Reconfigurable magnonic mode-hybridisation and spectral control in a bicomponent artificial spin ice
File(s)
Working paper
Author(s)
Type
Working Paper
Abstract
Strongly-interacting nanomagnetic arrays are finding increasing use as model host systems for reconfigurable magnonics. The strong inter-element coupling allows for stark spectral differences across a broad microstate space due to shifts in the dipolar field landscape. While these systems have yielded impressive initial results, developing rapid, scaleable means to access abroad range of spectrally-distinct microstates is an open research problem.We present a scheme whereby square artificial spin ice is modified by widening a 'staircase' subset of bars relative to the rest of the array, allowing preparation of any ordered vertex state via simple global-field protocols. Available microstates range from the system ground-state to high-energy 'monopole' states, with rich and distinct microstate-specific magnon spectra observed. Microstate-dependent mode-hybridisation and anticrossings are observed at both remanence and in-field with dynamic coupling strength tunable via microstate-selection. Experimental coupling strengths are found up to g / 2$\pi$ = 0.15 GHz. Microstate control allows fine mode-frequency shifting, gap creation and closing, and active mode number selection.
Date Issued
2021-03-18
Publisher
arXiv
Copyright Statement
© 2021 The Author(s). The item is published under CC BY license.
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
The Leverhulme Trust
Identifier
http://arxiv.org/abs/2101.07767v3
Grant Number
EP/P02520X/1
RPG-2017-257
Subjects
cond-mat.mes-hall
cond-mat.mes-hall
physics.app-ph
cond-mat.mes-hall
cond-mat.mes-hall
physics.app-ph
Publication Status
Published