Modelling of Needle Domains in Barium Titanate Single Crystals Using Dislocation Theory

2012 ◽  
Author(s):  
Dan Sui ◽  
John E. Huber
Keyword(s):  
Barium Titanate ◽  
Total Energy ◽  
Experimental Evidence ◽  
Single Crystals ◽  
Electric Fields ◽  
Edge Dislocation ◽  
Dislocation Theory ◽  
Piezoelectric Media ◽  
Piezoelectric Body ◽  
Lattice Friction

A model is established to study needle domains in barium titanate single crystals using the theory of dislocations. Considering the mechanical and electrical compatibility in ferroelectrics, the fields produced by a needle domain are represented using the equivalent fields due to an effective edge dislocation coupled with a line charge. Accordingly, the dislocation fields derived by Barnett and Lothe for anisotropic piezoelectric media are used to analyze the stress and electric fields around needle domains. The interaction of the pairs of needle domains in an infinite piezoelectric body is studied by computing the interactive force and the total energy. It is found that the needle tip interactions tend to be dominated by the electrostatic terms. Additionally, comb-like arrays of needle domains are investigated. Stable configurations of needle domains in a herringbone pattern are identified, consistent with experimental evidence. However, comb-like arrays of needles are found to be unstable if perfectly insulating conditions without lattice friction are assumed.

Nonlinear Behavior of Barium Titanate Single Crystals in Strong Electric Fields

2003 ◽  
Vol 286 (1) ◽  
pp. 73-78 ◽  
Author(s):  
I. N. Leontiev ◽  
A. Leyderman ◽  
V. Yu. Topolov ◽  
O. E. Fesenko
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Electric Fields ◽  
Nonlinear Behavior ◽  
Strong Electric Fields

Electromechanical Poling Treatment of Barium Titanate Single Crystals and their Piezoelectric Properties

2007 ◽  
Vol 350 ◽  
pp. 73-76
Author(s):  
Tomomitsu Muraishi ◽  
Keisuke Yokoh ◽  
Hirofumi Kakemoto ◽  
Takaaki Tsurumi ◽  
Satoshi Wada
Keyword(s):  
Phase Transition ◽  
Barium Titanate ◽  
Single Crystals ◽  
Electric Fields ◽  
Piezoelectric Properties ◽  
Uniaxial Stress ◽  
Notation System

The phase transition behaviors of the [111]c oriented barium titanate (BaTiO3) single crystals (the subscript c means the cubic notation system) were investigated as functions of temperature, uniaxial stress and electric fields. These results suggested that above Tc, combination between uniaxial stress and electric fields might be effective for a poling treatment of BaTiO3 single crystals. Thus, a new poling method for BaTiO3 single crystals was proposed using control of temperature, uniaxial stress and electric fields in this study.

Development of Lead-Free Piezoelectric Materials Using Domain Wall Engineering

2006 ◽  
Vol 320 ◽  
pp. 151-154
Author(s):  
Satoshi Wada ◽  
Koichi Yako ◽  
Tomomitsu Muraishi ◽  
Hirofumi Kakemoto ◽  
Takaaki Tsurumi
Keyword(s):  
Barium Titanate ◽  
Domain Wall ◽  
Electric Field ◽  
Single Crystals ◽  
Electric Fields ◽  
Applied Electric Field ◽  
Piezoelectric Materials ◽  
Domain Size ◽  
Lead Free ◽  
Gradient Domain

For the [111] oriented barium titanate (BaTiO3) single crystals, the patterning electrode was applied to induce the finer engineered domain configurations with domain size of 3 2m. The poling treatment was performed at 134 °C under electric fields below 6 kV/cm to inhibit the burning of the patterning electrode with photoresist. As the results, the gradient domain sizes from 3 to 8-9 2m were induced into the 31 resonator. The d31 was measured at -243.2 pC/N, and this value was almost 70 % of the expected d31 of –337.7 pC/N for the resonator with domain size of 3 2m. This difference was originated from lower applied electric field below 6 kV/cm. However, this study was revealed that the patterning electrode was very powerful tool to induce much finer domain sizes below 5 2m.

X-ray photoelectron spectroscopy characterization of barium titanate ceramics prepared by the citric route. Residual carbon study

1997 ◽  
Vol 12 (9) ◽  
pp. 2388-2392 ◽  
Author(s):  
C. Miot ◽  
E. Husson ◽  
C. Proust ◽  
R. Erre ◽  
J. P. Coutures
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Photoelectron Spectroscopy ◽  
Residual Carbon ◽  
Ion Etching ◽  
Xps Spectra ◽  
X Ray ◽  
Titanate Ceramics

Powder and ceramics of barium titanate prepared by the citric process were studied by x-ray photoelectron spectroscopy (XPS). Spectra of C1s, O1s, Ti2p, Ba3d, and Ba4d levels are analyzed in powder and ceramics immediately after the sintering step and after several months of exposure in the air. Ar-ion etching allowed one to characterize the material intrinsic carbon. The results are discussed in comparison with works previously published on oxide single crystals.

scholarly journals Precursor Phenomena of Barium Titanate Single Crystals Grown Using a Solid-State Single Crystal Growth Method Studied with Inelastic Brillouin Light Scattering and Birefringence Measurements

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3171 ◽  
Author(s):  
Soo Han Oh ◽  
Jae-Hyeon Ko ◽  
Ho-Yong Lee ◽  
Iwona Lazar ◽  
Krystian Roleder
Keyword(s):  
Crystal Growth ◽  
Solid State ◽  
Barium Titanate ◽  
Single Crystal ◽  
Single Crystals ◽  
Melting Process ◽  
Point Of View ◽  
Crystal Quality ◽  
Cubic Phase ◽  
Growth Method

The nature of precursor phenomena in the paraelectric phase of ferroelectrics is one of the main questions to be resolved from a fundamental point of view. Barium titanate (BaTiO3) is one of the most representative perovskite-structured ferroelectrics intensively studied until now. The pretransitional behavior of BaTiO3 single crystal grown using a solid-state crystal growth (SSCG) method was investigated for the first time and compared to previous results. There is no melting process in the SSCG method, thus the crystal grown using a SSCG method have inherent higher levels of impurity and defect concentrations, which is a good candidate for investigating the effect of crystal quality on the precursor phenomena. The acoustic, dielectric, and piezoelectric properties, as well as birefringence, of the SSCG-grown BaTiO3 were examined over a wide temperature range. Especially, the acoustic phonon behavior was investigated in terms of Brillouin spectroscopy, which is a complementary technique to Raman spectroscopy. The obtained precursor anomalies of the SSCG-grown BaTiO3 in the cubic phase were similar to those of other single crystals, in particular, of high-quality single crystal grown by top-seeded solution growth method. These results clearly indicate that the observed precursor phenomena are common and intrinsic effect irrespective of the crystal quality.

scholarly journals Twinning in Czochralski-Grown 36°-RY LiTaO3 Single Crystals

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1009
Author(s):  
Yutaka Ohno ◽  
Yuta Kubouchi ◽  
Hideto Yoshida ◽  
Toshio Kochiya ◽  
Tomio Kajigaya
Keyword(s):  
Single Crystals ◽  
Slip Plane ◽  
Edge Dislocation ◽  
Lithium Tantalate ◽  
Initiation Site ◽  
The Other ◽  
Burgers Vector ◽  
Partial Dislocations ◽  
Dislocation Arrays ◽  
Extension Direction

The origin of twinning during the Czochralski (CZ) growth of 36°-RY lithium tantalate (LiTaO3) single crystals is examined, and it is shown that lineages composed of dislocation arrays act as an initiation site for twinning. Two types of lineages expand roughly along three different {12¯10} planes and two different {11¯00} planes. The former lineages and some latter lineages are composed of two types of mixed-dislocations with different Burgers vectors, while the other lineages are composed of only one type of edge-dislocation. All the dislocations have the Burgers vector of ⟨12¯10⟩ type with the compression side at the +Z side. Twin lamellae on {101¯2} are generated at a lineage during the CZ growth. We have hypothesized that dislocations in the lineage with b = 1/3⟨12¯10⟩ change their extension direction along a slip plane of {101¯2}, and they dissociate into pairs of partial dislocations with b = 1/6⟨22¯01⟩and 1/6⟨02¯21¯⟩ forming twin lamellae on {101¯2}.

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