Recording characteristics and durability of Ba-ferrite-coated magnetic media.
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概要
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Magnetic media having Ba-ferrite coatings of various magnetic properties and particle size was investigated for the purpose of attaining higher recording density and durability. It was found that media having Ba-ferrite coatings with a coercivity Hc of 730 Oe and an average particle diameter of 0.05μm has good short-wavelength response. Using a narrow-gap ring-shaped head, a recording density D50 of 34 KFRPI was obtained, and the other read-write properties-overwrite, resolution and modulation-also showed good response. And through the use of a binder system and dispersion agent suitable for Ba-ferrite particles, the magnetic media maintains a durability of more than 8 million passes.
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