Effect of ferroelectric polarization on current response of PZT thin films
1995; Taylor & Francis; Volume: 10; Issue: 1-4 Linguagem: Inglês
10.1080/10584589508012276
ISSN1607-8489
AutoresA. K. Tagantsev, Andréi L. Kholkin, Enrico Colla, Keith G. Brooks, N. Setter,
Tópico(s)Acoustic Wave Resonator Technologies
ResumoAbstract A strong influence of ferroelectric polarization on d.c. conduction has been observed in PZT thin films with Pt electrodes. It is shown that the current-voltage response taken for measuring times of hundreds of seconds at room temperature is controlled by the crossover from the transient to steady-state conduction regime. In the transient regime the current flowing against the initial direction of the ferroelectric polarization is higher than that flowing in the reverse direction. In the steady-state regime a current asymmetry of the opposite sense is observed. At elevated temperatures (150–200°C) the asymmetry in both regimes is strongly suppressed. A Maxwell-Wagner relaxation model with ferroelectric and non-ferroelectric capacitors can qualitatively explain the observed phenomena.
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