Formability and magnetic properties of Dy-Co binary amorphous alloys

L Y Ma,B Z Tang,K C Chan,L Xia,M B Tang,L Zhao,D Ding

doi:10.1063/1.5037357

L Y Ma, B Z Tang + Show 5 more

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https://doi.org/10.1063/1.5037357

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Abstract

In this study, binary Dy-Co ribbons were synthesized by a conventional melt-spinning approach and glassy ribbons were successfully obtained within the compositional range Dy50Co50 to Dy68Co32. The glass formability and magnetic properties of these amorphous alloys were examined. The compositional dependence of glass formability, Curie temperature and magneto-caloric response of the DyxCo100-x (x=50, 55, 60, 65 and 68) amorphous alloys, as well as the mechanism involved, were determined.

Highlights

Amorphous alloys have huge scientific and industrial significance because of their superior properties resulting from their unique structure induced by fabrication conditions far from the equilibrium state.[1,2,3,4] Among these alloys, transition metal (TM) and rare earth (RE) based amorphous alloys have shown application potential because they exhibit pre-eminent magnetic properties
We found a linear relationship between the Gd content and T c in Gd-Co binary amorphous alloys
The glass formability and magnetic properties of the binary Dy-Co amorphous alloys were investigated in this work

Summary

INTRODUCTION

Amorphous alloys have huge scientific and industrial significance because of their superior properties resulting from their unique structure induced by fabrication conditions far from the equilibrium state.[1,2,3,4] Among these alloys, transition metal (TM) and rare earth (RE) based amorphous alloys have shown application potential because they exhibit pre-eminent magnetic properties. One of the valid methods to improve the MCE and formability of Gd-TM-based amorphous alloys is to replace the Gd elements by other RE metals, such as Tb, Dy, Ho, Er, Y and so on.[16,17,18] the addition of Tb and Dy may induce spin-glass-like behavior and make the magnetic entropy change of the amorphous alloys irreversible.[18,19] systematic investigation of the formability and magnetic properties of Tb/Dy-TM binary amorphous alloys can be a simple but valid way to understand the influence of the addition of Tb or Dy on the formability and MCE of amorphous alloys in more detail. The findings are helpful for understanding the formability, T c and magnetocaloric responses of Tb/Dy-TM-based amorphous alloys

EXPERIMENTAL PROCEDURES

RESULTS AND DISCUSSION

Glass forming ability of the Dy-Co binary alloys

Magnetic properties of the amorphous alloys

Magneto-caloric response of the amorphous alloys

CONCLUSIONS