Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Threshold Current of Domain Wall Motion under Extrinsic Pinning,
  $\beta$-Term and Non-Adiabaticity   Threshold current of domain wall motion under spin-polarized electric current
in ferromagnets is theoretically studied based on the equation of motion of a
wall in terms of collective coordinates. Effects of non-adiabaticity and a
so-called $\beta$-term in Landau-Lifshitz equation, which are described by the
same term in the equation of motion of a wall, are taken into account as well
as extrinsic pinning. It is demonstrated that there are four different regimes
characterized by different dependence of threshold on extrinsic pinning,
hard-axis magnetic anisotropy, non-adiabaticity and $\beta$.

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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: stat
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th