On the mechanism of intersublattice exchange in intermetallic compounds of rare-earth metals and iron

Shifts of hyperfine fields are measured by the method of spin echo on the nuclei of gadolinium and yttrium in quasi-binary and ternary Laves phases containing impurity atoms of terbium and samarium. The analysis of the results obtained suggests the presence of negative 5d polarization in the neighborhood of gadolinium atoms. A new mechanism of intersublattice exchange, which is a version of hybrid exchange, is proposed.