Thin-film head study for perpendicular recording

Perpendicular magnetic recording is studied now by various laboratories, in order to improve the linear recording density. The purpose of this paper is to present a new type of magnetic head made of thin films adapted to perpendicular recording. A multi-layers recording medium has been suggested to optimize the interaction between the head and the medium. It is shown that a high field gradient is obtained under the main magnetic pole of the head. This reduces the peak-shift for very high recording densities.