PURPOSE: To permit an excellent vertical magnetization of a magnetic layer and improve recording characteristics of a magnetic recording medium in a high-density range, by a method wherein triaxially anisotropic granular magnetic powder having a particle diameter not larger than 0.1μ is contained in the iron oxide magnetic layer and orientated so that the vertical residual magnetic flux density is not smaller than 1,000 gauss.
CONSTITUTION: Iron oxide magnetic powder containing cobalt in a solid solution state which is triaxially anisotropic granular powder having a particle diameter of 0.04μ, a cobalt content of 5.0wt%, a coercive force of 950 oersted, a saturated magnetization amount of 71emu/g and an angular type of 0.76 is employed to prepare a magnetic paint. The magnetic paint is applied onto a polyester base film, dried, surface-treated and then cut to obtain a magnetic tape.
| JPS5919233 | MAGNETIC RECORDING BODY |
| JPH11293176 | PRODUCTION OF MAGNETIC COATING MATERIAL |
| JPS62298002 | MAGNETIC RECORDING AND REPRODUCING METHOD |
KARASHIMA KAZUTO
ZAITSU HIROSHI
