Methods and apparatus for improved read sensors using a multi-layered seed layer structure having a nitrogenated nickel-tantalum layer
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorMustafa Michael Pinarbasi
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Abstract
A magnetic head with improved hard magnet properties includes a sensor stack structure and a multi-layered seed layer structure formed over crystalline materials of the sensor stack structure. The multi-layered structure has a first layer including chromium-molybdenum (CrMo); a second layer including nitrogenated nickel-tantalum (NiTa+N); and a third layer including chromium-molybdenum (CrMo). A hard bias layer formed over the multi-layered structure is preferably cobalt-platinum-chromium (CoPtCr). Methods of making the magnetic head are also described.
Claims26
A magnetic head, comprising:
- a sensor stack structure;
- a multi-layered structure formed over crystalline materials of the sensor stack structure;
- the multi-layered structure comprising:
- a layer comprising nitrogenated nickel-tantalum (NiTa+N);
- and
- a layer comprising chromium (Cr) formed over the layer comprising NiTa+N.
A hard disk drive, comprising:
- at least one rotatable magnetic disk;
- a spindle supporting the at least one rotatable magnetic disk;
- a disk drive motor for rotating the at least one rotatable magnetic disk;
- a magnetic head for reading data from the at least one rotatable magnetic disk;
- a slider for supporting the magnetic head;
- the magnetic head, comprising:
- a sensor stack structure;
- a multi-layered structure formed over crystalline materials of the sensor stack structure;
- the multi-layered structure comprising:
- a layer comprising nitrogenated nickel-tantalum (NiTa+N);
- and
- a layer comprising chromium (Cr) formed over the layer comprising NiTa+N.
Dependencies are inferred from the claim text.