Abstract
Measurements have been made on the residual electrical resistivity in single crystals of high-purity aluminum ( R R R ≃ 50000) at 4.2 K. The samples were cut from single-crystal plates with {110} surfaces. The axes of the samples were oriented parallel with the principal axes <100>, <111> and <110>. The results show strong anisotropy, previously not predicted for a normal metal with cubic symmetry. The resistivity increases in the order of the <110>, <111> and <100> directions; the value along <100> is significantly larger than those of the other two directions.
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