Abstract: According to one embodiment, a magnetic memory device includes a conductive layer, a first magnetic layer, a second magnetic layer, and a first nonmagnetic layer. The conductive layer includes first and second regions, and a third region between the first region and the second region. The second magnetic layer is provided between the third region and the first magnetic layer in a first direction crossing a second direction. The second direction is from the first region toward the second region. The first nonmagnetic layer is provided between the first and second magnetic layers. The second region includes first to third conductive portions. A direction from the first conductive portion toward the second conductive portion is aligned with a third direction. The third direction crosses a plane including the first and second directions. The third conductive portion is between the first and second conductive portions in the third direction.

Abstract: A system according to one embodiment includes a write pole having an end region positioned towards an air bearing surface, a first flare point, and a second flare point positioned between the air bearing surface and the first flare point; and a shield positioned above the write pole, wherein a cross sectional area of the write pole at a point between the first and second flare points along a plane passing through the write pole and oriented about parallel to the air bearing surface is greater than a cross sectional area of the end region of the write pole along a plane oriented parallel to the plane passing through the second flare point. Additional systems and methods are also presented.

Abstract: A main magnetic pole of a recording head is formed in an inverted trapezoidal shape by ion milling but, the long milling time poses a problem of variations in the inverted trapezoidal shape and the dimensional variations in track width. In one embodiment of the invention, a recording head is formed by first forming a lower magnetic pole, a gap layer, and conductor coils, forming an upper magnetic yoke over the gap layer at a position recessed from the air bearing surface, and forming an inorganic insulative layer in the recessed portion. A back magnetic pole connected with the upper magnetic yoke is formed on the back of the lower electrode. Successively, the upper surfaces of the inorganic insulative layer and the upper magnetic yoke are planarized, on which an underlayer film such as of Rh is formed. A magnetic layer is formed by stacking a plurality of thin magnetic films by sputtering over the underlayer film from the air bearing surface as far as the position overlapping the upper magnetic yoke.

Abstract: If the length of a track-defining section from an air bearing surface varies due to tolerance during a head manufacturing process, the recording magnetic field changes, which involves the variation of the track width to be recorded on the medium. In accordance with an embodiment of the present invention, the main magnetic pole of a magnetic head includes a track-defining section shaped in trapezoid and a magnetic flux guiding section formed in trapezoid, as viewed from above. The track-defining section is formed such that its width parallel to the air bearing surface (ABS) increases at the rate of 10 to 20% with respect to its height-direction length. The rate of 10 to 20% is a range in which the shape is properly controllable taking into account the variations resulting from the tolerance of the head manufacturing process.