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Title: Effect of surface ionic screening on the polarization reversal scenario in ferroelectric thin films: Crossover from ferroionic to antiferroionic states

Abstract

Nonlinear electrostatic interaction between the surface ions of electrochemical nature and ferroelectric dipoles gives rise to the coupled ferroionic states in nanoscale ferroelectrics. Here, we investigated the role of the surface ions formation energy value on the polarization states and polarization reversal mechanisms, domain structure and corresponding phase diagrams of ferroelectric thin films. Using 3D finite elements modeling we analyze the distribution and hysteresis loops of ferroelectric polarization and ionic charge, and dynamics of the domain states. These calculations performed over large parameter space delineate the regions of single- and poly- domain ferroelectric, ferroionic, antiferroionic and non-ferroelectric states as a function of surface ions formation energy, film thickness, applied voltage and temperature. We further map the analytical theory for 1D system onto effective Landau-Ginzburg free energy and establish the correspondence between the 3D numerical and 1D analytical results. In conclusion, this approach allows performing the overview of the ferroionic system phase diagrams and exploring the specifics of switching and domain evolution phenomena.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [2];  [3];  [2]
  1. National Academy of Sciences of Ukraine, Kyiv (Ukraine)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. National Academy of Sciences of Ukraine, Kyiv (Ukraine); Taras Shevchenko Kyiv National Univ., Kyiv (Ukraine)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1413615
Alternate Identifier(s):
OSTI ID: 1411998
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Morozovska, Anna N., Eliseev, Eugene A., Kurchak, Anatolii I., Morozovsky, Nicholas V., Vasudevan, Rama K., Strikha, Maksym V., and Kalinin, Sergei V. Effect of surface ionic screening on the polarization reversal scenario in ferroelectric thin films: Crossover from ferroionic to antiferroionic states. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.245405.
Morozovska, Anna N., Eliseev, Eugene A., Kurchak, Anatolii I., Morozovsky, Nicholas V., Vasudevan, Rama K., Strikha, Maksym V., & Kalinin, Sergei V. Effect of surface ionic screening on the polarization reversal scenario in ferroelectric thin films: Crossover from ferroionic to antiferroionic states. United States. doi:10.1103/PhysRevB.96.245405.
Morozovska, Anna N., Eliseev, Eugene A., Kurchak, Anatolii I., Morozovsky, Nicholas V., Vasudevan, Rama K., Strikha, Maksym V., and Kalinin, Sergei V. Fri . "Effect of surface ionic screening on the polarization reversal scenario in ferroelectric thin films: Crossover from ferroionic to antiferroionic states". United States. doi:10.1103/PhysRevB.96.245405. https://www.osti.gov/servlets/purl/1413615.
@article{osti_1413615,
title = {Effect of surface ionic screening on the polarization reversal scenario in ferroelectric thin films: Crossover from ferroionic to antiferroionic states},
author = {Morozovska, Anna N. and Eliseev, Eugene A. and Kurchak, Anatolii I. and Morozovsky, Nicholas V. and Vasudevan, Rama K. and Strikha, Maksym V. and Kalinin, Sergei V.},
abstractNote = {Nonlinear electrostatic interaction between the surface ions of electrochemical nature and ferroelectric dipoles gives rise to the coupled ferroionic states in nanoscale ferroelectrics. Here, we investigated the role of the surface ions formation energy value on the polarization states and polarization reversal mechanisms, domain structure and corresponding phase diagrams of ferroelectric thin films. Using 3D finite elements modeling we analyze the distribution and hysteresis loops of ferroelectric polarization and ionic charge, and dynamics of the domain states. These calculations performed over large parameter space delineate the regions of single- and poly- domain ferroelectric, ferroionic, antiferroionic and non-ferroelectric states as a function of surface ions formation energy, film thickness, applied voltage and temperature. We further map the analytical theory for 1D system onto effective Landau-Ginzburg free energy and establish the correspondence between the 3D numerical and 1D analytical results. In conclusion, this approach allows performing the overview of the ferroionic system phase diagrams and exploring the specifics of switching and domain evolution phenomena.},
doi = {10.1103/PhysRevB.96.245405},
journal = {Physical Review B},
number = 24,
volume = 96,
place = {United States},
year = {2017},
month = {12}
}

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