Spacing Losses of Metal in Gap Head

Kawata, Kaoru; Kobayashi, Hiroshi; Suzuki, Shiori; Ozeki, Tatsuo

doi:10.3379/jmsjmag.15.s2_149

Cited by 5 publications

References 2 publications

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Analog recording process of metal in gap head

et al. 1991

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The characteristics of two kinds of MIG(Meta1-In-Gap) heads for analog recording were investigated. One is a S.S.(Single Sided) MIG head, which has a high BS metal film only at the trailing edge. The other is a D.S.(Double Sided) MIG head, which has high Bs films at the both gap edges. The reproduced voltages of the both MIG heads and ferrite heads were measured using three kinds of particulate tapes and one kind of evaporated tape.It was found that the S.S. MIG head operates as a variable gap length head. In reproducing process, the S.S. MIG head has a narrow gap and excellent characteristics in a high frequency. In recording process, the S.S. MIG head works as a wide effective gap and has a sharp magnetic field at the trailing edge. Results were confirmed by numerical analyses and experiments.

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Analog recording process of metal in gap head

et al. 1991

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The gap recession reduced MIG head

et al. 1993

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Abstruct--In order to reduce the decrease of head output level during running, the wear recession formed on a composite material and MIG heads with various ferrite crystallographic orientations was investigated. It was found that wear recess depends mainly on the wear rate iatio Gf materhls, and that the decrease in output level was in proportion to the spacing loss due to the formation of a level difference at the interface between the metal and the ferritr core. However the decrease measured using different kind talle from the running tape was also effected by the'unfltness between head and tape. We also found that the damage caused to ME tape depends on the ferrite orientation of the head. ferrite amorphous metal

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