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Magnetoresistive Magnetic Head

IP.com Disclosure Number: IPCOM000083489D
Original Publication Date: 1975-Jun-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Smith, SH: AUTHOR

Abstract

A magnetoresistive magnetic head used for reading recorded information is combined with a thin-film inductive type head, which is best adapted for recording information, to give an optimum read/write film-constructed head.

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Magnetoresistive Magnetic Head

A magnetoresistive magnetic head used for reading recorded information is combined with a thin-film inductive type head, which is best adapted for recording information, to give an optimum read/write film-constructed head.

A magnetoresistive M/R element changes its resistance as a function of the magnetic field encountered. When a magnetoresistive element is placed adjacent magnetically recorded information, a voltage change dependent upon the information can be obtained through conductors attached to the element.

The operation of the magnetoresistive element is enhanced by providing a yoke formed of magnetic material P1 and P2, such as permalloy. The yoke provides a read/write gap R/W for sensing the magnetically recorded information, a superior wear surface and, if an additional side gap is provided, superior magnetic field-concentration characteristics.

The same head may be used for recording magnetic information by providing an additional conductive loop within the yoke. Current through the loop provides a magnetic field at the R/W gap usable for recording.

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