Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $LnCu_3(OH)_6Cl_3 (Ln = Gd, Tb, Dy)$: Heavy Lanthanides on Spin-1/2
  Kagome Magnets   The spin-1/2 kagome antiferromagnets are key prototype materials for studying
frustrated magnetism. Three isostructural kagome antiferromagnets
LnCu$_3$(OH)$_6$Cl$_3$ (Ln = Gd, Tb, Dy) have been successfully synthesized by
the hydrothermal method. LnCu$_3$(OH)$_6$Cl$_3$ adopts space group
$P\overline{3}m1$ and features the layered Cu-kagome lattice with lanthanide
Ln$^{3+}$ cations sitting at the center of the hexagons. Although heavy
lanthanides (Ln = Gd, Tb, Dy) in LnCu$_3$(OH)$_6$Cl$_3$ provide a large
effective magnetic moment and ferromagnetic-like spin correlations compared to
light-lanthanides (Nd, Sm, Eu) analogues, Cu-kagome holds an
antiferromagnetically ordered state at around 17 K like YCu$_3$(OH)$_6$Cl$_3$.

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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys