Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse transition in the dipolar frustrated Ising ferromagnet: the role
  of domain walls   We present a theoretical study aimed to elucidate the origin of the inverse
symmetry breaking transition observed in ultrathin magnetic films with
perpendicular anisotropy. We study the behavior of the dipolar frustrated Ising
model in a mean field approximation as well as two other models with simple
domain walls. By a numerical analysis we show that the internal degrees of
freedom of the domain walls are decisive for the presence of the inverse
symmetry breaking transition. In particular, we show that in a sharp domain
wall model the inverse transition is absent. At high temperatures the
additional degrees of freedom of the extended domain walls increase the entropy
of the system leading to a reduction of the free energy of the stripe phase.
Upon lowering the temperature the domain walls become narrow and with the
corresponding degrees of freedom effectively frozen, which eventually induces
an inverse transition to the competing homogeneous phase. We also show that,
for growing external field at constant temperature, the stripe width grows
strongly when approaching the critical field line and diverges at the
transition. These results indicate that the inverse transition is a continuous
phase transition and that the domain wall profiles as well as the temperature
has little effect on the critical behavior of the period of the domain as
function of the applied field.

33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph