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Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

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Authors
Wang, D.
Chan, N.
Choy, S.
Tian, Hu-Yong
Chan, L.
Li, S
Date
2010
Type
Journal Article

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Wang, D.Y. and Chan, N.Y. and Choy, S. and Tian, H.Y. and Chan, H.L.W. and Li, S. 2010. Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films. Applied Physics Letters. 97 (21): pp. 212901-1-212901-3.
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Applied Physics Letters
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Department of Imaging and Applied Physics
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Copyright (2010) 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 Applied Physics Letters. 97 (21): pp. 212901-1-212901-3 and may be found at http://dx.doi.org/10.1063/1.3518484.

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Abstract

Doping effects with respect to the electrical properties of morphotropic phase boundary Bi0.5Na0.50.94Ba0.06TiO3 thin films epitaxially grown on CaRuO3 electroded LaAlO30.3Sr2AlTaO60.35 (001) substrates were investigated. Substantial enhancement of ferroelectricity and piezoelectricity has been achieved in La+Ce codoped films with a remanent polarization Pr of 29.5 C/cm2 and a remanent piezoelectric coefficient d33f of 31 pm/V, whereas Mn doping seems more favorite to reduce the leakage current by two order of magnitude. Both doped films exhibited diodelike I-V characteristics, which are correlated with resistance switching effect.