1. Antiphase ordering and surface phases in lithium aluminate.
- Author
-
Vanfleet, R. R., Simmons, J. A., Hill, D. W., Chou, M. M. C., and Chai, B. H.
- Subjects
LITHIUM ,ALUMINATES ,CRYSTAL whiskers ,EPITAXY ,SUBSTRATES (Materials science) ,SEMICONDUCTOR wafers - Abstract
Antiphase domains are seen in single crystal gamma lithium aluminate (γ-LiAlO
2 ) with 16.7 nm periodicity in the <110> direction. Alternate domains have a [001] shift. Beta phase lithium aluminate (β-LiAlO1 2 2 ) is seen to form on the surface of the as-received wafers with an epitaxial strain limited relationship with the bulk γ phase. The orthorhombic β phase aligns with the a and b axes (0.528 and 0.630 nm) matching with the tetragonal γ phase’s a and c axes (0.5168 and 0.6268 nm). The γ and β phases are seen to have different etch rates. The β phase converts back to the γ phase above 450 °C. [ABSTRACT FROM AUTHOR]- Published
- 2008
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