Tuning of polarization, internal electric field, and hysteresis loop behaviours in BaTiO3/BaxSr1-xTiO3 superlattices

Lim, Kok Geng and Chew, Khian Hooi (2018) Tuning of polarization, internal electric field, and hysteresis loop behaviours in BaTiO3/BaxSr1-xTiO3 superlattices. Journal of Applied Physics, 123 (10). p. 104101. ISSN 0021-8979

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Official URL: https://doi.org/10.1063/1.5012130

Abstract

A thermodynamic model based on the Landau-Ginzburg theory is developed to study the polarization and hysteresis loop behaviors in ferroelectric superlattices with technologically important BaxSr1-xTiO3 (BST) solid solutions. Our study shows that the polarization, coercive field, and hysteresis loop behaviors can be tailored by changing the thickness ratio and the Ba/Sr content of BST. The study also found that the sign of the internal fields depends sensitively on both thickness ratio and Ba/Sr content of BST. Both results imply that the internal electric field of superlattice can be tuned to yield zero polarizing or depolarizing field via manipulation of thickness ratio and composition. These findings could pave the way to enhance the efficiency of ferroelectric photovoltaic devices by manipulating the internal electric field through thickness and composition.

Item Type: Article
Uncontrolled Keywords: Barium titanate; Electric fields; Ferroelectricity; Hysteresis; Hysteresis loops; Polarization
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 31 May 2019 04:01
Last Modified: 31 May 2019 04:01
URI: http://eprints.um.edu.my/id/eprint/21447

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