Control of Propagating Spin Waves via Spin Transfer Torque in a Metallic Bilayer Waveguide

Abstract

We investigate the effect of a direct current on propagating spin waves in a CoFeB/Ta bilayer structure. Using the micro-Brillouin light scattering technique, we observe that the spin wave amplitude may be attenuated or amplified depending on the direction of the current and the applied magnetic field. Our work suggests an effective approach for electrically controlling the propagation of spin waves in a magnetic waveguide and may be useful in a number of applications such as phase locked nano-oscillators and hybrid information processing devices.

5 pages,5 figures

References in corpus (4)

• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Realization of XNOR and NAND spin-wave logic gates
• Current induced torques and interfacial spin-orbit coupling: Semiclassical Modeling
• Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices

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