HYPERFINE FIELD AND INDUCED MOMENT OF TA-181 IN THE RARE EARTH-IRON L-LAVES COMPOUNDS

The hyperfine magnetic fields and their temperature dependence for Ta- 181 in ErFe2 and TmFe2 have been measured by the TDPAC method. Respect ively, the following values were obtained at T approximate to 80 K: 16 .3(2)T and 17.6(2) T. These data complete those for other RFe2 Laves p hases (except CeFe2) obtained earlier and are discussed in common in t he framework of the model predicting the induction of the localised 5d moment at Ta ions due to 5d-3d band hybridisation enhanced by the 4f- 5d interaction.