Super conducting thin-film magnetic head including a magnetoresistive element
AssigneeU.S. Philips Corporation
InventorsJacobus J. M. Ruigrok, Victor Zieren
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Abstract
Thin-film magnetic head including a magnetoresistive element (1) and a face (9) for magnetically coupling the element with a magnetic recording medium. A magnetic yoke constituted by three layers (3, 5, 7) of a magnetically permeable material has a gap (13) which is bridged by the magnetoresistive element. A layer (15) of a superconducting material for improving the efficiency of the magnetic head is provided between the layers (3) and (5) and the element (1) on the one hand and the layer (7) on the other hand. For protection from external disturbing magnetic fields and reduction of stray flux a layer (43A, 43B, respectively) of a superconducting material is provided on the layers (3) and (5) and under the layer (7).
Claims4
A thin-film magnetic head including a magnetoresistive element and a face for magnetically coupling the magnetoresistive element with a magnetic recording medium, comprising
- a first layer and an aligned second layer, both consisting of a magnetically permeable material, a gap provided which is bridged by the magnetoresistive element, being present between said layers, the first layer having an end remote from the magnetoresistive element and adjoining the said face, and
- a third layer of a magnetically permeable material located on a side of the magnetoresistive element remote from the first and second layers extending from the said face and being magnetically connected to the second layer of a magnetically permeable material,
- characterized in that a layer of a superconducting material is provided between the magnetoresistive element and the third layer of a magnetically permeable material.
Dependencies are inferred from the claim text.