Simulations of cubic-tetragonal ferroelastics

A. E. Jacobs, S. H. Curnoe, and R. C. Desai
Phys. Rev. B 68, 224104 – Published 11 December 2003
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Abstract

We study domain patterns in cubic-tetragonal ferroelastics by solving numerically equations of motion derived from a Landau model of the phase transition, including dissipative stresses. Our system sizes, of up to 2563 points, are large enough to reveal many structures observed experimentally. Most patterns found at late stages in the relaxation are multiply banded; all three tetragonal variants appear, but inequivalently. Two of the variants form broad primary bands; the third intrudes into the others to form narrow secondary bands with the hosts. On colliding with walls between the primary variants, the third either terminates or forms a chevron. The multiply banded patterns, with the two domain sizes, the chevrons and the terminations, are seen in the microscopy of zirconia and other cubic-tetragonal ferroelastics. We examine also transient structures obtained much earlier in the relaxation; these show the above features and others also observed in experiment.

  • Received 23 February 2003

DOI:https://doi.org/10.1103/PhysRevB.68.224104

©2003 American Physical Society

Authors & Affiliations

A. E. Jacobs1,*, S. H. Curnoe2,†, and R. C. Desai1,‡

  • 1Department of Physics, University of Toronto, Toronto, Ontario, M5S 1A7, Canada
  • 2Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, A1B 3X7, Canada

  • *Electronic address: jacobs@physics.utoronto.ca
  • Electronic address: curnoe@physics.mun.ca
  • Electronic address: desai@physics.utoronto.ca

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Vol. 68, Iss. 22 — 1 December 2003

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