Study of the structure of ferroelectric domain walls in barium titanate ceramics

Conference · Tue Jan 31 23:00:00 EST 1995

OSTI ID:188656

Normand, L; Thorel, A ^[1]; Kilaas, R ^[2]; Montardi, Y ^[3]

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1. Centre des Materiaux, Evry cedex (France)
2. Lawrence Berkeley Lab., CA (United States)
3. Rhone-Poulenc, CRA, Aubervilliers (France)

Structure of 90{degree} ferroelectric domain boundaries in barium titanate ceramics has been studied by means of Transmission Electron Microscopy and High Resolution TEM. Tilts of specific fringes across domain walls are measured on HREM images and Selected Area Diffraction Patterns. They are in a good agreement with the twin model admitted for these domain boundaries. A computerized method has been developed to give access to quantitative information about atomic displacements across these ferroelectric domain walls. The so calculated displacement field is then compared with Landau-Ginzburg based theoretical predictions.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 188656
• Report Number(s): LBL--37985; CONF-9506281--2; ON: DE96004715
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
DOMAIN STRUCTURE
FERROELECTRIC MATERIALS
MICROSTRUCTURE
TITANATES