| 摘要 |
PURPOSE:To obtain an excellent electromagnetic conversion characteristic over a wide frequency range by providing a 1st magnetic layer formed by dispersing ferromagnetic alloy powder in a binder on a nonmagnetic base and further, providing the 2nd magnetic layer consisting of a thin magnetic film contg. specific iron nitride thereon. CONSTITUTION:The 1st magnetic layer formed by dispersing the ferromagnetic alloy powder into the binder is provided on the nonmagnetic base and the 2nd magnetic layer consisting of the thin magnetic film contg. the iron nitride expressed by FexN (x is 2-8) is further provided thereon. The compsn. of the ferromagnetic alloy powder to be used for the 1st magnetic layer is pure iron and alloy such as Fe, Fe-Ni, Fe-Ni-Co and FexN (x: 2-8) and further, a slight amt. of nonmagnetic or nonmetallic elements such as B, C and N may be incorporated therein in order to improve the characteristics. The magnetic recording medium of the double layer type which has the excellent output in the wide frequency range from a low to high range and has the excellent corrosion resistance is thereby obtd.
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