Comparing artificial frustrated magnets: tuning symmetry in nanomagnet arrays

Details Comparing artificial frustrated magnets: tuning symmetry in nanomagnet arrays Comparing artificial frustrated magnets: tuning symmetry in nanomagnet arrays

2010-03-07

arxiv.org/abs/1003.1505v1

Phys. Rev. B 81, 092406 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages and 4 figures

Scientific paper

10.1103/PhysRevB.81.092406

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 pair-wise 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.

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