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US 2011/0211428 A1Published application
Heat-assisted magnetic recording with shaped magnetic and thermal fields to minimize transition curvature
AssigneeSeagate Technology LLC
InventorsSharat Batra, Amit Vasant Itagi, Ganping Ju, Xuhui Jin
Life of this patent
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Abstract
Devices and methods are provided for heat-assisted magnetic recording (HAMR). In an illustrative example, a device includes a magnetic write pole having a convex pole tip; a magnetic opposing pole longitudinally displaced from the magnetic write pole; and a thermal-source component disposed proximate to the magnetic write pole and comprising a laterally elongated thermal-source peg disposed proximate to the convex pole tip.
Claims20
A device comprising:
- a magnetic write pole;
- a magnetic opposing pole longitudinally displaced from the magnetic write pole;
- and
- a thermal-source component disposed proximate to the magnetic write pole and comprising a thermal-source peg with a concave trailing edge that faces the magnetic write pole such that a center of the concave trailing edge is longitudinally displaced away from the write pole relative to sides of the concave trailing edge.
1 more element
A device comprising:
- a magnetic write pole having a magnetic pole tip with an ellipsoidal pole tip face oriented in a forward longitudinal direction;
- a magnetic opposing pole disposed at a forward longitudinal displacement from the magnetic write pole;
- and
- a near field transducer disposed proximate to the magnetic write pole, comprising a near field transducer peg disposed proximate to the pole tip, wherein the near field transducer peg is elongated along a lateral dimension orthogonal to the longitudinal dimension and has an interior constructed from material.
1 more element
A process comprising:
- positioning a magnetic recording head proximate to and in motion relative to a magnetic recording medium, wherein the direction of the relative motion of the magnetic recording head defines a down-track direction;
- emitting optical energy from an optical source comprising a solid thermal source peg on the magnetic recording head onto the magnetic recording medium with an isothermal footprint that has a greater length in a cross-track direction than in the down-track direction, thereby temporarily reducing the magnetic coercivity of a heated portion of the magnetic recording medium;
- and
- generating a magnetic field between a convex magnetic write pole positioned proximate to the optical source on the magnetic recording head, and a magnetic opposing pole disposed on the magnetic recording head, wherein the magnetic field passes through the heated portion of the magnetic recording medium.
1 more element
Dependencies are inferred from the claim text.