Numerical Study of Elastic Effects by Cubic-Tetragonal Symmetry Breaking on the Ordering Kinetics

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Elastic effects by cubic-tetragonal symmetry breaking on the ordering kinetics are investigated. We propose a coarse-grained model characterized by a Ginzburg-Landau free energy with non-conserved order parameters coupled to an elastic field. By numerical study we obtain an oval shaped domain and a square domain in two dimensions and a plate-like domain and a rod-like domain in three dimensions. And in the coarsening process, a striped pattern is obtained. These patterns are remarkably similar to morphologies observed in real cubic-tetragonal order-disorder alloys. Moreover, we study the dynamics during the coarsening process by analyzing the change of the total domain boundaries LDB(t). LDB(t) decreases as a power of time: t(α > 0). The exponent a becomes small with increasing the magnitude of the elastic effects.

Original languageEnglish
Pages (from-to)2628-2637
Number of pages10
Journaljournal of the physical society of japan
Volume66
Issue number9
DOIs
Publication statusPublished - 1997 Sep

    Fingerprint

Keywords

  • Coarsening process
  • Cubic-tetragonal symmetry breaking
  • Elastic effect
  • Morphologies
  • Pattern formation
  • Simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this