Shield stabilization configuration with applied bias
AssigneeSeagate Technology LLC
InventorsEric Walter Singleton, Junjie Quan, Jae-Young Yi
Life of this patent
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Abstract
An apparatus includes a sensor stack, first and second shields positioned on opposite sides of the sensor stack, and a first shield stabilization structure adjacent to the first shield and applying a bias magnetic field to the first shield. A second shield stabilization structure can be positioned adjacent to the second shield.
Claims20
An apparatus comprising a sensor stack positioned on an air bearing surface (ABS) with a first width, the sensor stack separated from a shield by a stabilization structure having a second width on the ABS greater than the first width, the stabilization structure comprising first, second, third, fourth, fifth, and sixth magnetic layers and a first non-magnetic layer, the first non-magnetic layer contacting first and second laminations having balanced magnetic moments, the first lamination comprising the first, second, third, and fourth magnetic layers with the second layer disposed between the first and third magnetic layers, the first, third, and fifth magnetic layers each comprising a first material and the second magnetic layer comprising a first alloy of the first material, the second lamination comprising the fifth and sixth magnetic layers, the sixth magnetic layer comprising a second alloy of the first material.
A magnetic element comprising:
- a sensor stack positioned on an air bearing surface (ABS) with a first width;
- a first stabilization structure separating the sensor stack from a first shield on the ABS, the stabilization structure comprising first, second, third, fourth, fifth, and sixth magnetic layers and a first non-magnetic layer, the first non-magnetic layer contacting first and second laminations having balanced magnetic moments, the first lamination comprising the first, second, third, and fourth magnetic layers with the second layer disposed between the first and third magnetic layers, the first, third, and fifth magnetic layers each comprising a first material and the second magnetic layer comprising a first alloy of the first material, the second lamination comprising the fifth and sixth magnetic layers, the sixth magnetic layer comprising a second alloy of the first material;
- and
- a second stabilization structure separating the sensor stack from a second shield on the ABS, the first and second stabilization structures each having a second width on the ABS greater than the first width.
A data sensor comprising:
- a sensor stack positioned on an air bearing surface (ABS) with a first width;
- and
- a stabilization structure separating the sensor stack from a shield on the ABS, the stabilization structure and shield each having a second width on the ABS greater than the first width, the stabilization structure comprising first, second, third, fourth, fifth, and sixth magnetic layers and a first non-magnetic layer, the first non-magnetic layer contacting first and second laminations having balanced magnetic moments to bias the stabilization structure and shield, the first lamination comprising the first, second, third, and fourth magnetic layers with the second layer disposed between the first and third magnetic layers, the first, third, and fifth magnetic layers each comprising CoFe material and the second magnetic layer comprising a CoFeX alloy, the second lamination comprising the fifth and sixth magnetic layers, the sixth magnetic layer constructed of a material chosen from the group of:
- CoFeX alloy, or NiFeX alloy.
Dependencies are inferred from the claim text.