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Nonequilibrium ferroelectric-ferroelastic 10-nm nanodomains: wrinkles, period-doubling, and power-law relaxation

Research output: Contribution to journalArticle

Author(s)

James Floyd Scott, Donald Evans, Ram Katiyar, Raymond McQuaid, J. Marty Gregg

School/Research organisations

Abstract

Since the 1935 work of Landau and Lifshitz and of Kittel in 1946 all ferromagnetic, ferroelectric, and ferroelastic domains have been thought to be straight-sided with domain widths proportional to the square root of the sample thickness. We show in the present work that this is not true. We also discover period doubling domains predicted by Metaxas et al. (Phys. Rev. Lett. 2008, 217208) and modeled by Wang and Zhao Q. (Sci. Rpts. 2015, 5, 8887). We examine non-equilibrium ferroic domain structures in perovskite oxides with respect to folding, wrinkling, and relaxation and suggest that structures are kinetically limited and in the viscous flow regime predicted by Metaxas et al. in 2008 but never observed experimentally. Comparisons are made with liquid crystals and hydrodynamic instabilities, including chevrons, and fractional power-law relaxation. As Shin et al. [Soft Mat. 2016, 12, 3502] recently emphasized: “An understanding of how these folds initiate, propagate, and interact with each other is still lacking.” Inside each ferroelastic domain are ferroelectric 90-degree nano-domains with 10-nm widths and periodicity in agreement with the 10-nm theoretical minima predicted by Feigl et al. (Nat. Commun. 2014, 5, 4677). Evidence is presented for domain-width period doubling, which is common in polymer films but unknown in ferroic domains. A discussion of the folding-to-period doubling phase transition model of Wang and Zhao is included.
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Details

Original languageEnglish
Article number304001
Number of pages8
JournalJournal of Physics: Condensed Matter
Volume29
Issue number30
Early online date23 Jun 2017
DOIs
Publication statusPublished - 2 Aug 2017

    Research areas

  • Ferroelectrics, Domains, Non-equilibrium

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