Magnetic properties and magnetocaloric effect in amorphous Co35Er65 ribbon

• Published in: Journal of magnetism and magnetic materials 2014-11, Vol.369, p.92-95
• Main Authors: Boutahar, A., Lassri, H., Zehani, K., Bessais, L., Hlil, E.K.
• Format: Article
• Language: English
• Subjects: Amorphous Co35Er65 ribbon; Arrott plot; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Low temperature; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); Magnetic properties and materials; Magnetic transition; Magnetically ordered materials: other intrinsic properties; Magnetocaloric effect; Magnetocaloric effect, magnetic cooling; Physics
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2014.06.003

Amorphous Co35Er65 ribbon was synthesized using melt spinning technique. Their magnetic properties and magnetocaloric effect (MCE) have been studied by the magnetization and isothermal magnetization of different temperature measurements. It is found that the sample obeys to the first-order magnetic transition (FOMT) from ferromagnetic (FM) to paramagnetic (PM) state at the Curie temperatures TC=10K. Using the thermodynamic Maxwell׳s relation, magnetic entropy change (−ΔSM) is estimated and discussed in terms of MCE. The ribbon presents a large magnetocaloric effect at low temperature reaching 5.97J/Kkg under magnetic field of 0–5T. •Magnetic properties and magnetocaloric effect of the amorphous Co35Er65 ribbon are reported.•Analysis of the magnetic ordering transition using the Landau theory and Arrott׳s plots reveals occurrence of a FOMT in the amorphous Co35Er65 ribbon.•The value of (−ΔSmax) reaches a maximum value of 5.97J/kgK at 5T field.