Comment on ‘‘Particle-size effects on the value of TC of MnFe2O4: Evidence for finite-size scaling’’

Abstract
We show that a nonequilibrium cation distribution is the likely explanation for the 47-K rise in the Curie temperature of ultrafine MnFe2 O4 particles found by Kulkarni et al. This nonequilibrium cation distribution is argued to be caused, in part, by oxidation of Mn2+ to Mn3+ due to heating of the particles during the experiments performed by Kulkarni et al. to determine the Curie temperature.