Magnetic memory including a recording device and medium that can

Details Magnetic memory including a recording device and medium that can Magnetic memory including a recording device and medium that can

1986-12-15

1988-05-03

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Core

360119, G11B 5147

Patent

active

047424133

ABSTRACT:
A magnetic memory comprising a thin-film magnetic head as well as a recording medium which is provided with a storage layer that can be magnetized perpendicularly (vertically). The magnetic head comprises two magnet legs having a magnetic layer each, the magnetic poles of which are arranged in tandem, forming a gap therebetween. With this magnetic head, a write and read function with high efficiency is obtained. It is provided for this purpose that at least one magnetic layer of the trailing magnet leg differs at least in its end region with respect to its magnetic behavior (magnetic resistance; saturation magnetization) from the at least one magnetic layer of the leading magnet leg at least in its end region, and that the coercivity of the material of the storage layer of the recording medium is chosen sufficiently high, so that overwriting of the storage layer of the recording medium by the trailing magnet leg is, at least largely, eliminated.

REFERENCES:
patent: 3639699 (1972-02-01), Tiemann
IEEE Trans. Magn., vol. Mag 16 (Jan. 80), pp. 71-76.
IEEE Trans. Magn., vol. Mag 19 (Sep. 1983), pp. 1611-1613, 1617-1619.
IEEE Trans. Magn., vol. Mag 20 (Sep. 1984), pp. 657-662, 675-680.
Feinwerktechnik und Messtechnik (Mar. 1980), pp. 53-59.
Siemens Zeitschrift (1978), 434-437.

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