Distortion of Local Order Parameter Caused by Impurities in Displacive Phase Transition

Abstract

Effect of impurities on structural phase transition of displacive typewas examined through molecular dynamics simulation.Anharmonic oscillators were arranged on a two-dimensional square lattice with harmonic nearest-neighbor interaction.Local order parameters were calculated with impurities of different strength.Weak impurities affect more strongly than strong inpurities inrelative magnitude.