Estimation of steady-state leakage current in polycrystalline PZT thin films | Zendy

Yury Podgorny | Zendy; К. А. Воротилов | Zendy; А. С. Сигов | Zendy

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Estimation of steady-state leakage current in polycrystalline PZT thin films

Author(s) -

Yury Podgorny,

К. А. Воротилов,

А. С. Сигов

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4964147

Subject(s) - ferroelectricity , crystallite , curie temperature , materials science , voltage , condensed matter physics , leakage (economics) , relaxation (psychology) , current (fluid) , thermodynamics , electrical engineering , physics , optoelectronics , dielectric , metallurgy , engineering , psychology , social psychology , ferromagnetism , economics , macroeconomics

Estimation of the steady state (or “true”) leakage current Js in polycrystalline ferroelectric PZT films with the use of the voltage-step technique is discussed. Curie-von Schweidler (CvS) and sum of exponents (Σexp) models are studied for current-time J (t) data fitting. Σexp model (sum of three or two exponents) gives better fitting characteristics and provides good accuracy of Js estimation at reduced measurement time thus making possible to avoid film degradation, whereas CvS model is very sensitive to both start and finish time points and give in many cases incorrect results. The results give rise to suggest an existence of low-frequency relaxation processes in PZT films with characteristic duration of tens and hundreds of seconds

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