Direct Evidence for Cation Non-Stoichiometry and Cottrell Atmospheres Around Dislocation Cores in Functional Oxide Interfaces

被引：57

作者：

Arredondo, Miryam ^{[1
]}

Ramasse, Quentin M. ^{[2
]}

Weyland, Matthew ^{[3
]}

Mahjoub, Reza ^{[1
]}

Vrejoiu, Ionela ^{[4
]}

Hesse, Dietrich ^{[4
]}

Browning, Nigel D. ^{[5
,6
]}

Alexe, Mann ^{[4
]}

Munroe, Paul ^{[1
]}

Nagarajan, Valanoor ^{[1
]}

机构：

[1] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94708 USA

[3] Monash Univ, Monash Ctr Electron Microscopy, Clayton, Vic 3800, Australia

[4] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[5] Univ Calif Davis, Dept Chem Engn & Mat Sci, Dept Mol & Cellular Biol, Davis, CA 95616 USA

[6] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA

来源：

ADVANCED MATERIALS | 2010年 / 22卷 / 22期

关键词：

MISFIT DISLOCATIONS; GRAIN-BOUNDARIES; ATOMS; FILM;

D O I：

10.1002/adma.200903631

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Long-range strain fields associated with dislocation cores at an oxide interface are shown to be sufficient enough to create significant variations in the chemical composition around the core (Cottrell atmospheres). Such stress-assisted diffusion of cations towards the cores is proposed to significantly impact the properties of nanoscale functional devices. The figure shows a Z-contrast image of a single dislocation core at an oxide interface.

引用

页码：2430 / +

页数：6

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