Recent studies have revealed 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 curved geometries. Here, through micromagnetic simulations, we present a method for writing strip-domain walls into curved 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 superior 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.
@article{arxiv.1701.03886,
title = {Paving Spin-Wave Fibers in Magnonic Nanocircuits Using Spin-Orbit Torque},
author = {Xiangjun Xing and Philip W. T. Pong and J. Åkerman and Yan Zhou},
journal= {arXiv preprint arXiv:1701.03886},
year = {2017}
}
Comments
main manuscript: 38 pages and 8 figures; supplemental material: 21 pages, 12 figures, and 1 table