Linear Magnetoresistance Caused by Sample Thickness Variations

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Abstract
Experiments are presented which show that surface imperfections can give rise to a larger linear magnetoresistance than previously supposed; in fact, large enough to explain many hitherto-unexplained published results. A theoretical model, which takes into account both the finite width of the sample and the Hall fields within it, is shown to describe the experimental results quantitatively, without the use of adjustable parameters.