Acoustic spin pumping: Direct generation of spin currents from sound waves in Pt/Y3Fe5O12 hybrid structures
arXiv:1108.4238 · doi:10.1063/1.3688332
Abstract
Using a Pt/Y3Fe5O12 (YIG) hybrid structure attached to a piezoelectric actuator, we demonstrate the generation of spin currents from sound waves. This "acoustic spin pumping" (ASP) is caused by the sound wave generated by the piezoelectric actuator, which then modulates the distribution function of magnons in the YIG layer and results in a pure-spin-current injection into the Pt layer across the Pt/YIG interface. In the Pt layer, this injected spin current is converted into an electric voltage due to the inverse spin-Hall effect (ISHE). The ISHE voltage induced by the ASP is detected by measuring voltage in the Pt layer at the piezoelectric resonance frequency of the actuator coupled with the Pt/YIG system. The frequency-dependent measurements enable us to separate the ASP-induced signals from extrinsic heating effects. Our model calculation based on the linear response theory provides us with a qualitative and quantitative understanding of the ASP in the Pt/YIG system.
8 pages, 6 figures
References in corpus (9)
- Direct electronic measurement of the spin Hall effect
- Spin Seebeck insulator
- Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
- Theory of magnon-driven spin Seebeck effect
- Acoustic spin pumping as the origin of the long-range spin Seebeck effect
- Linear-response theory of spin Seebeck effect in ferromagnetic insulators
- Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
- Phonon driven spin distribution due to the spin-Seebeck effect
- Gigantic enhancement of spin Seebeck effect by phonon drag
Cited by in corpus (11)
- Theory of the Spin Seebeck Effect
- Mechanical generation of spin current by spin-rotation coupling
- Magnon-polaron transport in magnetic insulators
- Magnon-phonon interactions in magnon spintronics
- Plasmonic generation of spin currents
- Acoustic parametric pumping of spin waves
- Enhancement of acoustic spin pumping by acoustic distributed Bragg reflector cavity
- Unidirectional planar Hall voltages induced by surface acoustic waves in ferromagnetic thin films
- Waves of spin-current in magnetized dielectrics
- Magnetically Ordered Insulators for Advanced Spintronics
- Surface acoustic wave driven acoustic spin splitter in d-wave altermagnetic thin films