Direct imaging of coexisting ordered and frustrated sublattices in artificial ferromagnetic quasicrystals

B. Farmer, V. S. Bhat, A. Balk, E. Teipel, N. Smith, J. Unguris, D. J. Keavney, J. T. Hastings, L. E. De Long

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

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.

Original languageEnglish
Article number134428
JournalPhysical Review B
Volume93
Issue number13
DOIs
StatePublished - Apr 25 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Direct imaging of coexisting ordered and frustrated sublattices in artificial ferromagnetic quasicrystals'. Together they form a unique fingerprint.

Cite this