Magnetoresistant transducer for reading very high-density data

Details Magnetoresistant transducer for reading very high-density data Magnetoresistant transducer for reading very high-density data

1982-02-23

1984-12-11

Konick, Bernard

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 512, G11B 530

Patent

active

044881940

ABSTRACT:
A magnetoresistant transducer is described for reading very high-density a. The magnetoresistant transducer (TMRI) includes at least one magnetoresistor (MRI) of an anisotropic magnetic material placed perpendicular to the direction in which the data of a medium (SM) pass. The axis (AFAI) of easy magnetization of the magnetoresistor is normal to the medium and includes a thin, mono-range or single domain magnetic anisotropic layer (CI) normal to the medium and to the direction in which the data pass. The mono-range or single domain layer is strongly coupled magnetically with the magnetoresistor, and its axis of easy magnetization (AFACI) is normal to the medium and opposite in direction to the axis of easy magnetization of the magnetoresistor. The invention is particularly applicable to the reading of magnetic tapes and disks containing high density data.

REFERENCES:
patent: 3626396 (1971-12-01), Eastman
patent: 3731007 (1973-05-01), Masuda et al.
patent: 4179719 (1979-12-01), Imamura et al.
patent: 4321640 (1982-03-01), Van Gestel
IBM Tech. Disclosure, p. 124, vol. 9 #2, Jul. 1966.
IBM Tech. Disclosure, p. 3278, vol. 16 #10, Mar. 1974.
IBM Tech. Disclosure, p. 3123, vol. 15 #10, Mar. 1973.

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