Abstract
This chapter provides a review of the technical developments in recording medium and their manufacturing processes. In the area of conventional recording media, coating type recording media are widely used. To increase the recording density, accicular magnetic metal particles have been used for high performance media. The study described in this chapter is aimed at making a high density recording medium that has high perpendicular magnetic anisotropy, with improved mechanical durability and chemical stability. Two-component, composite magnetic thin films of cobalt and polymer were produced via simultaneous vapor deposition of cobalt and poly (ethylene terephthalate) polymer, and their magnetic properties and microstructures are evaluated. The results show that with low temperature substrates and the use of high angles produce composite thin films having large perpendicular magnetic anisotropies in the direction normal to the film plane. Cobalt-polymer composite thin films can be produced in a conventional high vacuum evaporator by simultaneous deposition using two different sources, one for cobalt and the other for the polymer. To characterize the cobalt-polymer composite films, equipments such as a vibrating sample magnetometer (VSM) and torque magnetometer to measure the magnetic properties, transmission, and an X-rayX-ray microprobe analyzer to measure the cobalt composition was used.
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