Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large magnetoresistance and spin-dependent output voltage in a lateral
  MnGa/GaAs/MnGa spin-valve device   We investigated the spin-dependent transport properties of a lateral
spin-valve device with a 600 nm-long GaAs channel and ferromagnetic MnGa
electrodes with perpendicular magnetization. Its current-voltage
characteristics show nonlinear behavior below 50 K, indicating that tunnel
transport through the MnGa/GaAs Schottky barrier is dominant at low
temperatures. We observed clear magnetoresistance (MR) ratio up to 12% at 4 K
when applying a magnetic field perpendicular to the film plane. Furthermore, a
large spin-dependent output voltage of 33 mV is obtained. These values are the
highest in lateral ferromagnetic metal / semiconductor / ferromagnetic metal
spin-valve devices reported so far.

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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: econ