Magnetic properties and phase evolution of direct-quenched (Co40Fe22Nb6Zr2B30)98M2 (M=Cr, Cu, Sn, Dy, Pr, and Ta) ribbons with crystallization treatments

Abstract The effects of element addition in melt spun (Co 40 Fe 22 Nb 6 Zr 2 B 30 ) 98 M 2 ribbons on magnetic properties have been investigated. In general, high crystallization degree of element additions results in high-saturated magnetization ( M s ). In this study, the additions of Cr and Cu increase their crystallization temperatures and cause high M s 's, while the additions of Sn, Dy, Pr, and Ta reduce their M s 's. The structure evolution from element additions demonstrates that the crystallization degree and the existence of extra Fe-based phase are strongly related to the final magnetic properties.