Patent ID: 6312494
Filing Date: 2001-11-06
Classification: H01F

Abstract:
A thin arc segment magnet having a thickness of 1-4 mm and made of a rare earth sintered magnet having a main component composition comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe, wherein R is at least one rare earth element including Y, and T is Fe or Fe and Co, said arc segment magnet having an oxygen content of 0.3 weight % or less based on the total weight of the magnet, a density of 7.56 g/cm.sup.3 or more, a coercivity iHc of 1.1 MA/m (14 kOe) or more at room temperature, and an orientation Br/4.pi.I.sub.max of 96% or more in an anisotropy-providing direction at room temperature.