Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Textured heterogeneity in square artificial spin ice   We report evidence of spontaneous formation of a heterogeneous network of
superdomains in two-dimensional square artificial spin ice nanostructures in
externally applied magnetic fields. The magnetic heterogeneity is locally
disordered but has a zig-zag texture at longer length scales. Resonant coherent
soft-x-ray scattering off such textures give rise to unique internal structure
in Bragg peaks. Our result shows that the macroscopic magnetic texture is
derived from the microscopic structure of the Dirac strings.

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The categories of this paper are: astro-ph
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
2
The categories of this paper are: math