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The thermoelectric power S(T) of MnAs 1-x P x compounds has been measured in the temperature range from 5K to 350K and for compositions between x=0 and x=0.1. In addition to diffusion thermopower several anomalies are observed. Phonon drag effects may be responsible for a maximum below 30K while other anomalies are related to magnetic phase transitions or to particular scattering mechanisms which have been inferred from resistivity measurements.
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Neitzel et al. (1978) studied this question.
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