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Perpendicular magnetic recording -- Evolution and future

1984; IEEE Magnetics Society; Volume: 20; Issue: 5 Linguagem: Inglês

10.1109/tmag.1984.1063563

1941-0069

S. Iwasaki,

Theoretical and Computational Physics

This paper reviews research results for the head, medium and recording properties of a perpendicular recording system. Superior bit density characteristics obtained so far indicate that perpendicular recording is basically free from demagnetization in the high density region and that it will establish a new field of recording technology in the future. The prediction is explained in the context of complementary profiles of longitudinal and perpendicular recording. At the very beginning of magnetic recording, a perpendicular-type head was considered but abandoned because a suitable medium did not exist. Progress in material science has enabled us to develop a perpendicular recording medium which is very well suited for ultra high density recording. As so often happens, history has repeated itself through another study of perpendicular recording.