Crystal structure and ferroelectric properties of Si added SrBi2Ta2O9

被引：9
作者：
Idemoto, Y
Takahashi, T
Koura, N
Loong, CK
机构：
[1] Tokyo Univ Sci, Fac Sci & Technol, Dept Pure & Appl Chem, Noda, Chiba 2788510, Japan
[2] Argonne Natl Lab, Intense Pulse Neutron Source Div, Argonne, IL 60439 USA
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 6A期
关键词：
ferroelectric; crystal structure; bismuth silicate; neutron diffraction analysis; Bi layer compound;
D O I：
10.1143/JJAP.45.5091
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigated a series of bulk, ceramic samples of Si-added bismuth la alloying SrBi2Ta2O9 with Bi2SiO5 or Bi4Si3O12 using a solid-state reaction method. X-ray and neutron powder diffraction were carried out to determine the crystal structures. Structural information is correlated with the measured data of the ferroelectric properties. We find that remanent polarization and coercive electric field increase with the addition of Bi2SiO5 or Bi4Si3O12 in SrBi2Ta2O9. The dielectric constants of SBTS increase markedly with increasing temperature. It is found that the ferroelectric behavior is related to the distortion and tilting of the TaO6 octahedron that are effected by variations in Bi and Si contents, respectively, in the SBTS samples.
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页码：5091 / 5097
页数：7
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