Field-Oriented Magnetoresistive Head
Original Publication Date: 1980-Feb-01
Included in the Prior Art Database: 2005-Feb-13
Conventional magnetoresistive (MR) heads are oriented parallel with the direction of current flow. The sensed current produces a field which is perpendicular to the easy axis and perpendicular with the media field. Shape anisotropy of the element retards switching of the domains to the parallel direction. Shape anisotropy depends upon element shape as well as other things and is therefore affected by element length and throat height after the head is contoured to its final shape. This sensitivity to shape can be avoided through overcoating of the MR element by a high electrically conductive material, as shown in Fig. 1.