Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Helicity, anisotropies and their competition in a multiferroic magnet:
  insight from the phase diagram   Motivated by the complex phase diagram of MnWO4, we investigate competition
between anisotropy, magnetic field, and helicity for the anisotropic
next-nearest-neighbor Heisenberg model. Apart from two competing exchanges,
which favor a spiral magnetic structure, the model features the bi-axial
single-ion anisotropy. The model is treated in the real-space mean-field
approximation and the phase diagram containing various incommensurate and
commensurate states is obtained for different field orientations. We discuss
similarities and differences of the theoretical phase diagram and the
experimental diagram of MnWO4.

24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci