Correlated hyperfine interactions in amorphous Cr_72-xFe_xC₁₇Si₈Al₃alloys

Mössbauer effect studies of sputter-deposited tin–cobalt and tin–cobalt–carbon alloys

“…possibility of a quadrupole splitting. The amorphous phase was fit to a Voigt-based function [22]. Here a single Gaussian distribution of quadrupole splittings was used with a linear correlation between the center shift, δ, and the quadrupole splitting, Δ, of the form…”

Mössbauer study of a magnetic ordering in the FeNiCrMoSiB metallic glass

“…1) and a consequent rapid decrease of (H) (open dots in Fig. 2) indicate changes in a chemical SRO [7,15]. They may be caused by a clustering of non-magnetic Cr atoms in the iron sites.…”

“…This behaviour can also be observed on the shapes of corresponding hyperfine distributions. It should be noted here, that the hyperfine distributions for x = 10 and 12 are in fact P(QS) distributions [7]. They are, however, recalculated and redrawn in the same H-scale as the other P(/-/) ones for the purpose of a mutual qualitative comparison.…”

“…This indicates changes in a magnetic ordering due to concentration induced rearrangements of the atoms in the nearest neighbourhoods of iron. Consequently, a chemical SRO is affected [7,15] causing the ferromagnetic exchange interactions to weaken. In addition, decrease of an inplane anisotropy while the Cr content increases may be expected [8].…”

“…Particularly, hyperfine field distribution (HFD), known as a P(H) distribution, and quadrupole splitting distribution, P(QS), are of special interest. The former because of its unusual bimodal character which is a point of controversy in the literature [2, 6-] while the latter appears frequently (with respect to an amount of Cr) in room temperature studies [7,9].…”