Magnonic bending, phase shifting and interferometry in a 2D reconfigurable nanodisk crystal.
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Strongly interacting nanomagnetic systems are pivotal across next-generation technologies including reconfigurable magnonics and neuromorphic computation. Controlling magnetization states and local coupling between neighboring nanoelements allows vast reconfigurability and a host of associated functionalities. However, existing designs typically suffer from an inability to tailor interelement coupling post-fabrication and nanoelements restricted to a pair of Ising-like magnetization states. Here, we propose a class of reconfigurable magnonic crystals incorporating nanodisks as the functional element. Ferromagnetic nanodisks are crucially bistable in macrospin and vortex states, allowing interelement coupling to be selectively activated (macrospin) or deactivated (vortex). Through microstate engineering, we leverage the distinct coupling behaviors and magnonic band structures of bistable nanodisks to achieve reprogrammable magnonic waveguiding, bending, gating, and phase-shifting across a 2D network. The potential of nanodisk-based magnonics for wave-based computation is demonstrated via an all-magnon interferometer exhibiting XNOR logic functionality. Local microstate control is achieved here via topological magnetic writing using a magnetic force microscope tip.
Date Issued
2020-12-15
Date Acceptance
2020-12-03
Citation
ACS Nano, 2020, 15 (1), pp.674-685
ISSN
1936-0851
Publisher
American Chemical Society
Start Page
674
End Page
685
Journal / Book Title
ACS Nano
Volume
15
Issue
1
Copyright Statement
© 2020 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsnano.0c06894
Sponsor
Engineering & Physical Science Research Council (EPSRC)
The Leverhulme Trust
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/33320533
Grant Number
EP/G004765/1
RPG-2017-257
Subjects
artificial spin system
magnonics
metamaterials
microstate control
nanomagnetism
reconfigurable magnonic crystal
tunable coupling
Publication Status
Published
Coverage Spatial
United States
Date Publish Online
2020-12-15