Ferroelectric Tungsten Bronze Bulk Crystals and Epitaxial Thin Films for Electro-Optic Device Applications
Abstract
SBN:50 and SBN:60 crystals have now been grown with improved optical quality using the Czochralski technique with automatic diameter control. The liquid phase epitaxial (LPE) growth of SBN:50 on SBN substrates has also been successfully demonstrated, with particularly good results for (100) and (110) film orientations. Electro-optic measurements on SBN:60 single crystals have shown a high value for r51 of 80 x 10 to the minus 12th power m/v, nearly a factor a 2 greater than for SBN:75. The tungsten bronze system Pb1-xBaxNb2O6 (PBN) has shown enhanced piezoelectric, dielectric and optical properties near the morphotropic boundary at x = 0.37. Substantial data on the physical properties of PBN single crystals is presented as a function of composition. Work on an appropriate flux system for LPE growth of PBN is in progress, with particular focus on the system Pb2V2O7 - PBN:60. Systematic work on the tungsten bronze system Ba2NaNb5O15 - Sr2NaNb5O15 (BNN-SNN) and Pb2KNb5O15 - Ba2NaNb5O15 (PKN-BNN) has been undertaken, with both systems showing morphotropic boundary conditions with enhanced dielectric properties. Both systems look promising for future electro-optic development.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1984
- Accession Number
- ADA138693
Entities
People
- L. E. Cross
- R. R. Neurgaonkar