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The electrical resistivity of large single crystals of 99.9999+% gallium has been found to exhibit anomalous behavior near 1.7^∘{}K. The temperature at which the anomaly occurs decreases extremely rapidly with increasing magnetic field. Measurements were made with currents as small as 0.005 A, using a potentiometric system with 10^-15-V sensitivity.
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Newbower et al. (1967) studied this question.
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