Indentation plasticity of barium titanate single crystals: Dislocation influence on ferroelectric domain walls

2006 ◽  
Vol 54 (17) ◽  
pp. 4525-4531 ◽  
Author(s):  
D. Liu ◽  
M. Chelf ◽  
K.W. White
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Domain Walls ◽  
Ferroelectric Domain

In situ observation of the motion of ferroelectric domain walls in Bi4Ti3O12 single crystals

2016 ◽  
Vol 49 (5) ◽  
pp. 1645-1652 ◽  
Author(s):  
Wanneng Ye ◽  
Lingli Tang ◽  
Chaojing Lu ◽  
Huabing Li ◽  
Yichun Zhou
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Single Crystals ◽  
Transmission Electron Microscope ◽  
Domain Walls ◽  
Domain Switching ◽  
Ferroelectric Domain ◽  
In Situ Observation ◽  
Transmission Electron

Five types of ferroelectric domain walls (DWs) are present in Bi4Ti3O12 single crystals (Ye et al., 2015). Here their motion was investigated in situ using transmission electron microscopy and optical microscopy. The motion of P (a)-90° DWs, P (a)-180° DWs and P (c)-180° DWs was observed through electron beam poling in a transmission electron microscope. The growth of new P s(a)-180° nanodomains was frequently seen and they tended to nucleate at preexisting P s(a)-90° DWs. Irregularly curved P (c)-180° DWs exhibit the highest mobility, while migration over a short range occurs occasionally for faceted P s(a)-90° DWs. In addition, the motion of P s(a)-90° DWs and the growth/annihilation of new needle-like P s(a)-90° domains in a 20 µm-thick crystal were observed under an external electric field on an optical microscope. Most of the new needle-like P s(a)-90° domains nucleate at preexisting P s(a)-90° DWs and the former are much smaller than the latter. This is very similar to the situation for P s(a)-180° domain switching induced by electron beam poling in a transmission electron microscope. Our observations suggest the energy hierarchy for different domains of P s(c)-180° ≤ P s(a)-180° ≤ P s(a)-90° ≤ new needle-like P s(a)-90° in ferroelectric Bi4Ti3O12.

scholarly journals Ferroelectric domain pattern in barium titanate single crystals studied by means of digital holographic microscopy

2016 ◽  
Vol 49 (25) ◽  
pp. 255307 ◽  
Author(s):  
Pavel Mokrý ◽  
Pavel Psota ◽  
Kateřina Steiger ◽  
Jan Václavík ◽  
Roman Doleček ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Ferroelectric Domain ◽  
Digital Holographic Microscopy ◽  
Domain Pattern ◽  
Holographic Microscopy

HREM study of ferroelectric domain wall in barium titanate

1994 ◽  
Vol 52 ◽  
pp. 566-567
Author(s):  
Laurent. Normand ◽  
Alain. Thorel ◽  
Yvan. Montardi
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Barium Titanate ◽  
Domain Walls ◽  
Ferroelectric Phase ◽  
Ferroelectric Domain ◽  
Transmission Electron ◽  
The One

This study focuses on High Resolution Transmission Electron Microscopy of barium titanate in its tetragonal ferroelectric phase, and especially on the structure of domain walls. This phase is stable between about 0 °C and 130 °C. During cooling, at 130 °C barium titanate changes from a cubic parraelectric phase to a tetragonal ferroelectric phase. In this phase the spontaneous polarisation is along one of the six [001] pseudo-cubic directions. Two types of domains can be formed during the phase transition :90° and 180° domains. In 90° domains the polarisation is at 90° from the polarisation of the next domain (exactly 2* ArcTan(a/c) if a and c are the lattice parameters). For these domains the domain walls are <110< type planes ; In 180° domains the polarisation is at 180° from the one in the next domain. 180° domain walls are <100< type plane and are assumed to be purely ferroelectric.

scholarly journals Study of the Structure of Ferroelectric Domain Walls in Barium Titanate Ceramics

1996 ◽  
Vol 207-209 ◽  
pp. 317-320 ◽  
Author(s):  
L. Normand ◽  
R. Kilaas ◽  
Y. Montardi ◽  
A. Thorel
Keyword(s):  
Barium Titanate ◽  
Domain Walls ◽  
Ferroelectric Domain ◽  
Titanate Ceramics

scholarly journals Effect of mechanical stresses on the domain structure of barium titanate single crystals

2020 ◽  
Vol 8 (4) ◽  
pp. 66-78
Author(s):  
V. V. Borodina ◽  
S. O. Kramarov
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Domain Structure ◽  
Oxygen Vacancies ◽  
Domain Walls ◽  
Domain Switching ◽  
Mechanical Load ◽  
Ferroelectric Properties ◽  
Mechanical Stresses ◽  
The Impact

This review article summarizes the material of years of research on the impact of mechanical stresses on the domain structure of multiaxhetoelectrics using the example of barium titanium monocrystals. Since the discovery of the ferroelectric properties of barium titanate in 1944, this material has been the subject of comprehensive investigation as the first practically important and perhaps the most famous ferroelectric. The domain structure of barium titanate is sensitive to mechanical stresses arising both from simple uniaxial compression and from point impacts by local mechanical loading. Mechanical stress applied to a ferroelectric crystal may have a significant effect on dielectric and piezoelectric properties. In particular, 90-degree domain switching is possible under the influence of stresses. The most interesting experimental results are obtained in the study of elastoplastic processes in BaTiO 3 originating from local mechanical stresses. The following features are found and studied: development of strained region around the point of application of the load; “internal” 90-degree domain that does not extend to the crystal surfaces and does not close upon other domains; the growth of 90-degree domains under the influence of residual mechanical stresses; growth of cracks along charged 90-degree domain walls. The notions of “ferroplastic effect” (crystal deformation due to the formation of 90-degree ferroelectric domains) and “ferromechanical effect” (crack formation and growth along charged 90-degree domain walls) are introduced. The hypothesis of a significant role of oxygen vacancies in the processes of 90-degree domain reorientation was put forward and experimentally confirmed. In particular, an increase in the concentration of oxygen vacancies by reducing annealing of barium titanate single crystals creates more favorable conditions for the appearance of an "internal" 90-degree domain under local mechanical load. The study of the mechanisms governing the formation of a domain structure in ferroelectric crystals remains an important problem of modern materials science.

scholarly journals Giant photovoltaic effect of ferroelectric domain walls in perovskite single crystals

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Ryotaro Inoue ◽  
Shotaro Ishikawa ◽  
Ryota Imura ◽  
Yuuki Kitanaka ◽  
Takeshi Oguchi ◽  
...  
Keyword(s):  
Single Crystals ◽  
Domain Walls ◽  
Photovoltaic Effect ◽  
Ferroelectric Domain
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