Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current-driven periodic domain wall creation in ferromagnetic nano-wires   We predict the electrical generation and injection of domain walls into a
ferromagnetic nano-wire without the need of an assisting magnetic field. Our
analytical and numerical results show that above a critical current $j_{c}$
domain walls are injected into the nano-wire with a period $T \sim
(j-j_{c})^{-1/2}$. Importantly, domain walls can be produced periodically even
in a simple exchange ferromagnet with uniaxial anisotropy, without requiring
any standard "twisting" interaction like Dzyaloshinskii-Moriya or dipole-dipole
interactions. We show analytically that this process and the period exponents
are universal and do not depend on the peculiarities of the microscopic
Hamiltonian. Finally we give a specific proposal for an experimental
realization.

13
The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat