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Electromotive force perpendicular to the current flowing in n-type germanium samples is observed. The deviation angle of electric field vector from current vector is a function of current orientation, temperature, and field strength, and in some cases exceeds 20°. This effect can be attributed to the anisotropy in electric conduction due to the ellipsoidal energy surfaces.
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Sasaki et al. (1958) studied this question.
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