Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical behavior of sputter-deposited magnetoelectric antiferromagnetic
  Cr$_2$O$_3$ films near N\'eel temperature   Chromium(III) oxide is a classical collinear antiferromagnet with a linear
magnetoelectric effect. We are presenting the measurements of the
magnetoelectric susceptibility $\alpha$ of a sputter-deposited 500-nm film and
a bulk single-crystal of Cr$_\mathrm{2}$O$_\mathrm{3}$. We investigated the
magnetic phase-transition and the critical exponent $\beta$ of the sublattice
magnetization near N\'eel temperature. For the films, an exponent of 0.49(1)
was found below 293 K, and changed to 1.06(4) near the N\'eel temperature of
298 K. For the single-crystal, the exponent was constant at 0.324(4). We
investigated the reversal probability of antiferromagnetic domains during
magnetoelectric field cooling. For the sputtered films, reversal probability
was zero above 298 K and stabilized only below 293 K. We attribute this
behavior to formation of grains during film growth, which gives different
intergrain and intragrain exchange-coupling energies. For the single-crystal,
reversal probability was stabilized immediately at the N\'eel temperature of
307.6 K.

15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex