Abstract
We report room temperature Mössbauer spectra for R2Fe14B compounds with R=Y, Ce, Pr, Nd, Gd, Dy and Ho. The hyperfine fields are obtained for the six inequivalent iron sublattices in the R2Fe14B crystal structure. The internal magnetic fields scale with the Curie temperature, but the spectra are otherwise virtually independent of the rare-earth component. These results indicate that the electronic configurations of the iron atoms are nearly the same for all these compounds, and that the iron 3d shell dominates the conduction electron polarization contribution to the internal fields.
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