ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Relationship between the changes in compositional short-range order (CSRO) and field-induced anisotropy (Ku) was studied in the amorphous zero-magnetostrictive alloy of composition Co58.3Fe4.7Ni10Si11B16, which has an appropriate Curie temperature (Tc) and high-crystallization temperature. Resistivity measurements after quenching from preannealing temperature (TQ) show that the reversible CSRO can be separated from the nonreversible topological short-range order. Resistivity change (Δρ/ρ) and Ku change (ΔKu) were measured isothermally at 250 °C (〈Tc) and also isochronally in the sample quenched from TQ. It was found that [d/Δρ/ρ)/dt]/[d(ΔKu )/dt] is constant and the higher TQ is, the larger both d(Δρ/ρ)/dt and d(ΔKu )/dt are. The approximate theory of the kinetics of both CSRO and Ku were given and it can explain the observed changes in Δρ/ρ and ΔKu. By assuming that the tail of the distribution of sizes of the interstitial sites in the soft-sphere dense random-packing model can act as a vacancylike defect, the formation mechanism of ΔKu which can explain the observed experimental facts was proposed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.335558
