Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inducing out-of-plane precession of magnetization for microwave assisted
  magnetic recording using an oscillating polarizer in spin torque oscillator   We investigated the dynamics of a novel design of spin torque oscillator
(STO) for microwave assisted magnetic recording. Using Ni$_{80}$Fe$_{20}$
(NiFe) as the polarizer and Fe$_{67}$Co$_{33}$ (FeCo) as the field generating
layer, we experimentally observed the magnetization reversal of NiFe, followed
by multiple signals in the power spectra as the bias voltage increased. The
signals reflected the out-of-plane precession (OPP) mode oscillation of both
FeCo and NiFe, as well as the magnetoresistance effect of the STO device, which
had the frequency equal to the difference between the oscillation frequency of
NiFe and FeCo. Such dynamics were reproduced by micromagnetic simulation. In
addition to the merit of realizing the OPP mode oscillation with a simple and
thin structure suitable for a narrow gap recording head, the experimental
results using this design suggested that a large cone angle of $\sim$
70$^{\circ}$ for the OPP mode oscillation of FeCo was achieved, which was
estimated based on the macrospin model.

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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
16
The categories of this paper are: stat
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The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an