Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite-size scaling effect on N\'eel temperature of antiferromagnetic
  Cr$_2$O$_3$-(0001) films in an exchange-coupled heterostructure   The scaling of antiferromagnetic ordering temperature of corundum-type
chromia films have been investigated. N\'eel temperature $T_N$ was determined
from the effect of perpendicular exchange-bias on the magnetization of a
weakly-coupled adjacent ferromagnet. For a thick-film case, the validity of
detection is confirmed by a susceptibility measurement. Detection of $T_N$ was
possible down to 1-nm-thin chromia films. The scaling of ordering temperature
with thickness was studied using different buffering materials, and compared
with Monte-Carlo simulations. The spin-correlation length and the corresponding
critical exponent were estimated, and they were consistent between experimental
and simulation results. The spin-correlation length is an order of magnitude
less than cubic antiferromagnets. We propose that the difference is from the
change of number of exchange-coupling links in the two crystal systems.

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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: math
13
The categories of this paper are: quant-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-th