Method of producing a permanent magnet having high and low coercivity regions.

摘要

In accordance with a preferred embodiment of the invention, an arcuate magnet (36) is formed by selectively hot-working a composition including iron,neodymium and or praseodymium, and boron so that an edge (40) of the arcuate magnet has greater apparent coercivity than a central region (38) and the central region (38) has a higher remanence than the edge (40).