Reversible electric field-induced structure changes in the near-surface region of strontium titanate

被引：14

作者：

Bobeth, Manfred ^{[1
]}

Farag, Nayel

Levin, Alexander A.

Meyer, Dirk C.

Pompe, Wolfgang

Romanov, Alexei E.

机构：

[1] Tech Univ Dresden, Inst Werkstoffwissensch, D-01062 Dresden, Germany

[2] Tech Univ Dresden, Inst Strukt Phys, D-01062 Dresden, Germany

[3] Russian Acad Sci, AF Ioffe Physicotech Inst, RU-194021 St Petersburg, Russia

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2006年 / 114卷 / 1335期

关键词：

field-induced lattice distortions; x-ray analysis; strontium titanate; pipe diffusion; dislocation climb; stacking faults; Ruddlesden-Popper phase;

D O I：

10.2109/jcersj.114.1029

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

X-ray analysis of the near-surface region of as-cut single-crystalline strontium titanate (001) wafers showed a reversible electric field-induced structure change at room temperature. To explain this phenomenon, a model is proposed which is based on the field-driven diffusional transport of oxygen and strontium along dislocation cores to the near-surface region and the growth of monolayer SrO precipitates by dislocation climb. Precipitate growth causes a lateral compressive stress in the near-surface region, which counteracts the diffusion of oxygen and strontium to the surface. By estimating the change of the Gibbs free energy due to precipitate formation, the lateral precipitate size and the resulting mean strain in the near-surface region is analyzed.

引用

页码：1029 / 1037

页数：9

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