Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification
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Published version
Author(s)
Type
Journal Article
Abstract
Ferromagnetic resonance (FMR) is performed on kagome artificial spin ice (ASI) formed of disconnected Ni80 Fe20 nanowires. Here we break the threefold angular symmetry of the kagome lattice by altering the coercive field of each sublattice via shape anisotropy modification. This allows for distinct high-frequency responses when a magnetic field is aligned along each sublattice and additionally enables simultaneous spin-wave resonances to be excited in all nanowire sublattices, unachievable in conventional kagome ASI. The different coercive field of each sublattice allows selective magnetic switching via global field, unlocking novel microstates inaccessible in homogeneous-nanowire ASI. The distinct spin-wave spectra of these states are detected experimentally via FMR and linked to underlying microstates using micromagnetic simulation.
Date Issued
2019-08-01
Date Acceptance
2019-08-01
Citation
Physical Review B, 2019, 100 (5)
ISSN
2469-9950
Publisher
American Physical Society
Journal / Book Title
Physical Review B
Volume
100
Issue
5
Copyright Statement
©2019 American Physical Society.
Sponsor
Imperial College Trust
The Leverhulme Trust
Engineering and Physical Sciences Research Council
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000482446800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
N/A
RPG-2016-306
EP/P030548/1
Subjects
Science & Technology
Technology
Physical Sciences
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Materials Science
Physics
MONOPOLES
Publication Status
Published
Article Number
054433
Date Publish Online
2019-08-01