Anisotropic mechanism on distinct transition modes of tip-activated multipolorizaion switching in epitaxial BiFeO3 films

Y. P. Shi, A. K. Soh, G. J. Weng

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Based on the extended Kittel's law, an anisotropic mechanism has been developed to investigate the complex multipolarization switching in (001) and (110) epitaxial BiFeO3 films, under a biased-tip field. Switching inhomogeneity and domain wall width evolution have been specifically accounted for. It has been found that distinct switching modes, i.e., the breakdown mode of 71°-switched domain and the activation mode of 180°/ 109°switching, exist and dominate the switching orders within switching process. Our predicted switching orders show excellent agreements with the existing experimental data and phase-field results. A two-step procedure is also proposed to fabricate single-phase 71°ferroelastic domain array of controllable density using (001) BiFeO3 films, which is favored in practice to significantly enhance the magnetoelectric coupling and photovoltage.

Original languageEnglish (US)
Article number024102
JournalJournal of Applied Physics
Volume109
Issue number2
DOIs
StatePublished - Jan 15 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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