MAGNETIC POWDER FOR MAGNETIC RECORDING AND MAGNETIC RECORDING MEDIUM MADE THEREOF.

摘要

A magnetic powder for magnetic recording, whose coercive force is improved in stability, and a magnetic recording medium made thereof. The magnetic powder is mainly of a ferrite which is plate-shaped, has a crystal anisotropy, and contains elements for decreasing the temperature coefficient of the coercive force. The difference between the coercive force (Hc) of the magnetic powder at normal temperature and the coercive force (Hc(s)) in the state that the magnetic powder is made to adhere dispersingly to the surfaces of the particles of silica (SiO2) is 100 (Oe) or less.