| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic metal powder for high power magnetic recording media which is suitable for high density magnetic recording and superior in oxidation resistance. <P>SOLUTION: The magnetic metal powder is composed of Co-containing grains of Fe as a main component for coated magnetic recording media. The product of the BET specific surface area and the true density is 250 m<SP>2</SP>/cc or more, average length of the major axis of the particle is 10 to 200 nm, and the true density is 5.0 g/cc or more. Preferably it contains Al and R, its saturated magnetization and true density product of 450 kAm<SP>2</SP>/cc or more, and it contains Co, Al and R wherein Co/Fe = 10-50% Al/(Fe + Co) = 1-50% and R/(Fe + Co) = 1-30% in atm.%. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
