Electromagnetic transducers

Details Electromagnetic transducers Electromagnetic transducers

1974-11-05

1976-03-30

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

338 32R, 360122, 360123, 360125, G11B 530, G11B 516, G11B 522

Patent

active

039478890

ABSTRACT:
An electromagnetic transducer based on the magnetoresistive effect is made of a stack of members each of which comprises a magnetoresistive layer enclosed, with interposition of non-magnetic insulating layer, between two thicker high permeability layers, so that these layers are in leakage field magnetostatic coupling. The members are stacked with interposition of non-magnetic layers such that they are in relative edge effect magnetostatic coupling relation. Each magnetoresistive layer has its easy magnetization axis 45.degree. to the direction of passage of an electrical current therethrough and said axes are 90.degree. to each other in any two of the consecutive members of the stack.

REFERENCES:
patent: 3493694 (1970-02-01), Hunt
patent: 3731007 (1973-05-01), Masuda et al.
patent: 3840898 (1974-10-01), Bajorek et al.
patent: 3860965 (1975-01-01), Voegeli
patent: 3881190 (1975-04-01), Brock et al.

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