Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/16500
Tipo: Artigo
Título: Realization of rectangular artificial spin Ice and direct observation of high energy topology
Autor(es): Ribeiro, I. R. B.
Nascimento, F. S.
Ferreira, S. O.
Moura-Melo, W. A.
Costa, C. A. R.
Borme, J.
Freitas, P. P.
Wysin, G. M.
Araujo, C. I. L. de
Pereira, A. R.
Abstract: In this work, we have constructed and experimentally investigated frustrated arrays of dipoles forming two-dimensional artificial spin ices with different lattice parameters (rectangular arrays with horizontal and vertical lattice spacings denoted by a and b respectively). Arrays with three different aspect ratios γ = a/b = 2‾√, 3‾√ and 4‾√ are studied. Theoretical calculations of low-energy demagnetized configurations for these same parameters are also presented. Experimental data for demagnetized samples confirm most of the theoretical results. However, the highest energy topology (doubly-charged monopoles) does not emerge in our theoretical model, while they are seen in experiments for large enough γ. Our results also insinuate that the string tension connecting two magnetic monopoles in a pair vanishes in rectangular lattices with a critical ratio γ = γ c  = 3‾√, supporting previous theoretical predictions.
Palavras-chave: High energy
Topology
Editor: Scientific Reports
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1038/s41598-017-14421-w
http://www.locus.ufv.br/handle/123456789/16500
Data do documento: 25-Out-2017
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