Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The conducting spin-crossover compound combining Fe(II) cation complex
  with TCNQ in a fractional reduction state   The radical anion salt [Fe{HC(pz)3}2](TCNQ)3 demonstrating conductivity and
spin-crossover transition (SCO) associated with Fe(II) complex cation subsystem
has been synthesized and structurally characterized. A pronounced change of the
dc resistivity and a robust broadening of the EPR signal triggered by the SCO
transition are found. Enhanced EPR line broadening is interpreted in terms of
cross relaxation between the TCNQ and Fe(II) spin subsystems

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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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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: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: q-alg