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Dataset associated with "Frustration and thermalisation in an arti cial magnetic quasicrystal"

Shi, Dong and Budrikis, Zoe and Stein, Aaron and Morley, SA and Olmsted, Peter D and Burnell, Gavin (2017) Dataset associated with "Frustration and thermalisation in an arti cial magnetic quasicrystal". University of Leeds. [Dataset]

Dataset description

We have created and studied artificial magnetic quasicrystals based on Penrose tiling patterns of interacting nanomagnets that lack the translational symmetry of spatially periodic artificial spin ices. Vertex-level degeneracy and frustration induced by the network topology of the Penrose pattern leads to a low energy configuration that we propose as a ground state. Topologically induced emergent frustration means that this ground state cannot be constructed from vertices in their ground states. It has two parts, a quasi-one-dimensional rigid "skeleton" that spans the entire pattern and is capable of long-range order, and "flippable" clusters of macrospins within it. These lead to macroscopic degeneracy for the array as a whole. Magnetic force microscopy imaging of Penrose tiling arrays revealed superdomains that are larger for more strongly coupled arrays. The superdomain size is larger after AC-demagnetisation and especially after annealing the array above its blocking temperature.

Subjects: F000 - Physical sciences > F300 - Physics
F000 - Physical sciences > F300 - Physics > F310 - Applied physics
F000 - Physical sciences > F300 - Physics > F320 - Chemical physics > F321 - Solid-state physics
Divisions: Faculty of Mathematics and Physical Sciences > School of Physics and Astronomy
Related resources:
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited: 04 Oct 2017 13:37




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