Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NMR Evidence for Antiferromagnetic Transition in the Single-Component
  Molecular System, [Cu(tmdt)$_{2}$]   The magnetic state of the single-component molecular compound,
[Cu(tmdt)$_{2}$], is investigated by means of $^{1}$H-NMR. An abrupt spectral
broadening below 13 K and a sharp peak in nuclear spin-lattice relaxation rate,
$T_{1}^{-1}$, at 13 K are observed as clear manifestations of a second-order
antiferromagnetic transition, which is consistent with the previously reported
magnetic susceptibility and EPR measurement. The ordered moment is estimated at
$0.22-0.45$ ${\mu}_{\rm B}$/molecule. The temperature-dependence of
$T_{1}^{-1}$ above the transition temperature indicates one-dimensional spin
dynamics and supports that the spins are on the central part of the molecule
differently from other isostructural compounds.

13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat