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Direct imaging of coexisting ordered and frustrated sublattices in artificial ferromagnetic quasicrystals.
Farmer, B; Bhat, V S; Balk, A; Teipel, E; Smith, N; Unguris, J; Keavney, D J; Hastings, J T; De Long, L E.
Affiliation
  • Farmer B; Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506-0055, USA.
  • Bhat VS; Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506-0055, USA.
  • Balk A; Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, Maryland 20899, USA.
  • Teipel E; Maryland Nanocenter, University of Maryland, College Park, Maryland 20742, USA.
  • Smith N; Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506-0055, USA.
  • Unguris J; Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506-0055, USA.
  • Keavney DJ; Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, Maryland 20899, USA.
  • Hastings JT; Advanced Photon Source 431-E007, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, Illinois 60439, USA.
  • De Long LE; Department of Electrical and Computer Engineering, University of Kentucky, 453F Paul Anderson Tower, Lexington, Kentucky 40506-0046, USA.
Phys Rev B ; 93(13)2016 Apr.
Article in En | MEDLINE | ID: mdl-28691109
ABSTRACT
We have used scanning electron microscopy with polarization analysis and photoemission electron microscopy to image the two-dimensional magnetization of permalloy films patterned into Penrose P2 tilings (P2T). The interplay of exchange interactions in asymmetrically coordinated vertices and short-range dipole interactions among connected film segments stabilize magnetically ordered, spatially distinct sublattices that coexist with frustrated sublattices at room temperature. Numerical simulations that include long-range dipole interactions between sublattices agree with images of as-grown P2T samples and predict a magnetically ordered ground state for a two-dimensional quasicrystal lattice of classical Ising spins.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev B Year: 2016 Document type: Article Affiliation country: United States
Fulltext
Add to My VHL
Print
XML
PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev B Year: 2016 Document type: Article Affiliation country: United States