We studied the effect of the flux ratio and substrate temperature on magnetotransport properties and lattice parameters of grown by molecular-beam epitaxy. For all the substrate temperatures, the conductivities and Curie temperatures of the layers were found to increase as the flux ratio approaches 1. A Curie temperature as high as 95 K was achieved for the samples grown at 240 °C and a ratio of about 1.5. The lattice parameter of increased with decreasing ratio and/or increasing growth temperature. Possible reasons for the effect of the ratio on the magnetotransport properties and lattice parameter of GaMnAs are discussed.
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