Determination of intrinsic ferroelectric polarization in lossy improper ferroelectric systems

Abstract

We measured the intrinsic hysteretic polarization in lossy improper and nanoferroelectric systems where the nonhysteretic polarization and leakage are large and the relaxation takes place over a broader time scale. We used different measurement protocols such as standard single triangular voltage pulse, a pulse train of PUND (Positive Up Negative Down), and an even more complicated pulse train of fourteen voltage pulses and compared the results obtained. We show that a protocol which sends a train of fourteen pulses is more appropriate for extracting relaxed (i.e., time scale independent) and intrinsic remanent polarization for these samples. We also point out that it is possible to select and design an appropriate measurement protocol depending on the magnitude of polarization and leakage of the system.

5 pages, 6 figures, published in Appl. Phys. Lett

References in corpus (5)

• Domain Switching Kinetics in Disordered Ferroelectric Thin Films
• Multiferroic Iron Oxide Thin Films at Room-Temperature
• Polarization Switching Dynamics Governed by Thermodynamic Nucleation Process in Ultrathin Ferroelectric Films
• Ferroelectric properties of charge-ordered alpha-(BEDT-TTF)2I3
• Stability of 71° stripe domains in epitaxial BiFeO3 films upon repeated electrical switching

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• Nonmonotonic magnetic field dependence of remanent ferroelectric polarization in reduced-graphene-oxide-BiFeO${}_3$ nanocomposite
• Wafer scale reactive sputtering of highly oriented and ferroelectric Al${}_{0.6}$Sc${}_{0.4}$N from 300 mm AlSc Targets