Keywords

antiphase ordering, lithium aluminate, surface phases

Abstract

Antiphase domains are seen in single crystal gamma lithium aluminate (gamma-LiAlO2) with 16.7 nm periodicity in the <110> direction. Alternate domains have a (1/2) [001] shift. Beta phase lithium aluminate (beta-LiAlO2) is seen to form on the surface of the as-received wafers with an epitaxial strain limited relationship with the bulk gamma phase. The orthorhombic beta phase aligns with the a and b axes (0.528 and 0.630 nm) matching with the tetragonal gamma phase's a and c axes (0.5168 and 0.6268 nm). The gamma and beta phases are seen to have different etch rates. The beta phase converts back to the gamma phase above 450°C.

Original Publication Citation

Vanfleet, R. R., J. A. Simmons, D. W. Hill, M. M. C. Chou, and B. H. Chai."Antiphase ordering and surface phases in lithium aluminate." Journal of Applied Physics 14 (28).

Document Type

Peer-Reviewed Article

Publication Date

2008-11-12

Permanent URL

http://hdl.lib.byu.edu/1877/1248

Publisher

AIP

Language

English

College

Physical and Mathematical Sciences

Department

Physics and Astronomy

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