Spatially correlated molecular field theory of phase transition in amorphous ferromagnets

Abstract
The behavior of amorphous ferromagnets near the phase transition temperature is significantly different from that of simple crystalline ferromagnets. A non‐local Landau‐Ginzburg theory based upon the spatially correlated molecular field is introduced. The theory correctly describes the curvatures in the inverse susceptibility vs. temperature plot and in the Arrott plot.