TITLE

Dielectric response of polycrystalline Sr1-1.5xBixTiO3 thin films under direct current bias

AUTHOR(S)
Okhay, Olena; Aiying Wu; Vilarinho, Paula M.; Tkach, Alexander
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p062912
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effect of dc electric field Edc on the dielectric behavior of sol-gel derived Sr1-1.5xBixTiO3 films on Si/SiO2/TiO2/Pt substrates is systematically studied between 10 and 300 K. The rounded peak in the temperature dependence of the dielectric constant [variant_greek_epsilon]′(T) of all Sr1-1.5xBixTiO3 films is strongly suppressed under dc bias. The observed dielectric behavior is attributed to the formation of polar dipoles by the introduction of Bi into Sr site. A high tunability (∼40%) and communication quality factor (∼10 000) under 100 kV/cm make moderately Bi-doped SrTiO3 films a promising material for tunable devices.
ACCESSION #
52929548

 

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