Crystallite size dependence of morphotropic phase boundary in the multiferroic BiFeO3-PbTiO3

Bastola Narayan; V. Kothai; Rajeev Ranjan

Crystallite size dependence of morphotropic phase boundary in the multiferroic BiFeO3-PbTiO3

Materials Science 2015-07-21 v1

Authors: Bastola Narayan , V. Kothai , Rajeev Ranjan

Abstract

The morphotropic phase boundary (MPB) in the magnetoelectric multiferroic BiFeO3-PbTiO3 is shown to be uniquely dependent on crystallite size. The system exhibits the phenomenon of abnormal grain growth (AGG) during sintering with abrupt increase in the grain size from ~ 1 micron to ~ 10 microns. The large sized free crystallites (10 microns) exhibit pure tetragonal phase. Phase coexistence sets in after reducing the size to ~ 1 micron. These results prove that size, and not the internal stress, as the controlling mechanism for stabilizing phase coexistence in this system.

Keywords

morphotropic phase boundary BiFeO3-PbTiO3 multiferroic crystallite size abnormal grain growth phase coexistence

Cite

@article{arxiv.1507.05163,
  title  = {Crystallite size dependence of morphotropic phase boundary in the multiferroic BiFeO3-PbTiO3},
  author = {Bastola Narayan and V. Kothai and Rajeev Ranjan},
  journal= {arXiv preprint arXiv:1507.05163},
  year   = {2015}
}

Comments

11 pages 2 figures and 1 table

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