TEM Observation on Ferroelectric Domain Structures of PbTiO3 Epitaxial Films

2011 ◽  
Vol 485 ◽  
pp. 179-182
Author(s):  
Kenta Aoyagi ◽  
Takanori Kiguchi ◽  
Yoshitaka Ehara ◽  
Hiroshi Funakubo ◽  
Toyohiko J. Konno
Keyword(s):  
Elastic Interaction ◽  
Epitaxial Films ◽  
Ferroelectric Domain ◽  
Field Energy ◽  
Domain Structures ◽  
Domain Wall Energy ◽  
Transmission Electron ◽  
Ferroelectric Domain Structure ◽  
Energy Domain ◽  
Domain Length

The ferroelectric domain structure of PbTiO3(PTO) films was investigated by using transmission electron microscopy (TEM). In the film with PTO/SrTiO3(STO) structure, 180º domains are formed near the SrTiO3(STO) substrate and the domain length of 180º domains is 100 nm. However, 180º domains are not formed in the film with Pt/PTO/SrRuO3(SRO)/STO structure. These results show that 180º domains are formed in order to minimize depolarizing field energy, and that the domain length of 180º domains is determined by the competition among the depolarizing field energy, domain wall energy, Coulomb interaction and elastic interaction.

Ferroelectric Domain Structures and Piezoelectric Properties of Pb(Zr,Ti)O3 Ceramics

2011 ◽  
Vol 485 ◽  
pp. 3-6
Author(s):  
Naoki Iwaji ◽  
Chiharu Sakaki ◽  
Nobuyuki Wada ◽  
Hiroshi Takagi ◽  
Shigeo Mori
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Phase Boundary ◽  
Piezoelectric Properties ◽  
Ferroelectric Domain ◽  
Strongly Correlated ◽  
Grain Composition ◽  
Pzt Ceramics ◽  
Domain Structures ◽  
Transmission Electron

We investigated domain structures in Pb(Zr,Ti)O3(PZT) ceramics whose composition lies on the morphotropic phase boundary (MPB) using transmission electron microscopy (TEM) and evaluated the piezoelectric properties of PZT. We found that monoclinic nanosized domains (nanodomains), which form in tetragonal domains, strongly correlated with the piezoelectric properties of PZT. The degree of formation of nanodomains depends on the grain composition. Thus, controlling the homogeneity of grain composition in the ceramics is crucial for optimizing the piezoelectric properties of PZT.

Displacement Charge Patterns and Ferroelectric Domain Wall Dynamics Studied by In-Situ Tem

1999 ◽  
Vol 596 ◽  
Author(s):  
A. Krishnan ◽  
M. M. J. Treacy ◽  
M. E. Bisher ◽  
P. Chandra ◽  
P. B. Littlewood
Keyword(s):  
Electric Fields ◽  
Domain Walls ◽  
Energy State ◽  
Ferroelectric Domain ◽  
Potassium Niobate ◽  
In Situ Tem ◽  
Domain Wall Dynamics ◽  
Transmission Electron ◽  
Energy Domain

AbstractWe have observed the growth of domains in ferroelectric barium titanate and potassium niobate using a transmission electron microscope. When domains move in response to electric fields we see a scaling effect where the fine scale domain structure is activated first, followed by larger length-scale patterns. Curvature and tilting of domain walls leads to local uncompensated displacement charge and external fields can interact with these charged walls. In this paper, we posit that the presence of displacement charge on domain walls is important for polarization switching. Charge-neutral domain configurations are in a lower energy state and are harder to switch. We argue that the number of charge-neutral, low energy domain configurations can increase with time. This mechanism provides an intrinsic contribution to ferroelectric fatigue.

Features of the ferroelectric domain structure in the multiferroic material YbMnO3

MRS Advances ◽  
2016 ◽  
Vol 1 (9) ◽  
pp. 591-596
Author(s):  
Takumi Inoshita ◽  
Yasuhide Inoue ◽  
Yoichi Horibe ◽  
Yasumasa Koyama
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Domain Structure ◽  
Ferroelectric Domain ◽  
Multiferroic Material ◽  
Ferroelectric State ◽  
Hexagonal Axis ◽  
Domain Structures ◽  
Transmission Electron ◽  
Domain Boundaries

ABSTRACTThe multiferroic material YbMnO3 has been reported to exhibit both ferroelectric and antiferromagnetic orders in the ground state. Of these two orders, the ferroelectric order is associated with the P63/mmc-to-P63cm structural transition, which occurs around 1270 K. The interesting feature of the ferroelectric state is that a cloverleaf domain structure with a pseudo-six-fold symmetry is observed in transmission electron microscopy images with the beam incidence parallel to the hexagonal axis. To understand the origin of the formation of the cloverleaf domain structure, we have examined the crystallographic features of the ferroelectric state in YbMnO3 by transmission electron microscopy. In this study, particularly, we adopted the experimental condition that electron beam incidences are perpendicular to the hexagonal axis. It was, as a result, found that there existed various ferroelectric domain structures including the cloverleaf domain structure under the present condition. The notable feature of domain structures found in this study is that each domain structure basically consists of six domains, whose domain boundaries are terminated at one point. Because this feature makes us reminiscent of a discommensurate structure in an incommensurate state, we took high-resolution electron micrographs of areas including domain boundaries. Their analysis indicated that a domain boundary could be identified as a discommensuration with a phase slip of π/3. It is thus understood that the cloverleaf domain structure should be one of domain morphologies for a discommensurate structure, which is related to the break of the translational symmetry.

Microstructure-property relations in tungsten bronze lead barium niobate, Pb1−xBaxNb2O6

1991 ◽  
Vol 6 (8) ◽  
pp. 1720-1728 ◽  
Author(s):  
C.A. Randall ◽  
R. Guo ◽  
A.S. Bhalla ◽  
L.E. Cross
Keyword(s):  
Paraelectric Phase ◽  
Structural Phase ◽  
Tungsten Bronze ◽  
Ferroelectric Domain ◽  
Structural Phase Transitions ◽  
Property Relations ◽  
Domain Structures ◽  
Transmission Electron ◽  
Lead Barium Niobate ◽  
Lock In

Transmission electron microscopy (TEM) has been used to explore details of the structural phase transitions and corresponding microstructural features in the solid solution of Pb1−xBaxNb2O6 (PBN) tungsten bronze ferroelectrics at compositions embracing the morphotropic phase boundary between orthorhombic and tetragonal ferroelectric phases. In addition to the ferroelectric domain structures that were consistent with the expected symmetries, incommensurate ferroelastic phases were observed. The “onset” and “lock-in” transition temperatures are a function of the Pb/Ba ratio, and for lead-rich compositions it appears that the incommensurate distortion may occur above the ferroelectric Curie temperature in the paraelectric phase.

TEM Investigation of the Ferroelectric Domain Structure in Sputtered PZT Thin Films

1990 ◽  
Vol 200 ◽  
Author(s):  
J.P. Goral ◽  
Maria Huffman ◽  
M.M. Al-Jassim
Keyword(s):  
Thin Films ◽  
Domain Structure ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Ferroelectric Domain ◽  
Pzt Thin Films ◽  
Transmission Electron ◽  
Ferroelectric Domain Structure ◽  
Ferroelectric Domains ◽  
The Individual

ABSTRACTThe ferroelectric domain structure in sputtered lead zirconate titanate (PZT) thin films has been investigated using transmission electron microscopy (TEM) and transmission electron diffraction (TED). The individual ferroelectric domains occur as {110}-type microtwins as is observed in the bulk ceramic. The arrangement and size of the ferroelectric domains is strongly dependent on the microstructure of the sputtered film.

scholarly journals Time dependence of domain structures in potassium sodium niobate-based piezoelectric ceramics

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20057-20062
Author(s):  
Jia Yang ◽  
Zhipeng Gao ◽  
Yi Liu ◽  
Zhengwei Xiong ◽  
Faqiang Zhang ◽  
...  
Keyword(s):  
Domain Wall ◽  
Time Dependence ◽  
Domain Structure ◽  
Piezoelectric Ceramics ◽  
Ferroelectric Domain ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
Domain Structures ◽  
Ferroelectric Domain Structure

The ferroelectric domain structure of Li-doped (K,Na)NbO3 changed naturally as time passed, and most of the change occurred in the 180° domain wall, while the 60°/120° domains remained nearly unchanged.

scholarly journals Non-Invasive Visualization of Ferroelectric Domain Structures on the Non-Polar y-Surface of KTiOPO4 via Raman Imaging

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1086
Author(s):  
Julian Brockmeier ◽  
Peter Walter Martin Mackwitz ◽  
Michael Rüsing ◽  
Christof Eigner ◽  
Laura Padberg ◽  
...  
Keyword(s):  
Frequency Conversion ◽  
Ferroelectric Domain ◽  
Domain Growth ◽  
Polarization Microscopy ◽  
Precise Control ◽  
Non Invasive ◽  
Domain Structures ◽  
Ferroelectric Domain Structure ◽  
Quasi Phase Matching ◽  
Power Frequency

Potassium titanyl phosphate (KTP) is a nonlinear optical material with applications in high-power frequency conversion or quasi-phase matching in submicron period domain grids. A prerequisite for these applications is a precise control and understanding of the poling mechanisms to enable the fabrication of high-grade domain grids. In contrast to the widely used material lithium niobate, the domain growth in KTP is less studied, because many standard methods, such as selective etching or polarization microscopy, provides less insight or are not applicable on non-polar surfaces, respectively. In this work, we present results of confocal Raman-spectroscopy of the ferroelectric domain structure in KTP. This analytical method allows for the visualization of domain grids of the non-polar KTP y-face and therefore more insight into the domain-growth and -structure in KTP, which can be used for improved domain fabrication.

Nucleation of Disorder in Fe3Al Alloys

1967 ◽  
Vol 25 ◽  
pp. 312-313
Author(s):  
P. R. Swann ◽  
W. R. Duff ◽  
R. M. Fisher
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Annealing Temperature ◽  
Antiphase Domain ◽  
Effect Of Temperature ◽  
Domain Structures ◽  
Transmission Electron ◽  
Domain Boundaries ◽  
Higher Temperature ◽  
The One

Recently we have investigated the phase equilibria and antiphase domain structures of Fe-Al alloys containing from 18 to 50 at.% Al by transmission electron microscopy and Mössbauer techniques. This study has revealed that none of the published phase diagrams are correct, although the one proposed by Rimlinger agrees most closely with our results to be published separately. In this paper observations by transmission electron microscopy relating to the nucleation of disorder in Fe-24% Al will be described. Figure 1 shows the structure after heating this alloy to 776.6°C and quenching. The white areas are B2 micro-domains corresponding to regions of disorder which form at the annealing temperature and re-order during the quench. By examining specimens heated in a temperature gradient of 2°C/cm it is possible to determine the effect of temperature on the disordering reaction very precisely. It was found that disorder begins at existing antiphase domain boundaries but that at a slightly higher temperature (1°C) it also occurs by homogeneous nucleation within the domains. A small (∼ .01°C) further increase in temperature caused these micro-domains to completely fill the specimen.

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