Observation of transient states during magnetization reversal in a quasicrystal artificial spin ice

Brajuskovic, V.; Addi, A.; Phatak, C.; Petford-Long, A. K.

doi:10.1103/PhysRevB.98.094424

Title: Observation of transient states during magnetization reversal in a quasicrystal artificial spin ice

Journal Article · 25 September 2018 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.98.094424 · OSTI ID:1475561

Brajuskovic, V. ^[1]; Addi, A. ^[2]; Phatak, C. ^[3]; Petford-Long, A. K. ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
College of DuPage, Glen Ellyn, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

Artificial spin ices (ASIs) consisting of arrays of magnetic bars are key systems in the study of geometric frustration in magnetic systems. Of particular interest are quasicrystal (QC) ASIs, in which the lack of translational symmetry and the varying coordination number of interacting bars allow for topologically enhanced frustrated magnetization to occur. We have directly observed the formation of magnetic vortexes within the vertices of a QC-ASI as a metastable transient state, during the magnetization reversal process. We observed that the vortexes primarily form in a specific subset of the vertex motif types. Furthermore, micromagnetic simulations show that although these magnetic vortexes result in an increase in the local energy of the vertex before the magnetization of the bars reverses to align with the applied magnetic field, the overall energy increase is lower than the higher energy motif configurations that would result from reversal of the magnetization in the connecting bar.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1475561

Alternate ID(s):: OSTI ID: 1473747

Journal Information:: Physical Review B, Vol. 98, Issue 9; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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