Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perpendicular Magnetization and Generic Realization of the Ising Model
  in Artificial Spin Ice   We have studied frustrated kagome arrays and unfrustrated honeycomb arrays of
magnetostatically-interacting single-domain ferromagnetic islands with
magnetization normal to the plane. The measured pairwise spin correlations of
both lattices can be reproduced by models based solely on nearest-neighbor
correlations. The kagome array has qualitatively different magnetostatics but
identical lattice topology to previously-studied 'artificial spin ice' systems
composed of in-plane moments. The two systems show striking similarities in the
development of moment pair correlations, demonstrating a universality in
artificial spin ice behavior independent of specific realization in a
particular material system.

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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom