Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonuniform switching ferromagnetic layers by spin polarized current   The magnetic reversal by spin-polarized current of a magnetic junction
consisting of two ferromagnetic layers and a nonmagnetic spacer in between is
considered. Initially, the free layer is magnetized antiparallel to the pinned
layer by an external magnetic field. Under current flowing, a nonequilibrium
spin polarization appears in the free layer. The interaction between the
injected spins and the lattice leads to instability of the antiparallel
orientation at the high enough current density and to switching the free layer
to a state with magnetization parallel to one in the pinned layer. If the free
layer thickness and the external magnetic field strength are large enough, then
a nonuniform switching is favorable, so that only a part of the free layer near
the injector switches. Such a switching is accompanied with appearance of a
domain wall between the switched and non-switched regions. The domain wall can
oscillate around the equilibrium position with some natural frequency depending
on the external magnetic field.

32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org