Effect of cobalt substitution on structure and magnetic properties of Nd0.4Zr0.6Fe10–xCoxSi2(x = 0–3) alloys and their ribbons

Autor: Gjoka, M., Sarafidis, C., Giannopoulos, G., Niarchos, D., Hadjipanayis, G., Tabares, J.A., Pérez Alcázar, G.A., Zamora, L.E.
Zdroj: Journal of Rare Earths; 20240101, Issue: Preprints
Abstrakt: This study reports the stabilization of the RFe12-type based compounds where part of R and Fe are substituted with Zr and Co and Si, respectively, in order to examine whether these rare-earth-lean materials are suitable for applications as permanent magnets. Structural and magnetic characterization of the family of alloys with the general formula Nd0.4Zr0.6Fe10–xCoxSi2(x = 0–3) and their melt-spun ribbons were carried out using X-ray diffraction and Mössbauer spectroscopy. The ThMn12-type structure is obtained for all samples as the majority phase with a minority α-Fe(CoSi) phase (less than 5 wt%) as it was estimated by XRD for x = 1 and 2. The Curie temperature increases linearly with Co substitution from 561 K for x= 0 to 712 K for x = 3. The saturation magnetization decreases slightly from 130.5 (x = 1) to 129.1 A·m2/kg (x = 3), while the anisotropy field is following the same trend.
Databáze: Supplemental Index
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