Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monte Carlo study of half-magnetization plateau and magnetic phase
  diagram in pyrochlore antiferromagnetic Heisenberg model   The antiferromagnetic Heisenberg model on a pyrochlore lattice under external
magnetic field is studied by classical Monte Carlo simulation. The model
includes bilinear and biquadratic interactions; the latter effectively
describes the coupling to lattice distortions. The magnetization process shows
a half-magnetization plateau at low temperatures, accompanied with strong
suppression of the magnetic susceptibility. Temperature dependence of the
plateau behavior is clarified. Finite-temperature phase diagram under the
magnetic field is determined. The results are compared with recent experimental
results in chromium spinel oxides.

9
The categories of this paper are: nlin
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con