The critical behavior of the specific heat of small magnetic particles
of the real antiferromagnet Cr2O3 is investigated by the Monte-Carlo
method. The critical indices alpha = 0.17 +/- 0.03 and the ratio of th
e critical amplitudes A/A' = 1.03 +/- 0.07 are calculated for particle
s containing N = 286 to 2502 spins. (C) 1998 American Institute of Phy
sics. [S1063-7834(98)02009-7].