, magnetization dynamics, magnetic damping, ferromagnetic resonance, spin current, spin Hall effect, Brillouin light scattering, spin waves

Citation

Demidov, V. , Urazhdin, S. , Edwards, E. , Stiles, M. , McMichael, R. and Demokritov, S. (2011), Control of magnetic fluctuations by spin current, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=908492 (Accessed April 16, 2024)
Created September 1, 2011, Updated October 12, 2021