摘要:
A magnetoresistive sensor having two free layers with shape anisotropy induced magnetic alignment is disclosed. The magnetoresistive sensor includes a first ferromagnetic free layer having a first quiescent state magnetization direction. The magnetoresistive sensor also includes a second elongated free layer having a second quiescent state magnetization direction and positioned such that the first quiescent state magnetization direction is generally orthogonal to the second quiescent state magnetization direction. Further, a portion of the second ferromagnetic free layer overlaps a portion of the first ferromagnetic free layer proximal to an air bearing surface to form a v-shape. A nonmagnetic spacer layer is also positioned between the first ferromagnetic free layer and the second ferromagnetic free layer.
摘要:
A differential read head comprises one tri-layer reader or a plurality of tri-layer readers operating in a current perpendicular to plane (CPP) mode. The tri-layer readers each comprise a first free layer, a second free layer, and a nonmagnetic layer positioned therebetween. A nonmagnetic spacer is positioned between the plurality of tri-layer readers for electrically connecting the plurality of tri-layer readers in series such that a single CPP sense current representing a differential signal flows serially through the read head. With a single tri-layer reader, the free layers are spaced by a width substantially similar to the transition width of the magnetic medium.
摘要:
Recording media comprises multiple first and second patterned media islands sequentially placed at different first and second radii along a length of a recording track. A recording head sequentially accesses the first and second islands as the head moves along a length of the recording track. Circumferential spacings between sequential first and second islands along the length of the track vary as a skew function of a track radius.
摘要:
An apparatus includes a write element for writing to a medium. The apparatus is configured to effectuate an electrical potential difference between a portion of the apparatus and a portion of the medium such that a current flows between the apparatus and the medium to reduce a coercivity of the medium proximate to the write element.
摘要:
Recording media comprises multiple first and second patterned media islands sequentially placed at different first and second radii along a length of a recording track. A recording head sequentially accesses the first and second islands as the head moves along a length of the recording track. Circumferential spacings between sequential first and second islands along the length of the track vary as a skew function of a track radius.
摘要:
A giant magnetoresistive stack for use in a magnetic read head has a plurality of layers including at least one ferromagnetic layer which contributes to a giant magnetoresistive signal, a doped ferromagnetic pinned layer and a doped ferromagnetic underlayer which do not contribute to a giant magnetoresistive signal. The dopant in the doped ferromagnetic pinned layer and underlayer reduces parasitic shunting current through the giant magnetoresistive stack by providing an increase in resistivity without a decrease in magnetization.