Constrained ferroelectricity in the (001)-textured superlattices of PbZrO3∕BaZrO3

Wu, Tai–Bor; Hung, Cheng-Lung

doi:10.1063/1.1873048

Cited by 14 publications

(5 citation statements)

References 27 publications

(15 reference statements)

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“…Epitaxial perovskite-type multilayers such as PbZrO 3 / BaZrO 3 , PbTiO 3 / PbZrO 3 , BaTiO 3 / SrTiO 3 , SrTiO 3 / BaZrO 3 , or Pb͑Zr x Ti 1−x ͒O 3 /Pb͑Zr y Ti 1−y ͒O 3 , represent a class of interesting systems with enhanced ferroelectric or dielectric properties. [1][2][3][4][5][6][7][8] Strain and coupling effects between individual layers can result in qualitatively new properties. 1,[8][9][10][11] For example, Kanno et al 3 reported that the dielectric constant of PbZrO 3 / PbTiO 3 epitaxial multilayers increases with decreasing thickness of the component layers for the same total thickness of the structure.…”

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confidence: 99%

Thickness-driven antiferroelectric-to-ferroelectric phase transition of thin PbZrO3 layers in epitaxial PbZrO3∕Pb(Zr0.8Ti0.2)O3 multilayers

Boldyreva

Pintilie

Lotnyk

et al. 2007

Applied Physics Letters

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Epitaxial antiferroelectric/ferroelectric PbZrO 3 / PbZr 0.8 Ti 0.2 O 3 multilayers were grown on SrRuO 3-electroded SrTiO 3 ͑100͒ substrates by pulsed laser deposition. Polarization-field and switching current-voltage curves show a mixed antiferroelectric-ferroelectric behavior of the multilayers with an individual layer thickness above 10 nm, whereas below 10 nm the multilayers show only ferroelectric behavior. Clearly the PbZrO 3 layers thinner than 10 nm experienced a transition into the ferroelectric state. X-ray diffraction reciprocal space mapping showed a corresponding orthorhombic-to-rhombohedral transition of the PbZrO 3 layers. The observations are discussed in terms of the influence of strain.

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confidence: 99%

Thickness-driven antiferroelectric-to-ferroelectric phase transition of thin PbZrO3 layers in epitaxial PbZrO3∕Pb(Zr0.8Ti0.2)O3 multilayers

Boldyreva

Pintilie

Lotnyk

et al. 2007

Applied Physics Letters

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“…7,8 Many of the reports regarding ferroelectric heterostructures deal, however, with nonepitaxial thin films. The superlattices were subjected to structural characterization by means of ͑high-resolution͒ transmission electron microscopy and x-ray diffraction, to piezoelectric-force microscopy, and to macroscopic ferroelectric measurements.…”

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confidence: 99%

Structure and properties of epitaxial ferroelectric PbZr0.4Ti0.6O3∕PbZr0.6Ti0.4O3 superlattices grown on SrTiO3 (001) by pulsed laser deposition

Vrejoiu

Zhu

Rhun

et al. 2007

Applied Physics Letters

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Ferroelectric epitaxial superlattices combining PbZr0.4Ti0.6O3 and PbZr0.6Ti0.4O3 ultrathin films were grown by pulsed laser deposition onto vicinal SrTiO3 (001) substrates. The superlattices were subjected to structural characterization by means of (high-resolution) transmission electron microscopy and x-ray diffraction, to piezoelectric-force microscopy, and to macroscopic ferroelectric measurements. The thickness of the individual PbZrxTi1−xO3 layers was found to play an important role in the overall structure adopted by the superlattices. Superlattices consisting of 22 bilayers of 5nm thin PbZr0.4Ti0.6O3 layers and 3nm thin PbZr0.6Ti0.4O3 layers involve continuous 90° a–c domains, indicating a uniform tetragonal structure.

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“…Superlattices, including BaTiO3/SrTiO3 [1], PbTiO3/PbZrO3 [2][3], PbTiO3/BaTiO3 [4][5], PbZrO3/BaZrO3 [6][7],PbTiO3/SrTiO3 [8] and LaAlO3/SrTiO3 [9] have been well researched in previous work. Firstprinciples calculations were extensively used to investigate interesting properties and design new ferroelectric material before experimental work is performed.…”

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confidence: 99%

First-principles Study of Unusual Behavior in PbTiO3/KTaO3 Superlattice

Zhu¹,

Wang²,

Lü³

2017

dteees

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Abstract. Ferroelectric superlattices have attracted wide attentions and become a research focus due to excellent performance. In order to investigate the effects of polar discontinuity on properties of superlattices. The polarization behavior of PbTiO3/KTaO3 (PKT) superlattices are studied by first-principles calculation in this paper. It is found that the polarization of local layer in PKT superlattices does not keep a constant value through each superlattice and the directions of polarizations of each local layer are all the same, because the residual plane charges in TaO2/PbO and TiO2/KO interfaces provide mask effect. Furthermore, polarization of (PbTiO3)m/(KTaO3)n superlattices decreases as m/n decreasing, (PbTiO3)n/(KTaO3)n superlattices show declining polarization and become more and more conductive with the increase of n. IntroductionRecently, ferroelectric superlattices have attracted lots of attentions due to their perfect properties and have more potential in the application of miniature devices. Superlattices, includingand LaAlO3/SrTiO3 [9] have been well researched in previous work. Firstprinciples calculations were extensively used to investigate interesting properties and design new ferroelectric material before experimental work is performed.Pentcheva and Pickett[10] revealed the compensation mechanisms in the LaAlO3/SrTiO3 system. The electron-doped n-type interface with an LaO layer next to a TiO2 layer and the hole-doped ptype interface where an SrO layer lies next to an AlO2 layer are two distinct types of interfaces. It reported that the unusually high carrier density is rather related to the formation of oxygen vacancies during the deposition process, and it is interesting that the n-type interface between these two band insulators is conducting, while the p-type interface was reported to be insulating. Polar discontinuity, as introduced by Wu and Vanderbilt[11], implied that head-to-head (HH) and tail-to-tail (TT) domain walls were induced to form a ferroelectric superlattice via the insertion of compensating "delta doping" layers. Generally a HH or TT domain wall is perpendicular to the polarization direction, and their formation would need an unacceptable Coulomb energy cost or induce the domain wall to become metallic so that the free carriers could compensate the domain wall. However, it was shown that the delta-doping layers could be arranged to compensate the polarization bound charge, allowing a structure where the ferroelectric domains are polarized in opposite directions and separated by HH and TT domain walls. This kind of superlattice with polar discontinuity was proved to be a promising new material with interesting properties. Das [12]found that systems containing polar discontinuities especially for ultra-thin superlattices have strongly broken inversion symmetry and possessed large nonswitchable polarization.In this study, the effect of polar discontinuity on the polarization of a series of period-5 superlattices PKT and cycle stack superlattice (PbTiO3)n/(KTaO3)n is invest...

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Constrained ferroelectricity in the (001)-textured superlattices of PbZrO3∕BaZrO3

Cited by 14 publications

References 27 publications

Thickness-driven antiferroelectric-to-ferroelectric phase transition of thin PbZrO3 layers in epitaxial PbZrO3∕Pb(Zr0.8Ti0.2)O3 multilayers

Thickness-driven antiferroelectric-to-ferroelectric phase transition of thin PbZrO3 layers in epitaxial PbZrO3∕Pb(Zr0.8Ti0.2)O3 multilayers

Structure and properties of epitaxial ferroelectric PbZr0.4Ti0.6O3∕PbZr0.6Ti0.4O3 superlattices grown on SrTiO3 (001) by pulsed laser deposition

First-principles Study of Unusual Behavior in PbTiO3/KTaO3 Superlattice

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