Formation of Ferroelectric BaMgF4 Films on GaAs Substrates

Abstract
Optimum conditions to form ferroelectric BaMgF4 films on GaAs substrates are investigated. It has been found in vacuum evaporation of BaMgF4 sources that combination of low-temperature deposition and subsequent high-temperature annealing is effective for forming BaMgF4 films that do not contain BaF2 and MgF2 crystallites. The optimum deposition and annealing temperatures obtained thus far are 300°C and 600°C, respectively. Crystallinity and electrical properties of the optimum films are characterized.

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