Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crossed ratchet effects for magnetic domain wall motion   We study both experimentally and theoretically the driven motion of domain
walls in extended amorphous magnetic films patterned with a periodic array of
asymmetric holes. We find two crossed ratchet effects of opposite sign that
change the preferred sense for domain wall propagation, depending on whether a
flat or a kinked wall is moving. By solving numerically a simple $\phi^4$-model
we show that the essential physical ingredients for this effect are quite
generic and could be realized in other experimental systems involving elastic
interfaces moving in multidimensional ratchet potentials.

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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys