Patent ID: 7285338
Filing Date: 2007-10-23
Classification: B82Y,C23C,H01F,Y10T

Abstract:
1. An anisotropic thin-film rare-earth permanent magnet, comprising at least one atomic layered unit that includes: a plurality of monoatomic layers of a transition metal element directly disposed on each other and directly layered on a monoatomic layer of a rare-earth element which is directly layered on a substrate comprising a nonmagnetic material with a surface roughness of 1.0 μm or less; and one or more monoatomic layers of the rare-earth element directly layered on an uppermost monoatomic layer of the plurality of monoatomic layers of the transition metal element, wherein the at least one atomic layered unit has an axis of easy magnetization in the layering direction, and the anisotropic thin-film rare-earth permanent magnet has a coercive force of 0.55 MA/m or higher and a residual magnetic flux density of 1.02 T or higher.