Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impact of Fe site Co substitution on superconductivity of
  Fe1-xCoxSe0.5Te0.5 (x = 0.0 to 0.10): A flux free single crystal study   We report synthesis of Co substitution at Fe site in Fe1-xCoxSe0.5Te0.5
(x=0.0 to 0.10) single crystals via vacuum shield solid state reaction route
using flux free method. Single crystal XRD results showed that these crystals
grow in (00l) plane i.e., orientation in c-direction. All the crystals possess
tetragonal structure having P4/nmm space group. Detailed scanning electron
microscopy (SEM) images show that the crystals are grown in slab-like
morphology. The EDAX results revealed the final elemental composition to be
near stoichiometric. Powder X-Ray diffraction (PXRD) Rietveld analysis results
show that (00l) peaks are shifted towards higher angle with increasing Co
concentration. Both a and c lattice parameters decrease with increasing Co
concentration in Fe1-xCoxSe0.5Te0.5 (x=0.0 to 0.10) single crystals. Low
temperature transport and magnetic measurements show that the superconducting
transition temperature (Tc), decreases from around 12K to 10K and 4K for x=0.03
and x=0.05 respectively. For x=0.10 crystal superconductivity is not observed
down to 2K.

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The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: math
6
The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs