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Title: Geometric control of emergent antiferromagnetic order in coupled artificial spin ices

Abstract

Artificial spin ices (ASIs) composed of coupled nanomagnets offer the possibility to create designer geometrical frustration and manipulate inter-nanomagnet interactions. In particular, by using a dimer motif consisting of two strongly coupled single-domain nano magnets as a building block, we can control and realize intriguing antiferromagnetic physical states in which the magnetic charge is not conserved. Here we create a dimer kagome ASI system within which the antiferromagnetic order is controlled by tuning lattice geometry. Different disordered antiferromagnetic phases and the inter-nanomagnet interactions are visualized directly in demagnetized lattices with different lattice parameters. Monte Carlo simulations establish that the collective ground state consists of disordered antiferromagnetic dimers across the lattice when the intra-dimer interaction is dominant. However, for lattices governed by intra-triad-unit interactions, the ground state exhibits a longrange spin-ordered state in which the vertex magnetic charge is uniform across all triads.

Authors:
ORCiD logo [1];  [2];  [2];  [2];  [3];  [1];  [2]; ORCiD logo [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
OSTI Identifier:
1872951
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Cell Reports Physical Science
Additional Journal Information:
Journal Volume: 3; Journal Issue: 4; Journal ID: ISSN 2666-3864
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; Antiferromagnetic coupling; Artificial spin ice; classic spin liquid

Citation Formats

Li, Yue, Barrows, Frank, McCray, Arthur R.C., Cote, Timothy, Friedman, David, Divan, Ralu N.S., Petford-Long, Amanda K., and Phatak, Charudatta. Geometric control of emergent antiferromagnetic order in coupled artificial spin ices. United States: N. p., 2022. Web. doi:10.1016/j.xcrp.2022.100846.
Li, Yue, Barrows, Frank, McCray, Arthur R.C., Cote, Timothy, Friedman, David, Divan, Ralu N.S., Petford-Long, Amanda K., & Phatak, Charudatta. Geometric control of emergent antiferromagnetic order in coupled artificial spin ices. United States. https://doi.org/10.1016/j.xcrp.2022.100846
Li, Yue, Barrows, Frank, McCray, Arthur R.C., Cote, Timothy, Friedman, David, Divan, Ralu N.S., Petford-Long, Amanda K., and Phatak, Charudatta. Mon . "Geometric control of emergent antiferromagnetic order in coupled artificial spin ices". United States. https://doi.org/10.1016/j.xcrp.2022.100846. https://www.osti.gov/servlets/purl/1872951.
@article{osti_1872951,
title = {Geometric control of emergent antiferromagnetic order in coupled artificial spin ices},
author = {Li, Yue and Barrows, Frank and McCray, Arthur R.C. and Cote, Timothy and Friedman, David and Divan, Ralu N.S. and Petford-Long, Amanda K. and Phatak, Charudatta},
abstractNote = {Artificial spin ices (ASIs) composed of coupled nanomagnets offer the possibility to create designer geometrical frustration and manipulate inter-nanomagnet interactions. In particular, by using a dimer motif consisting of two strongly coupled single-domain nano magnets as a building block, we can control and realize intriguing antiferromagnetic physical states in which the magnetic charge is not conserved. Here we create a dimer kagome ASI system within which the antiferromagnetic order is controlled by tuning lattice geometry. Different disordered antiferromagnetic phases and the inter-nanomagnet interactions are visualized directly in demagnetized lattices with different lattice parameters. Monte Carlo simulations establish that the collective ground state consists of disordered antiferromagnetic dimers across the lattice when the intra-dimer interaction is dominant. However, for lattices governed by intra-triad-unit interactions, the ground state exhibits a longrange spin-ordered state in which the vertex magnetic charge is uniform across all triads.},
doi = {10.1016/j.xcrp.2022.100846},
journal = {Cell Reports Physical Science},
number = 4,
volume = 3,
place = {United States},
year = {Mon Apr 11 00:00:00 EDT 2022},
month = {Mon Apr 11 00:00:00 EDT 2022}
}

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