Atomic structure of Σ = 5 (130) symmetrical tilt boundary in strontium titanate

V. Ravikumar*, Vinayak P Dravid

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

The atomic structure of a pristine (undoped) boundary in strontium titanate has been investigated using transmission electron microscopy techniques. Results of electron diffraction studies indicate a pure tilt boundary with a common [001] tilt axis, and a tilt angle of 36.8°, which corresponds to a Σ = 5 grain boundary in the Coincidence Site Lattice (CSL) notation. High Resolution Transmission Electron Microscopy (HRTEM) indicates a symmetric tilt grain boundary with a (130) type grain boundary plane. No cation non-stoichiometry or impurity segregants could be detected at the interface, within the limits of the Energy Dispersive X-ray microanalysis technique used. The gain boundary has a compact core, with negligible plane-normal rigid body translation (RBT). An in-plane RBT of ( 1/2 )d130 (≈ 0.62 A°) was identified from the high resolution electron micrographs. An empirical model of the relaxed atomic structure of the gain boundary is proposed.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Pages115-120
Number of pages6
Volume295
ISBN (Print)1558991905
StatePublished - Jan 1 1993
EventSymposium on Atomic-scale Imaging of Surfaces and Interfaces -
Duration: Nov 30 1992Dec 2 1992

Other

OtherSymposium on Atomic-scale Imaging of Surfaces and Interfaces
Period11/30/9212/2/92

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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