Hyperfine fields of 5sp shell impurities substituting Sb in the Heusler alloys Pd2MnSb and PdMnSb

Measurements of the hyperfine magnetic fields B_hf of Te and I impurities substituting Sb in the Heusler alloys Pd₂MnSb and PdMnSb clearly establish that the curve of B_hf versus impurity atomic number is shifted to the right by about 1 unit of atomic number for PdMnSb relative to Pd₂MnSb. This phenomenon, and the general shape of the curve can be understood in terms of the conduction electron polarization model developed by Blandin and Campbell.