Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin dynamics of anisotropic azimuthal modes in heterogeneous magnetic
  nanodisks   It is well known that azimuthal spin wave modes of magnetic vortex state in
permalloy nanodisks have circular symmetry. Intuitively, magnetic materials
having magnetocrystalline anisotropy is not compatible with the circular
symmetry of the azimuthal modes. In this article, however, we report cubic
azimuthal modes in heterogeneous nanodisks consisting of a permalloy core and a
Fe shell. The fourfold symmetry of azimuthal modes is due to the exchange, and
magneto-static, interactions between the permalloy core and the Fe shell. In
comparison to results of circular azimuthal mode, the vortex switching occurs
considerably faster under the excitation of cubic azimuthal mode. The gyration
path of vortex core turns into square under the influence of induced cubic
anisotropy in the Py region. We find out periodic oscillation of the vortex
core size and the gyration speed as well. Our findings may offer a new route
for spintronic applications using heterogeneous magnetic nanostructures.

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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys