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The magnetic field distribution of the perpendicular recording head has been investigate using a large scale model. This paper discusses the field distribution of the actual head from the measured results in the model head. It is shown that the strength of head field increases and the field distribution becomes very sharp because of the interaction between the head and the medium. The perpendicular recording which consists of the head having the sharp field distribution and a perpendicular anisotropy medium results in the demagnetization-free recording in very high densities.
Iwasaki et al. (Fri,) studied this question.