Abstract
Thin layer particulate recording media with a nonmagnetic under layer have been developed with double coating techniques, and their high performance have been confirmed. Such media produce a higher output than single and thick layer media because they have a smooth surface resulting from the under layer smoothness and less demagnetization resulting from the thinness of the magnetic layer. The application of Ba-ferrite particles to thin layer media, in addition to metal particles, has clarified the differences between the characteristics of the two media. The output of thin layer metal media has been improved by up to +9dB compared with the value for reference metal media. Thin layer Ba-ferrite media showed lower noise.
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