Abstract:
Particulate product containing at least 75 weight % iron (total iron content) and at least 25 weight % acicular. alpha. -iron metal, process for making said product and magnetic recording medium having said product incorporated therein, said product having a length less than 1 micron (. mu. ), a length to diameter ratio of at least about 10:1, a coercivity (iH. sub. c), of greater than about 800 oersteds, a saturation magnetization (. sigma. sub. s) of at least 110 electromagnetic units/gram (emu/g), a residual (remanent) magnetization (. sigma. sub. r) of at least 50 emu/g, and a ratio (. sigma. sub. r /. sigma. sub. s) of residual (remanent) magnetization (. sigma. sub. r) to saturation magnetization of at least about 0. 45.