Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Commensurate Antiferromagnetism in CePt2In7, a Nearly Two-Dimensional
  Heavy Fermion System   CePt$_2$In$_7$ is a new heavy fermion system with a structure similar to the
CeMIn$_5$ system but with greater two-dimensional character. We report the
synthesis and characterization of phase pure polycrystalline material, which
reveals an antiferromagnetic transition at $T_N = 5.2$ K. Nuclear Quadrupolar
Resonance (NQR) studies indicate that the antiferromagnetism is commensurate
and exhibits strong antiferromagnetic fluctuations in the paramagnetic state.

22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys