The substitution effect of chromium on the magnetic properties of (Fe1−xCrx)80Si6B14 metallic glasses (0.02≤x≤0.14)

• Published in: Journal of magnetism and magnetic materials 2013-12, Vol.347, p.75-78
• Main Authors: Álvarez-Alonso, Pablo, Santos, J.D., Pérez, María J., Sánchez-Valdes, C.F., Sánchez Llamazares, J.L., Gorria, Pedro
• Format: Article
• Language: English
• Subjects: Amorphous materials; Chromium; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Curie temperature; Domain effects, magnetization curves, and hysteresis; Entropy; Exact sciences and technology; Fe–Cr–Si–B metallic glasses; Magnetic fields; Magnetic properties; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Magneto-caloric effect; Magnetocaloric effect, magnetic cooling; Metallic glasses; Physics; Saturation (magnetic); Saturation magnetization
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2013.07.048

Magnetization studies were carried out to characterize the magnetic properties of the Iron-rich metallic glasses (Fe1−xCrx)80Si6B14 with 0.02≤x≤0.14. The Curie temperature TC diminishes almost linearly with the increase in the Cr-content from 401K (x=0.10) to 291K (x=0.14), while the saturation magnetization MS at T=5K also undergoes a linear reduction from 169Am2kg−1 (x=0.02) to 87Am2kg−1 (x=0.14). These results suggest that the system should become paramagnetic for x≈0.22. The magneto-caloric properties of samples with TC near room temperature, i.e., with x=0.12 and 0.14, were investigated up to a maximum magnetic field change of 8T. Both ribbons are characterized by a very broad temperature dependence of the magnetic entropy change ΔSM(T) and moderate peak values of 2.9Jkg−1K−1 and 2.6Jkg−1K−1, respectively. •We report on the magnetic properties of (Fe1−xCrx)80Si6B14 metallic glasses with 0.02≤x≤0.14.•Curie temperature and saturation magnetization values reduce linearly as the chromium content increases.•The magneto-caloric response up to 8T has been measured for samples with x=0.12 and 0.14.