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Paving Spin-Wave Fibers in Magnonic Nanocircuits Using Spin-Orbit Torque

Journal article
Authors X. J. Xing
P. W. T. Pong
Johan Åkerman
Y. Zhou
Published in Physical Review Applied
Volume 7
Issue 5
ISSN 2331-7019
Publication year 2017
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1103/PhysRevApplied.7...
Keywords MAGNETIC DOMAIN-WALLS, CURRENT-DRIVEN DYNAMICS, BUILDING-BLOCKS, SKYRMION, MOTION, OSCILLATORS, SPINTRONICS, SYMMETRY
Subject categories Physical Sciences

Abstract

Recent studies reveal that domain walls in magnetic nanostructures can serve as compact, energy-efficient spin-wave waveguides for building magnonic devices that are considered promising candidates for overcoming the challenges and bottlenecks of today's CMOS technologies. However, imprinting long strip-domain walls into magnetic nanowires remains a challenge, especially in bent geometries. Here, through micromagnetic simulations, we present a method for writing strip-domain walls into bent magnetic nanowires using spin-orbit torque. We employ Y-shaped magnetic nanostructures as well as an S-shaped magnetic nanowire to demonstrate the injection process. In addition, we verify that the Y-shaped nanostructures that incorporate strip-domain walls can function as superb spin-wave multiplexers and that spin-wave propagation along each conduit can be controllably manipulated. This spin-wave multiplexer based on strip-domain walls is expected to become a key signal-processing component in magnon spintronics.

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