Gurevich Magnetomorphic Oscillations in Single Crystals of Aluminum at Helium Temperatures

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Abstract
Oscillations periodic in the magnetic field have been observed in the Hall resistivity of two electropolished single crystals of aluminum for the case of a magnetic field along the [111] direction. Both period and amplitude are dependent upon sample thickness in the field direction. The phenomena are interpreted in terms of Gurevich theory as providing a measure of the radius of Gaussian curvature of the second-zone hole surface in the [111] direction. This radius is about three times the radius of the free-electron sphere and is much larger than the values of that radius inferred by other laboratories from experiments upon polycrystalline samples.