Recording Characteristics of LIPS Double-Layered Tape Prepared by Over-Coating

• Published in: IEEE translation journal on magnetics in Japan 1993-11, Vol.8 (11), p.730-735
• Main Authors: Satoh, Y., Shikama, S., Soutome, Y., Nakamura, Y.
• Format: Article
• Language: English
• Subjects: Applied sciences; Barium; Coatings; Electronics; Exact sciences and technology; Fabrication; Ferrites; Iron; Lips; Magnetic and optical mass memories; Magnetics Society; Perpendicular magnetic recording; Storage and reproduction of information; Viscosity; Wideband
• ISSN: 0882-4959; 2375-0545
• DOI: 10.1109/TJMJ.1993.4565737

In order to obtain high-density and wide-band recording characteristics, we have tried fabricating double-orientation magnetic tapes, which are longitudinally oriented inside and perpendicularly oriented at the surface (LIPS orientation), using acicular particles in a single coating process, but a LIPS double-orientation structure was not achieved. The purpose of this paper is to describe the recording characteristics of LIPS tapes with an improved double-orientation structure, obtained by coating a longitudinally oriented underlayer with a perpendicularly oriented upper layer. LIPS double-layered tape prepared in this way (with 2.1 μm thick upper layer consisting of metal particles with H c =700 Oe) exhibited a higher output and wider band characteristics than did any of the perpendicular-orientation monolayer tapes and longitudinally oriented double-layer tapes studied, due to its smooth and perpendicularly well-oriented upper layer and the longitudinal orientation in the underlayer.