Chemical Reactions at the in vacuo Au/InP Interface.
Technical rept. no. 5, Oct 86-Aug 87,
CALIFORNIA UNIV LOS ANGELES
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The reaction between a gold film and an indium phosphide substrate occurs much more readily in vacuo than under an atmosphere pressure of an inert gas. At high pressures, the compounds Au2P3 and the Y intermetallic compound at times designated Au7In3, Au9In4, or Au2In are formed at 450 C and remain fairly stable even when annealed at 500 C for hours. Under ultra-high vacuum conditions, phosphorus readily escapes from the film when a sample is annealed at 300 C for 15 minutes, and the major reaction products are the psi phase Au3In2 and an unidentified Au-InP behaves more like a closed thermodynamic system under pressure than in a vacuum. Keywords Phosphorus escape, Composition shift, Layered islands, Four solid phases, Ternary phase diagram, Intense reflections.
- Physical Chemistry