Abstract
The longitudinal and transverse magnetostriction of polycrystalline Pd, Pd99Rh1, Pd97Rh3 and Pd95Rh5 is measured at 4.2K before and after charging with about 1 at.% H. The alloys are believed to be in the alpha phase and the systematic decrease in the volume magnetostriction is explained in a semi-rigid band model as being due to filling the 4d band at a rate of 0.3+or-0.2 states per H atom. The shape magnetostriction is unchanged by hydrogenation.
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