STRUCTURE-PROPERTY RELATIONSHIPS IN STRONTIUM BARIUM NIOBATE .1. NEEDLE-LIKE NANOPOLAR DOMAINS AND THE METASTABLY-LOCKED INCOMMENSURATE STRUCTURE

Authors
VIEHLAND D XU Z HUANG WH
Citation
D. Viehland et al., STRUCTURE-PROPERTY RELATIONSHIPS IN STRONTIUM BARIUM NIOBATE .1. NEEDLE-LIKE NANOPOLAR DOMAINS AND THE METASTABLY-LOCKED INCOMMENSURATE STRUCTURE, Philosophical magazine. A. Physics of condensed matter. Defects and mechanical properties, 71(2), 1995, pp. 205-217
Citations number
22
Categorie Soggetti
Physics, Applied
Journal title
Philosophical magazine. A. Physics of condensed matter. Defects and mechanical properties → ACNP
ISSN journal
01418610
Volume
71
Issue
2
Year of publication
1995
Pages
205 - 217
Database
ISI
SICI code
0141-8610(1995)71:2<205:SRISBN>2.0.ZU;2-I
Abstract
Transmission electron microscopy investigations have been performed on Sr2Ba1-xNb2O6 (SBN (x)(1 - x)). Bright-field imaging of (100)-oriente d SBN 60/40 and 75/25 crystals revealed nanopolar domains with a stron g shape anisotropy. The morphology of the nanopolar domains was needle like. Selected area electron diffraction (SAED) patterns revealed the existence of 1/x[110] incommensurate modulations. Dark-field imaging of the incommensurate reflections found the existence of nanometre-siz ed ferroelastic domains. Diffuse scattering was observed in the SAED p atterns along the (100) direction. This diffuse scattering is believed to arise due to strain gradient interactions between the A-site catio n distribution and the incommensuration.