The properties of GaAs diffused with iron

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Abstract
Iron has been diffused into GaAs from the vapour phase. Use has been made of radiotracer techniques, electrical measurements and electron paramagnetic resonance to investigate the properties of the material after diffusion. The iron is found to behave as a net acceptor in material that was originally n-type but its electrical activity is only about 0.5. It is concluded that the diffusion mechanism is primarily interstitial but that most of the iron in the bulk of a specimen is substitutional. Close to the surface of a diffused slice the situation is less clear and it seems likely that the iron is incorporated in the form of some complex.

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