The hysteretic behavior of the epitaxial Pb(Zr,Ti)O3 thin films with different top metal electrodes is studied, with emphasis on the influence of the leakage current and trap generation current on the shape of the loop as well as on the magnitude of the measured polarization. Cu, Pt, and SrRuO3 were used as top contacts and important differences were observed for measurements performed in both dynamic and static modes, although the contacts were deposited on the same epitaxial Pb(Zr,Ti)O3 film grown on SrRuO3/SrTiO3 substrate. A peculiar behavior was observed especially for the static hysteresis loops where, depending of the top contact, the loop is influenced mainly by the leakage current (Pt) or by the trap generation current (Cu and SrRuO3). The last one can contribute with an additive charge, having a linear dependence on the applied voltage, as suggested by the simple model developed to explain the abnormally high values of the dielectric constant extracted from the linear part of the static hysteresis loop. It is concluded that the properties of the top electrode interface can significantly impact the hysteretic behavior of the ferroelectric films.
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15 September 2012
Research Article|
September 26 2012
The effect of the top electrode interface on the hysteretic behavior of epitaxial ferroelectric Pb(Zr,Ti)O3 thin films with bottom SrRuO3 electrode
L. Pintilie;
L. Pintilie
a)
National Institute of Materials Physics
, Atomistilor 105 bis, Bucharest-Magurele 077125, Romania
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I. Pasuk;
I. Pasuk
National Institute of Materials Physics
, Atomistilor 105 bis, Bucharest-Magurele 077125, Romania
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R. Negrea;
R. Negrea
National Institute of Materials Physics
, Atomistilor 105 bis, Bucharest-Magurele 077125, Romania
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L. D. Filip;
L. D. Filip
National Institute of Materials Physics
, Atomistilor 105 bis, Bucharest-Magurele 077125, Romania
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I. Pintilie
I. Pintilie
National Institute of Materials Physics
, Atomistilor 105 bis, Bucharest-Magurele 077125, Romania
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L. Pintilie
a)
I. Pasuk
R. Negrea
L. D. Filip
I. Pintilie
National Institute of Materials Physics
, Atomistilor 105 bis, Bucharest-Magurele 077125, Romania
a)
E-mail: [email protected].
J. Appl. Phys. 112, 064116 (2012)
Article history
Received:
July 05 2012
Accepted:
August 22 2012
Citation
L. Pintilie, I. Pasuk, R. Negrea, L. D. Filip, I. Pintilie; The effect of the top electrode interface on the hysteretic behavior of epitaxial ferroelectric Pb(Zr,Ti)O3 thin films with bottom SrRuO3 electrode. J. Appl. Phys. 15 September 2012; 112 (6): 064116. https://doi.org/10.1063/1.4754318
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