Structural transitions of skyrmion lattices in synthetic antiferromagnets

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Thin magnetic films with Dzyaloshinskii-Moriya interactions are known to host skyrmion crystals, which typically have a hexagonal lattice structure. We investigate skyrmion-lattice configurations in synthetic antiferromagnets, i.e., a bilayer of thin magnetic films that is coupled antiferromagnetically. By means of Monte Carlo simulations, we find that by tuning the interlayer coupling the skyrmion lattice structure can be tuned from square to hexagonal. We give a simple interpretation for the existence of this transition based on the fact that for synthetic antiferromagnetic coupling the skyrmions in different layers repel each other and form each others' dual lattice. Our findings may be useful to experimentally switch between two lattice configurations to, for example, modify spin-wave propagation.

TaalEngels
Artikelnummer064402
Aantal pagina's6
TijdschriftPhysical Review B
Volume100
DOI's
StatusGepubliceerd - 5 aug 2019

Vingerafdruk

Magnetic thin films
Spin waves
Crystal lattices
Wave propagation
magnetic films
Tuning
Switches
Crystals
configurations
magnons
wave propagation
interlayers
tuning
crystals
simulation
Monte Carlo simulation
interactions

Citeer dit

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title = "Structural transitions of skyrmion lattices in synthetic antiferromagnets",
abstract = "Thin magnetic films with Dzyaloshinskii-Moriya interactions are known to host skyrmion crystals, which typically have a hexagonal lattice structure. We investigate skyrmion-lattice configurations in synthetic antiferromagnets, i.e., a bilayer of thin magnetic films that is coupled antiferromagnetically. By means of Monte Carlo simulations, we find that by tuning the interlayer coupling the skyrmion lattice structure can be tuned from square to hexagonal. We give a simple interpretation for the existence of this transition based on the fact that for synthetic antiferromagnetic coupling the skyrmions in different layers repel each other and form each others' dual lattice. Our findings may be useful to experimentally switch between two lattice configurations to, for example, modify spin-wave propagation.",
author = "{van Walsem}, Etienne and Duine, {Rembert A.} and J. Lucassen and R. Lavrijsen and Swagten, {H. J.M.}",
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Structural transitions of skyrmion lattices in synthetic antiferromagnets. / van Walsem, Etienne; Duine, Rembert A.; Lucassen, J.; Lavrijsen, R.; Swagten, H. J.M.

In: Physical Review B, Vol. 100, 064402, 05.08.2019.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Structural transitions of skyrmion lattices in synthetic antiferromagnets

AU - van Walsem,Etienne

AU - Duine,Rembert A.

AU - Lucassen,J.

AU - Lavrijsen,R.

AU - Swagten,H. J.M.

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AB - Thin magnetic films with Dzyaloshinskii-Moriya interactions are known to host skyrmion crystals, which typically have a hexagonal lattice structure. We investigate skyrmion-lattice configurations in synthetic antiferromagnets, i.e., a bilayer of thin magnetic films that is coupled antiferromagnetically. By means of Monte Carlo simulations, we find that by tuning the interlayer coupling the skyrmion lattice structure can be tuned from square to hexagonal. We give a simple interpretation for the existence of this transition based on the fact that for synthetic antiferromagnetic coupling the skyrmions in different layers repel each other and form each others' dual lattice. Our findings may be useful to experimentally switch between two lattice configurations to, for example, modify spin-wave propagation.

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