Comparing artificial frustrated magnets by tuning the symmetry of nanoscale permalloy arrays

J. Li, X. Ke, S. Zhang, D. Garand, C. Nisoli, P. Lammert, V. H. Crespi, P. Schiffer

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

We study the impact of geometry on magnetostatically frustrated single-domain nanomagnet arrays. We examine square and hexagonal lattice arrays, as well as a brickwork geometry that combines the anisotropy of the square lattice and the topology of the hexagonal lattice. We find that the more highly frustrated hexagonal lattice allows for the most thorough minimization of the magnetostatic energy, and that the pairwise correlations between moments differ qualitatively between hexagonal and brickwork lattices, although they share the same lattice topology. The results indicate that the symmetry of local interaction is more important than overall lattice topology in the accommodation of frustrated interactions.

Original languageEnglish (US)
Article number092406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number9
DOIs
StatePublished - Mar 29 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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