Magnetostriction of Bismuth and Graphite in Fields up to 40 Tesla

Longitudinal magnetostriction has been measured in bismuth along the binary axis and in graphite along the c -axis in pulsed magnetic fields up to 40 T. The field dependence of the magnetostriction of bismuth is compared with theoretical calculations based on a model proposed by Vecchi et al. for the lowest quantum number Landau levels. A better correspondence with the experimental result is obtained by using a set of parameter values recently given by Hiruma et al. rather than the original Vecchi et al. 's values. For graphite, a large and field-superlinear magnetostriction has been found.