Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrafast switching of a nanomagnet by a combined out-of-plane and
  in-plane polarized spin-current pulse   We report on spin valve devices that incorporate both an out-of-plane
polarizer (OPP) to quickly excite spin torque (ST) switching and an in-plane
polarizer/analyzer (IPP). For pulses < 200 ps we observe reliable precessional
switching due largely to ST from the OPP. Compared to a conventional spin
valve, for a given current in the short pulse regime the addition of the OPP
can decrease the pulse width necessary for switching by a factor of 10 or more.
The influence of the IPP is most obvious at longer, smaller pulses, but also
has beneficial ST consequences for short pulse switching.

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The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org