Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of the superconducting critical transition temperature of
  LaBaCaCu3O7-d and NdBaCaCu3O7-d   LaBaCaCu3O7 (La:1113) and NdBaCaCu3O7 (Nd:1113) compounds are synthesized by
solid state reaction route. Both compounds crystallize in tetragonal structure.
  Four probe resistivity measurements showed that superconducting transition
temperature (Tc) is 73 K and 41 K respectively for La:1113 and Nd:1113
compounds. Considering the fact that for RE:123 (REBa2Cu3O7) compounds the Tc
hardly depends upon the choice of RE (Rare earth, except Ce, Pr and Tb), the
current nearly two fold increase in Tc of La:1113 when compared to Nd:1113,
warrants serious discussion.

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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: nlin
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph