Spin wave amplification using the spin Hall effect in permalloy/platinum bilayers

Abstract

We investigate the effect of an electrical current on the attenuation length of a 900 nm wavelength spin-wave in a permalloy/Pt bilayer using propagating spin-wave spectroscopy. The modification of the spin-wave relaxation rate is linear in current density, reaching up to 14% for a current density of 2.3$\times 10^{11}$A/m${}^2$ in Pt. This change is attributed to the spin transfer torque induced by the spin Hall effect and corresponds to an effective spin Hall angle of 0.13, which is among the highest values reported so far. The spin Hall effect thus appears as an efficient way of amplifying/attenuating propagating spin waves.

References in corpus (11)

• Spin torque switching with the giant spin Hall effect of tantalum
• Spin Transfer Torques
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
• Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
• Intrinsic spin Hall effect in platinum metal
• Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque
• Inverse Spin Hall Effect in NiFe / Normal Metal Bilayers
• Multi-Frequency Magnonic Logic Circuits for Parallel Data Processing
• Control of Propagating Spin Waves via Spin Transfer Torque in a Metallic Bilayer Waveguide
• Thickness dependence of the degree of spin polarization of the electrical current in permalloy thin films

Cited by in corpus (21)

• Magnetization oscillations and waves driven by pure spin currents
• Spin-wave propagation in ultra-thin YIG based waveguides
• Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale
• Spin-orbit-torque magnonics
• Creation of uni-directional spin-wave emitters by utilizing interfacial Dzyaloshinskii-Moriya interaction
• Bridging magnonics and spin-orbitronics
• True amplification of spin waves in magnonic nano-waveguides
• Spin-wave amplification and lasing driven by inhomogeneous spin transfer torques
• Spin wave emission by spin-orbit torque antennas
• Fresnel diffraction of spin waves
• Enhanced magnon spin current using the bosonic Klein paradox
• Charge-to-spin conversion efficiency in ferromagnetic nanowires by spin torque ferromagnetic resonance: Reconciling lineshape and linewidth analysis methods
• Spin wave propagation and spin polarized electron transport in single crystal iron films
• Stimulated-Raman-Adiabatic-Passage mechanism in a magnonic environment
• Quantitative comparison of magnon transport experiments in three-terminal YIG/Pt nanostructures acquired via dc and ac detection techniques
• Level attraction and exceptional points in a resonant spin-orbit torque system
• Determining key spin-orbitronic parameters by means of propagating spin waves
• Amplifying spin waves along Néel domain wall by spin-orbit torque
• Realization of a spin wave switch based on the Spin-Transfer-Torque effect
• Spin-current amplification by stimulated spin pumping
• Characterization of Spin-Transfer-Torque effect induced magnetization dynamics driven by short current pulses