Crystallization kinetics and magnetization behavior of RE^sub 3.5^Fe^sub 66.5^Co^sub 10^B^sub 20^ (RE = Pr, Nd) nanocomposite ribbons

• Published in: Rare metals 2014-12, Vol.33 (6), p.681
• Main Authors: Wu, Qiong, Zhang, Peng-yue, Pan, Min-xiang, Li, Dong-yun, Ge, Hong-liang
• Format: Article
• Language: English
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-013-0136-8

The influence of hard magnetic phase on the crystallization kinetics and magnetization behavior in nanocomposite RE^sub 3.5^Fe^sub 66.5^Co^sub 10^B^sub 20^ (RE = Pr, Nd) ribbons prepared by melt-spinning was studied. Differential scanning calorimeter (DSC) measurement of the as-cast melt-spun amorphous ribbons during the crystallization process shows that precipitation energy of Pr^sub 2^Fe^sub 14^B phase is higher than that for Nd^sub 2^Fe^sub 14^B phase, confirmed by X-ray diffraction (XRD) patterns. It can be explained by the different radii of Pr and Nd atoms. Scanning electron microscopy (SEM) images indicate that the average grain size in Pr^sub 3.5^Fe^sub 66.5^Co^sub 10^B^sub 20^ ribbon is smaller than that in Nd^sub 3.5^Fe^sub 66.5^Co^sub 10^B^sub 20^, resulting in an enhancement of exchange coupling between hard and soft phases. It is responsible for the better hard magnetic properties in Pr^sub 3.5^Fe^sub 66.5^Co^sub 10^B^sub 20^. In addition, the process of magnetization reversal of nanocomposite RE^sub 3.5^Fe^sub 66.5^Co^sub 10^B^sub 20^ (RE = Pr, Nd) ribbons was discussed in detail by the recoil loops.[PUBLICATION ABSTRACT]