Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric field-effect on thermodynamics of multiferroic spin chain   Thermodynamic properties of the helical spins with magnetoelectric coupling
is simulated by Monte Carlo algorithm. It is shown that the spin-spin
correlations are affected by the thermal fluctuations and the electric field.
Results for the temperature-dependence of ferroelectric polarization and the
susceptibility are also presented in connection with the multiferroic phase
transition.

8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin