Realizing strain enhanced dielectric properties in BaTiO3 films by liquid phase assisted growth

Harris, Douglas W.; Burch, Matthew J.; Ihlefeld, Jon F.; Lam, Peter G.; Li, Jing; Dickey, Elizabeth C.; Maria, Jon Paul

doi:10.1063/1.4813270

Cited by 13 publications

(16 citation statements)

References 36 publications

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“…However, the films deposited on rigid substrates exhibit suppressed permittivity (<1500) below and at T C . The sample on sapphire is characterized using surface interdigitated capacitors, probing the in‐plane dielectric properties and resulting in an increase to T C to ~175°C . In contrast, the sample on silicon has a finer grain size, often correlated with T C suppression, and is measured using the typical metal‐insulator‐metal geometry, which probes the out‐of‐plane permittivity.…”

Section: Electrical and Mechanical Boundary Conditionsmentioning

confidence: 99%

“…The sample on sapphire is characterized using surface interdigitated capacitors, probing the inplane dielectric properties and resulting in an increase to T C to~175°C. 104 In contrast, the sample on silicon has a finer grain size, often correlated with T C suppression, and is measured using the typical metal-insulator-metal geometry, which probes the out-of-plane permittivity. Since the film is under tensile stress with a preferred polarization lying in the plane, the applied fields interact with the in-plane polarization only indirectly and is less sensitive to ferroelectric transitions.…”

Section: August 2016mentioning

confidence: 99%

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Scaling Effects in Perovskite Ferroelectrics: Fundamental Limits and Process‐Structure‐Property Relations

et al. 2016

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Ferroelectric materials are well‐suited for a variety of applications because they can offer a combination of high performance and scaled integration. Examples of note include piezoelectrics to transform between electrical and mechanical energies, capacitors used to store charge, electro‐optic devices, and nonvolatile memory storage. Accordingly, they are widely used as sensors, actuators, energy storage, and memory components, ultrasonic devices, and in consumer electronics products. Because these functional properties arise from a noncentrosymmetric crystal structure with spontaneous strain and a permanent electric dipole, the properties depend upon physical and electrical boundary conditions, and consequently, physical dimension. The change in properties with decreasing physical dimension is commonly referred to as a size effect. In thin films, size effects are widely observed, whereas in bulk ceramics, changes in properties from the values of large‐grained specimens is most notable in samples with grain sizes below several micrometers. It is important to note that ferroelectricity typically persists to length scales of about 10 nm, but below this point is often absent. Despite the stability of ferroelectricity for dimensions greater than ~10 nm, the dielectric and piezoelectric coefficients of scaled ferroelectrics are suppressed relative to their bulk counterparts, in some cases by changes up to 80%. The loss of extrinsic contributions (domain and phase boundary motion) to the electromechanical response accounts for much of this suppression. In this article, the current understanding of the underlying mechanisms for this behavior in perovskite ferroelectrics is reviewed. We focus on the intrinsic limits of ferroelectric response, the roles of electrical and mechanical boundary conditions, grain size and thickness effects, and extraneous effects related to processing. In many cases, multiple mechanisms combine to produce the observed scaling effects.

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Section: Electrical and Mechanical Boundary Conditionsmentioning

confidence: 99%

Section: August 2016mentioning

confidence: 99%

Scaling Effects in Perovskite Ferroelectrics: Fundamental Limits and Process‐Structure‐Property Relations

et al. 2016

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“…[37] The BaTiO3 particles, fabricated by hydrothermal synthesis method, are found to be highly dense with the grain size controlled at 200 ~ 400 nm. [38] Kothandan synthesizes spherical BaTiO3 grains via the low temperature hydrothermal technique. The transmission electron microscope (TEM) image shows the diameter of spherical BaTiO3 nanoparticles is around 200 nm, illustrated in Figure 3.…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

Recent development on modification of synthesized barium titanate (BaTiO3) and polymer/BaTiO3 dielectric composites

Zhang

2018

J Mater Sci: Mater Electron

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“…The most prominent and voluminous defects in planar thin film heterostructures are the two interfaces, which not only break the crystal symmetry, but also are accompanied by physical and chemical reconstructions, bound charges, space charges and strains, thereby can determine the characteristics of ferroelectric switching [ 294 ]. Depend on results of high-resolution TEM, local strain field is associated with each dislocation, which arises from the vicinity of a defect core and can be greater than the macroscopic misfit strain [ 295 ]. High defects density may result in overlapping strain fields in neighboring dislocations [ 295 ].…”

Section: Important Phenomena In Ferroelectric Thin Filmsmentioning

confidence: 99%

Ultrathin Ferroelectric Films: Growth, Characterization, Physics and Applications

et al. 2014

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Ultrathin ferroelectric films are of increasing interests these years, owing to the need of device miniaturization and their wide spectrum of appealing properties. Recent advanced deposition methods and characterization techniques have largely broadened the scope of experimental researches of ultrathin ferroelectric films, pushing intensive property study and promising device applications. This review aims to cover state-of-the-art experimental works of ultrathin ferroelectric films, with a comprehensive survey of growth methods, characterization techniques, important phenomena and properties, as well as device applications. The strongest emphasis is on those aspects intimately related to the unique phenomena and physics of ultrathin ferroelectric films. Prospects and challenges of this field also have been highlighted.

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Realizing strain enhanced dielectric properties in BaTiO3 films by liquid phase assisted growth

Abstract: Articles you may be interested inStructural and dielectric properties of laser ablated BaTiO3 films deposited over electrophoretically dispersed CoFe2O4 grains Strong growth orientation dependence of strain relaxation in epitaxial (Ba,Sr)TiO3 films and the resulting dielectric properties

Cited by 13 publications

References 36 publications

Scaling Effects in Perovskite Ferroelectrics: Fundamental Limits and Process‐Structure‐Property Relations

Scaling Effects in Perovskite Ferroelectrics: Fundamental Limits and Process‐Structure‐Property Relations

Recent development on modification of synthesized barium titanate (BaTiO3) and polymer/BaTiO3 dielectric composites

Ultrathin Ferroelectric Films: Growth, Characterization, Physics and Applications

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