Patent ID: 6261387
Filing Date: 2001-07-17
Classification: H01F

Abstract:
A permanent rare-earth magnet having a composition expressed as [(Ce.sub.x La.sub.1-x).sub.y R.sub.1-y ].sub.z (F.sub.1-v B.sub.v).sub.1-z,wherein R is one or more rare-earth elements selected from the group consisting of Y, Pr, Nd, Sm, Er, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;wherein F is Fe or Fe and up to 20 atomic percent Co by substitution; andwherein subscripts denote the relative elemental atomic composition with0.9<x.ltoreq.1.0,0.2.ltoreq.y.ltoreq.0.8,0.04.ltoreq.z.ltoreq.0.16, and0.01 <v <0.30said magnet having an intrinsic coercivity of above 4 kOe.