RELAXATION AND SPIN CORRELATIONS IN SN-119-DOPED A-FE90SC10

Combined Sn-119 and Fe-57 Mossbauer measurements have been made on a S n-doped sample of a-Fe-Sc both around T-sg (117+/-2 K) to examine the onset of order, and at 12 K to investigate spin correlations. The diff erent time scales probed by the Sn and Fe Mossbauer transitions allow us to confirm that cluster relaxation effects do not contribute to the ordering at T-sg, while the large transferred hyperfine field (B-hf) at the Sn sites, in an alloy known to exhibit isotropic spin freezing, is inconsistent with the simple view of the transferred field arising as a vector sum over the nearest-neighbor moments.