Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4886
Title: Improvement of ferroelectric fatigue endurance in multiferroic (Ba₀.₅Sr₀.₅)TiO₃/(Bi₁.₀₅La₀.₀₅)FeO₃/(Ba₀.₅Sr₀.₅)TiO₃ sandwich structures
Authors: Miao, J
Zhang, BP
Chew, KH
Wang, Y 
Issue Date: 11-Feb-2008
Source: Applied physics letters, 11 Feb. 2008, v. 92, no. 6, 062902, p. 1-3
Abstract: We report the improved ferroelectric properties in dielectric/multiferroic/dielectric sandwich structures composed of Ba₀.₅Sr₀.₅TiO₃(BST) and Bi₁.₀₅La₀.₀₅FeO₃ (BLF). Compared with the single BLF film, the trilayer structures exhibit a lower dielectric loss and weaker frequency dependence of dielectric properties. At room temperature, the remnant polarization and saturation polarization of the trilayer structures are 34.3 and 46.9 μC/cm², respectively. More interestingly, the polarization of BST/BLF/BST trilayer exhibits a fatigue-free characteristic of up to 10⁹ switching cycles. Applying Dawber’s model, the concentration of oxygen vacancies and barrier energy of oxygen vacancies migration in BST/BLF/BST trilayer are calculated as 6.1×10¹⁷ cm⁻³ and 1.33 eV, respectively.
Keywords: Dielectric losses
Energy barriers
Fatigue of materials
Ferroelectric materials
Oxygen vacancies
Polarization
Sandwich structures
Publisher: American Institute of Physics
Journal: Applied physics letters 
ISSN: 0003-6951
EISSN: 1077-3118
DOI: 10.1063/1.2841672
Rights: © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Miao et al., Appl. Phys. Lett. 92, 062902 (2008) and may be found at http://link.aip.org/link/?apl/92/062902
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