Wide-range control of ferromagnetic resonance by spin Hall effect

V. E. Demidov, S. Urazhdin, E. R. J. Edwards, S. O. Demokritov

doi:10.1063/1.3655908

Wide-range control of ferromagnetic resonance by spin Hall effect

DOI PDF 被引用文献2件

V. E. Demidov

University of Muenster 1 Institute for Applied Physics and Center for Nonlinear Science, , Corrensstrasse 2-4, 48149 Muenster, Germany
S. Urazhdin

Emory University 2 Department of Physics, , Atlanta, Georgia 30322, USA
E. R. J. Edwards

University of Muenster 1 Institute for Applied Physics and Center for Nonlinear Science, , Corrensstrasse 2-4, 48149 Muenster, Germany
S. O. Demokritov

University of Muenster 1 Institute for Applied Physics and Center for Nonlinear Science, , Corrensstrasse 2-4, 48149 Muenster, Germany

説明

<jats:p>We demonstrate experimentally that the characteristics of the ferromagnetic resonance in a microscopic magnetic system based on a Permalloy/Cu/Pt multilayer can be varied over a wide range by the spin Hall effect. Specifically, by applying a dc current through the Pt strip, we achieve a reduction of the effective damping constant in Permalloy by a factor of two below its standard value. We show that this reduction is not significantly affected by the Joule heating effects. We also find that, apart from influencing the damping, the spin Hall effect results in the amplification or suppression of the coherent magnetization dynamics.</jats:p>