Abstract
We report the observation of a nonlinear (quadratic) dependence of the Hall voltage ${\mathit{V}}_{\mathit{H}}$ on magnetic field at small fields in the hopping regime. With increasing field the Hall coefficient, ${\mathit{R}}_{\mathit{H}}$=${\mathit{V}}_{\mathit{H}}$/IH, of insulating compensated n-type CdSe increases approximately linearly, then remains roughly constant at a plateau value, and increases again at higher fields. No theory currently exists with which to compare this unanticipated behavior.
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