Effect of Ion (Ar+) Irradiation on Cluster Magnetism and Magnetic Interactions in Fe67Cr18B15 Amorphous Alloy

• Published in: Physics of the solid state 2019-10, Vol.61 (10), p.1727-1735
• Main Authors: Okunev, V. D., Samoilenko, Z. A., Aleshkevych, P., Szymczak, H., Szewczyk, A., Antoshina, I. A.
• Format: Article
• Language: English
• Subjects: Absorption spectra; Amorphous alloys; Argon ions; Chemical composition; Chromium; Clusters; Inhomogeneous media; Ion irradiation; Iron; Magnetic properties; Magnetic resonance; Magnetism; Metallic glasses; Organic chemistry; Phase separation; Physics; Physics and Astronomy; Resonance absorption; Solid State Physics
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S1063783419100287

The comparison of the resonance magnetic absorption spectra with the data on structure and magnetic properties of Fe 67 Cr 18 B 15 amorphous samples has shown that a randomly inhomogeneous medium of amorphous alloy is multiphase. Two types of samples with the same chemical composition, but with a different clusterized structure, and the use of (Ar + ) ion irradiation in the experiment made it possible to separate four basic phases with different magnetic properties. The basic phase α-(Fe,Cr) contains large clusters of D < 400 Å in size with a tendency to phase separation of iron (α-Fe) and chromium (α-Cr), which under irradiation, enhances the competing FM and AFM magnetic interactions and increases the intensity of the resonance magnetic absorption lines associated with α-Fe and α-Cr. The phase Fe 3 B ( D < 100 Å) is detected by independent line in the resonance absorption spectra only when its groupings are isolated from the α-(Fe,Cr) metal phase clusters. The fourth phase contains precluster groupings and disappears when the sample is irradiated.