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A high-purity GaAs sample with a measured room-temperature mobility of 15 200 cm2/V sec is examined in detail. Resistivity and Hall measurements are in reasonable agreement with a previously developed model which shows that conducting inhomogeneities can result in anomalously high measured mobilities. A sizeable number of precipitates (probably gallium) are observed in the sample.
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Wolfe et al. (1973) studied this question.
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