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Surface Phase Transformation In Lithium Aluminate

Student Name: Mancuso, Gordon
Advisor Name: Vanfleet, Richard
Approval Date: 8/1/2008
Report Type: Senior Thesis
Title: Surface Phase Transformation In Lithium Aluminate
Abstract: Gamma phase lithium aluminate ( -LiAlO2) has been proposed as a possi- ble substrate for gallium nitride growth. A corrugation or stripe pattern of beta phase LiAlO2 forms on the surface of -LiAlO2 wafers. We attempt to determine the cause of the phase transformation. The beta phase re-forms immediately after removal. This supports the conclusion that the beta phase is more stable at room temperature than the gamma phase, and suggests that the growth of the beta phase is strain limited.
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