Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermophysical and magnetic properties of p- and n-type Ti-Ni-Sn based
  half-Heusler alloys   A total of 5 different half-Heusler alloys, two p-type and two n-type with
the fifth a charge compensated alloy have been designed and synthesized. The
thermophysical properties of these alloys have been investigated in the range
10 K to 1000 K while the magnetic behavior has been studied up to 300 K. The
electrical resistivity of all the alloys varies within the range 0.06 to 5
m{\Omega} cm indicating that they are in the degenerate semiconductor limits.
The temperature dependence of p-type alloys exhibits a transition from metallic
to semiconducting behavior, typical of topological insulators. The transition
is found to occur in the range 300 K to 500 K. The n-type and compensated
alloys exhibit a weak metallic behavior in the complete temperature range. The
Seebeck coefficient in the p-type alloys increases with temperature reaching a
maximum value of 50 microV K-1 while that of the n-type alloys increases
continuously reaching a value of 45 microV K-1 at ~ 800 K. The corresponding
power factor of the n-type alloy reaches 900 microW m-1 K-2 at ~ 900 K compared
to a maximum of ~ 250 microW m-1 K-2 at 700 K for the p-type alloy.
Magnetically the p-type and n-type alloys are found to be paramagnetic while
the compensated alloy exhibits a ferromagnetic behavior.

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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
3
The categories of this paper are: physics