| 摘要 |
PROBLEM TO BE SOLVED: To prepare rare earth based magnetic powder with which corrosion resistance and weather resistance can be improved without deteriorating magnetic properties and also a bonded magnet, or the like, can be manufactured easily and efficiently without increasing the thickness of an oxidation-resistant film on the surface of the magnetic powder and further time deteriorations under its actual-use environment can be reduced, to provide its manufacturing method, and a magnet using the same. SOLUTION: The rare earth based magnetic powder is composed of an alloy or an intermetallic compound containing one or more kinds selected among rare-earth elements and one or more transition-metal elements selected from the group consisting of Fe, Co, Ni and Mn, and further, at least >=80% of the surface of the particle of this magnetic powder is coated with an aluminum oxide film. |
