Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetization switching by spin-orbit torque in an
  antiferromagnet/ferromagnet bilayer system   Spin-orbit torque (SOT)-induced magnetization switching shows promise for
realizing ultrafast and reliable spintronics devices. Bipolar switching of
perpendicular magnetization via SOT is achieved under an in-plane magnetic
field collinear with an applied current. Typical structures studied so far
comprise a nonmagnet/ferromagnet (NM/FM) bilayer, where the spin Hall effect in
the NM is responsible for the switching. Here we show that an
antiferromagnet/ferromagnet (AFM/FM) bilayer system also exhibits a SOT large
enough to switch the magnetization of FM. In this material system, thanks to
the exchange-bias effect of the AFM, we observe the switching under no applied
field by using an antiferromagnetic PtMn and ferromagnetic Co/Ni multilayer
with a perpendicular easy axis. Furthermore, tailoring the stack achieves a
memristor-like behaviour where a portion of the reversed magnetization can by
controlled in an analogue manner. The AFM/FM system is thus a promising
building block for SOT devices as well as providing an attractive pathway
towards neuromorphic computing.

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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: stat
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: cs