Perpendicular magnetic recording head with improved write field gradient
AssigneeSeagate Technology LLC
InventorsPetrus A. Van der Heijden, Sharat Batra, Gregory Parker, Jonathan D. Hannay
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Abstract
A single pole magnetic recording head is provided according to the present invention for perpendicular magnetic recording on a recording medium. The magnetic recording head includes a main magnetic pole and a coil magnetically coupled to the main pole for magnetizing the main pole in a first magnetization direction. The magnetic recording head further includes a layer of ferromagnetic material anti-ferromagnetically coupled to the main pole such that magnetization of the ferromagnetic layer is in a second magnetization direction substantially anti-parallel to the first magnetization direction of the main pole.
Claims20
A perpendicular magnetic recording head comprising:
- a magnetic main pole;
- a coil magnetically coupled to the main pole for magnetizing the main pole in a first magnetization direction;
- and
- a layer of ferromagnetic material anti-ferromagnetically coupled to the main pole such that magnetization of the ferromagnetic layer is in a second magnetization direction substantially anti-parallel to the first magnetization direction of the main pole.
A device comprising:
- a magnetic main pole magnetizable in a first magnetization direction by a coil magnetically coupled thereto;
- and
- a layer of ferromagnetic material anti-ferromagnetically coupled to the main pole such that magnetization of the ferromagnetic layer is in a second magnetization direction substantially anti-parallel to the first magnetization direction of the main pole.
A magnetic recording head comprising:
- a magnetic main pole magnetizable in a first magnetization direction by a coil magnetically coupled thereto, the main pole having leading and trailing edges;
- a layer of ferromagnetic material provided at the trailing edge of the main pole;
- and
- an interlayer provided at the trailing edge of the main pole between the main pole and the ferromagnetic layer, the interlayer anti-ferromagnetically coupling the ferromagnetic layer to the main pole such that magnetization of the ferromagnetic layer is in a second magnetization direction substantially anti-parallel to the first magnetization direction of the main pole.
Dependencies are inferred from the claim text.