Substitution and liquid quenching effects on magnetic and magnetocaloric properties of (Gd1-xTbx)12Co7

• Published in: Solid state sciences Vol. 52; pp. 92 - 96
• Main Authors: Shishkin, D.A., Baranov, N.V., Volegov, A.S., Gaviko, V.S.
• Format: Journal Article
• Language: English
• Published: Elsevier Masson SAS 01.02.2016
• Subjects: (Gd1-xTbx)12Co7; Alloys; Amorphous alloys; Crystal structure; Liquids; Magnetic fields; Magnetic moments; Magnetic properties; Magnetocaloric effect; Melt spinning; Melts; Quenching; Magnetic moments; Amorphous alloys; (Gd1-xTbx)12Co7; Magnetocaloric effect
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2015.12.012

The influence of rapid quenching from the melt on the magnetic and magnetothermal properties of the (Gd1-xTbx)12Co7 samples has been investigated. The melt-spun (Gd1-xTbx)12Co7 alloys are observed to exhibit a ferromagnetic-like behavior and increased TC values at low Tb concentration in comparison with crystalline counterparts. The amorphization is suggested to result in the appearance of a small magnetic moment on Co atoms in Gd-rich liquid-quenched alloys. In low magnetic fields, the melt-spun (Gd1-xTbx)12Co7 alloys with high Tb concentrations exhibit enhanced values of the isothermal entropy change and refrigerant capacity then the crystalline compounds of the same composition. [Display omitted] •(Gd1-xTbx)12Co7 compounds have been amorphidized by the melt-spinning technique.•Amorphization of Gd-enriched samples increases the Curie temperature.•In Gd-enriched melt-spun alloys, the Co atoms possesses a small magnetic moment.•The Tb for Gd substitution causes the ferrimagnetic to asperomagnetic changes.•Amorphization of Tb-rich compounds substantially improves their MCE properties.