Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Size Dependence of Oxygen-annealing Effects on Superconductivity of
  Fe{1+y}Te{1-x}S{x}   For the Fe-based superconductor Fe{1+y}Te{1-x}S{x}, superconductivity is
induced by annealing treatment in oxygen atmosphere, whereas as-grown samples
do not show superconductivity. We have investigated the sample-size dependence
of O2-annealing effects in Fe1.01Te0.91S0.09. The annealing conditions are
fixed to be 1 atm, 200 C, and 2 hours. We have carried out magnetic
susceptibility and specific heat measurements in order to evaluate the
superconducting volume fraction. We have found that Fe{1+y}Te{1-x}S{x} has an
optimal size for the induction of bulk superconductivity by O2 annealing. Our
results indicate that O2 annealing is probably effective near the surface of
samples over a length of a few tens of micro meters.

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The categories of this paper are: plasm-ph
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex