A new mechanism for misfit dislocation generation: Superdislocations associated with Ruddlesden-Popper planar defects

J. S. Wu; C. L. Jia; K. Urban; Jianhua Hao; X. X. Xi

doi:10.1016/S0022-0248(01)01734-1

A new mechanism for misfit dislocation generation: Superdislocations associated with Ruddlesden-Popper planar defects

J. S. Wu, C. L. Jia, K. Urban, Jianhua Hao, X. X. Xi

Research output: Journal article publication › Journal article › Academic research › peer-review

19 Citations (Scopus)

Abstract

We have investigated by high-resolution transmission electron microscopy SrTiO3/SrRuO3bilayer films epitaxially grown on LaAlO3substrate. At the SrRuO3/LaAlO3interface we frequently observe dissociated superdislocations in connection with Ruddlesden-Popper-type planar defects. These superdislocations can contribute to misfit relaxation equivalent to a perfect misfit dislocation with Burgers vector a〈110〉. The formation and the geometry of this defect arrangement is discussed in detail. The Sr-rich Ruddlesden-Popper-defect can be introduced by composition fluctuations during film deposition. It can be concluded that it can act as a source for the generation of misfit dislocations.

Original language	English
Pages (from-to)	603-609
Number of pages	7
Journal	Journal of Crystal Growth
Volume	234
Issue number	2-3
DOIs	https://doi.org/10.1016/S0022-0248(01)01734-1
Publication status	Published - 1 Jan 2002
Externally published	Yes

Keywords

A1. High resolution electron microscopy (HRTEM)
A1. Interface structure
A1. Misfit dislocation source
A1. Partial dislocation
A1. Ruddleson-Popper planar defects
B1. Perovskites

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

More information

10.1016/S0022-0248(01)01734-1

Cite this

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abstract = "We have investigated by high-resolution transmission electron microscopy SrTiO3/SrRuO3bilayer films epitaxially grown on LaAlO3substrate. At the SrRuO3/LaAlO3interface we frequently observe dissociated superdislocations in connection with Ruddlesden-Popper-type planar defects. These superdislocations can contribute to misfit relaxation equivalent to a perfect misfit dislocation with Burgers vector a〈110〉. The formation and the geometry of this defect arrangement is discussed in detail. The Sr-rich Ruddlesden-Popper-defect can be introduced by composition fluctuations during film deposition. It can be concluded that it can act as a source for the generation of misfit dislocations.",

keywords = "A1. High resolution electron microscopy (HRTEM), A1. Interface structure, A1. Misfit dislocation source, A1. Partial dislocation, A1. Ruddleson-Popper planar defects, B1. Perovskites",

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T1 - A new mechanism for misfit dislocation generation: Superdislocations associated with Ruddlesden-Popper planar defects

AU - Wu, J. S.

AU - Jia, C. L.

AU - Urban, K.

AU - Hao, Jianhua

AU - Xi, X. X.

PY - 2002/1/1

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N2 - We have investigated by high-resolution transmission electron microscopy SrTiO3/SrRuO3bilayer films epitaxially grown on LaAlO3substrate. At the SrRuO3/LaAlO3interface we frequently observe dissociated superdislocations in connection with Ruddlesden-Popper-type planar defects. These superdislocations can contribute to misfit relaxation equivalent to a perfect misfit dislocation with Burgers vector a〈110〉. The formation and the geometry of this defect arrangement is discussed in detail. The Sr-rich Ruddlesden-Popper-defect can be introduced by composition fluctuations during film deposition. It can be concluded that it can act as a source for the generation of misfit dislocations.

AB - We have investigated by high-resolution transmission electron microscopy SrTiO3/SrRuO3bilayer films epitaxially grown on LaAlO3substrate. At the SrRuO3/LaAlO3interface we frequently observe dissociated superdislocations in connection with Ruddlesden-Popper-type planar defects. These superdislocations can contribute to misfit relaxation equivalent to a perfect misfit dislocation with Burgers vector a〈110〉. The formation and the geometry of this defect arrangement is discussed in detail. The Sr-rich Ruddlesden-Popper-defect can be introduced by composition fluctuations during film deposition. It can be concluded that it can act as a source for the generation of misfit dislocations.

KW - A1. High resolution electron microscopy (HRTEM)

KW - A1. Interface structure

KW - A1. Misfit dislocation source

KW - A1. Partial dislocation

KW - A1. Ruddleson-Popper planar defects

KW - B1. Perovskites

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DO - 10.1016/S0022-0248(01)01734-1

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EP - 609

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

IS - 2-3

ER -

A new mechanism for misfit dislocation generation: Superdislocations associated with Ruddlesden-Popper planar defects

Abstract

Keywords

ASJC Scopus subject areas

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