Ferroelectric effects in individual BaTiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>nanocrystals investigated by electron holography

Szwarcman, Daniel; Lubk, Axel; Linck, Martin; Vogel, Kurt W.; Lereah, Y.; Lichte, Hannes; Markovich, Gil

doi:10.1103/physrevb.85.134112

Cited by 18 publications

(18 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Transmission electron microscopy is a very powerful tool to quantify the domain orientations, and diffraction contrast methods in bright field and dark can be used to determine the walls and the orientational relations between each domain as modeled by Amenlickx and co‐workers 201–203 . Also, electron holography and differential phase imaging allows for the atomic strain and polarizations to be determined 204–209 …”

Section: Hierarchical Domain Structures and Switching In Antiferroelectric Materialsmentioning

confidence: 99%

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

et al. 2021

View full text Add to dashboard Cite

Antiferroelectric (AFE) materials are of great interest owing to their scientific richness and their utility in high-energy density capacitors. Here, the history of AFEs is reviewed, and the characteristics of antiferroelectricity and the phase transition of an AFE material are described. AFEs are energetically close to ferroelectric (FE) phases, and thus both the electric field strength and applied stress (pressure) influence the nature of the transition. With the comparable energetics between the AFE and FE phases, there can be a competition and frustration of these phases, and either incommensurate and/or a glassy (relaxor) structures may be observed. The phase transition in AFEs can also be influenced by the crystal/grain size, particularly at nanometric dimensions, and may be tuned through the formation of solid solutions. There have been extensive studies on the perovskite family of AFE materials, but many other crystal structures host AFE behavior, such as CuBiP 2 Se 6 . AFE applications include DC-link capacitors for power electronics, defibrillator capacitors, pulse power devices, and electromechanical actuators. The paper concludes with a perspective on the future needs and opportunities with respect to discovery, science, and applications of AFE. K E Y W O R D S applications, dielectric materials/properties, ferroelectricity/ferroelectric materials, phase transition F I G U R E 3 Antiferroelectric double hysteresis loops in (A) Pb(Lu 0.5 Nb 0.5 )O 3 and (B) the temperature-dependent critical field in it (replotted from Ref. [30]). (C) shows the phase diagram of PbZrO 3 as a function of temperature and electrical field (replotted from Ref.

show abstract

Section: Hierarchical Domain Structures and Switching In Antiferroelectric Materialsmentioning

confidence: 99%

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The polarization field is then manually added to the specimen potential as an additional linear gradient, giving the freedom to alter the field strength without altering the structure. This both allows us to explore structural effects and field effects independently and constitutes a reasonably realistic description of the effects of screening due to surface charges (the probe electrons being deflected by the net field, which can be greatly influenced by such surface charge distributions [38]). For later reference, the field strengths corresponding to the saturation polarization densities given in Fig.…”

Section: Imaging With An Atomically Fine Probe At Low Magnificationmentioning

confidence: 99%

Low magnification differential phase contrast imaging of electric fields in crystals with fine electron probes

et al. 2016

View full text Add to dashboard Cite

To correlate atomistic structure with longer range electric field distribution within materials, it is necessary to use atomically fine electron probes and specimens in on-axis orientation. However, electric field mapping via low magnification differential phase contrast imaging under these conditions raises challenges: electron scattering tends to reduce the beam deflection due to the electric field strength from what simple models predict, and other effects, most notably crystal mistilt, can lead to asymmetric intensity redistribution in the diffraction pattern which is difficult to distinguish from that produced by long range electric fields. Using electron scattering simulations, we explore the effects of such factors on the reliable interpretation and measurement of electric field distributions. In addition to these limitations of principle, some limitations of practice when seeking to perform such measurements using segmented detector systems are also discussed.

show abstract

“…[72] Studies with electron holography similar to the work of Snoeck et al on ferromagnetic nanocubes have shown evidence of a linear polarization state and external fringing fields, but no evidence of toroidal ordering has yet been uncovered. [58,73] The lack of single-domain vortex states may be attributable to the aforementioned efficient screening of polarization-induced charges by surface adsorbates. It is notable that examples of continuous flux rotation in thin films occurred in films grown on insulating substrates rather than on a more typical metallic SrRuO 3 back electrode that provides effective screening.…”

Section: Toroidal Polarization Statesmentioning

confidence: 99%

Synthesis, physics, and applications of ferroelectric nanomaterials

2015

View full text Add to dashboard Cite

show abstract

Ferroelectric effects in individual BaTiO3nanocrystals investigated by electron holography

Cited by 18 publications

References 41 publications

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

Low magnification differential phase contrast imaging of electric fields in crystals with fine electron probes

Synthesis, physics, and applications of ferroelectric nanomaterials

Contact Info

Product

Resources

About