Effect of Zr on the crystallographic texture of precipitation-hardened Sm(Co,Fe,Cu,Zr)7 ribbons

Rong, Chuan-bing; Zhang, Hong-wei; He, Shu-li; Chen, Ren-jie; Shen, Bao-gen
March 2005
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p122506
Academic Journal
Sm(CobalFe0.1Cu0.1Zrw)7 (w=0.01-0.09) ribbons have been prepared by conventional melt spinning followed by precipitation hardening. The Zr addition can suppress the nucleation of solidification and increase the velocity of grain growth. This leads to the increase of texture degree of the ribbons with increasing Zr content. The crystallographic texture is still preserved in ribbons after the precipitation hardening. The remanence ratio of the heat-treated ribbons increases from 0.7 for w=0.01 to 0.9 for w=0.08. An energy product of about 10 MGOe has been obtained in the ribbon with w=0.03. The angular dependence of coercivity suggests that the magnetization reversal of the precipitation-hardened ribbons is controlled by both domain-wall pinning and nucleation mechanism.


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