Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From Bubble to Skyrmion: Dynamic Transformation Mediated by a Strong
  Magnetic Tip   Skyrmions in thin metallic ferromagnetic films are stable due to competition
between the RKKY interaction and uniaxial magnetic anisotropy. We mimic the
RKKY interaction by the next-nearest-neighbors ferromagnetic and
antiferromagnetic exchange interactions. We demonstrate analytically and
numerically dissipative transformation of a bubble created by a strong
cylindrical magnetic tip into a stable Skyrmion.

3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
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The categories of this paper are: solv-int
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: math
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph