The phenomenological theory of barium titanate given in an earlier paper has been extended, and expressions obtained for the piezoelectric constants, elastic coefficients for constant field and dielectric constants for constant strain in terms of other physical constants of the material. Curves are drawn...
XCVI. Theory of barium titanate 来自 Semantic Scholar 喜欢 0 阅读量: 186 作者: A.F. Devonshire 摘要: The theory of the dielectric and crystallographic properties of barium titanate is considered. By expanding the free energy as a function of polarization and strain and making reasonable ...
[World Scientific Series in 20th Century Physics] A Career in Theoretical Physics Volume 35 || Theory of Ferroelectric Behavior of Barium TitanateThis is my first review paper — a forerunner of the "soft mode" paper of 1958. Bill Shockley hired me at Bell to work on his ideas on ...
We demonstrate the theory by studying oxygen vacancies in barium titanate. We find the formation of depletion layers, regions of depleted electrons, and a large electric field at the ferroelectric鈥揺lectrode boundary. We also find the formation of a charge double layer and a large electric ...
He studied the case of barium titanate in more detail, extending the model to three-dimensions, showing why the phase transitions between the lower symmetry phases occur, and demonstrating how a complete set of the polynomial coefficients...
摘要: Anomalous high permittivity in fine-grained barium titanate, which has recently been explained by an internal stress model, can also be explained by an internal field model and phenomenological theory, although the existence of the field in the fine-grained sintered ceramic is uncertain....
This image shows the positions of atoms in a ferroelectric-like metal that contains barium titanate, strontium titanate and lanthanum titanate. (Source: Zhen Wang and Yimei Zhu; image obtained at Brookhaven National Laboratory) In 1965, Princeton University researcher Philip W. Anderson th...
Weinreich, "Mechanism for the sidewise motion of 180 domain walls in barium titanate" Phys. Rev. 117, 1460 (1960). 38 E. V. Burtsev and S. P. Chervonobrodov, " Some problems of 180°-switching in ferroelectrics " Ferroelectrics 45, 97 (1982). 39 Y. H. Shin, I. Grinberg, I. ...
We report structural, dielectric and ferroelectric properties of sodium bismuth titanate–barium titanate, 0.94 Na 0.5Bi 0.5TiO 3–0.06 BaTiO 3, thin films... N Scarisoreanu,F Craciun,V Ion,... - 《Applied Surface Science》 被引量: 62发表: 2007年 Leakage current of Al- or Nb-doped Ba...
This work extended the range of material properties by fabricating the BaTiO3 /PVDF composite. In order to obtain the 0-3 composite without the interconnectivity of the ceramic powders, a low volume fractionof 0.3 of barium titanate (BaTiO3) was filled in a matrix of polyvinylidene fluoride (...