Method and apparatus for providing a self-pinned bias layer that extends beyond the ends of the free layer
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsHardayal Singh Gill, Wen-Chien Hsiao, Jih-Shiuan Luo
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Abstract
A method and apparatus for enhancing thermal stability, improving biasing and reducing damage from electrical surges in self-pinned abutted junction heads. The head includes a free layer having a first end and a second end defining a width selected to form a desired trackwidth and an extended self-pinned bias layer extending beyond the ends of the free layer, the self-pinned bias layer extending beyond the free layer increasing the volume of the extended self-pinned bias layer to provide greater thermal stability and stronger pinning of the free layer.
Claims14
A self-pinned abutted junction magnetic read sensor, comprising:
- a free layer having a first end and a second end defining a width selected to form a desired trackwidth;
- and
- a self-pinned ferromagnetic bias layer extending beyond the ends of the free layer.
A magnetic storage system, comprising:
- a moveable magnetic storage medium for storing data thereon;
- an actuator positionable relative to the moveable magnetic storage medium;
- and
- a magnetoresistive sensor, coupled to the actuator, for reading data from the magnetic recording medium when position to a desired location by the actuator, wherein the magnetoresistive sensor further comprises:
- a free layer having a first end and a second end defining a width selected to form a desired trackwidth;
- and
- a self-pinned ferromagnetic bias layer extending beyond the ends of the free layer.
A self-pinned abutted junction magnetic read sensor, comprising:
- means for sensing having a first end and a second end defining a width selected to form a desired trackwidth;
- and
- self-biased ferromagnetic means for biasing the means for sensing, the self-biased ferromagnetic means for biasing the means for sensing extending beyond the ends of the means for sensing.
A magnetic storage system, comprising:
- a moveable magnetic storage means for storing data thereon;
- an actuator positionable relative to the moveable magnetic storage medium;
- and
- a magnetoresistive sensor, coupled to the actuator, for reading data from the magnetic recording medium when position to a desired location by the actuator, wherein the magnetoresistive sensor further comprises:
- means for sensing having a first end and a second end defining a width selected to form a desired trackwidth;
- and
- self-biased ferromagnetic means for biasing the means for sensing, the self-biased ferromagnetic means for biasing the means for sensing extending beyond the ends of the means for sensing.
Dependencies are inferred from the claim text.