Method and system for providing an antiferromagnetically coupled writer
View Patent ↗A method and system for fabricating a magnetic transducer are described. The magnetic transducer includes a pole and a nonmagnetic intermediate layer adjacent to the pole. The pole has a paddle and a pole tip including a plurality of sidewalls. The pole includes a first magnetic pole layer, at least one antiferromagnetic coupling (AFC) structure on the first magnetic pole layer, and a second magnetic pole layer on the AFC structure(s). At least a portion of the first magnetic pole layer resides on the sidewalls of the pole tip. The paddle has a paddle width in a track width direction. The pole tip has a pole tip width in a track width direction that is less than the paddle width.
1. A magnetic write transducer comprising:
a pole having a paddle and a pole tip including a plurality of sidewalls, the pole including a first magnetic pole layer, at least one antiferromagnetic coupling (AFC) structure on the first magnetic pole layer, and a second magnetic pole layer on the at least one AFC structure, at least a portion of the first magnetic pole layer residing on the sidewalls of the pole tip, the paddle having a paddle width in a track width direction, pole tip having a pole tip width in a track width direction that is less than the paddle width, the at least one AFC structure residing only in the paddle of the pole, the first magnetic pole layer substantially filling the pole tip such that the pole tip is ferromagnetic;
a nonmagnetic intermediate layer adjacent to the pole.
2. The magnetic transducer of claim 1 wherein each of the at least one AFC structure further includes:
a nonmagnetic layer.
3. The magnetic transducer of claim 2 wherein each of the at least one AFC structure further includes:
a first ferromagnetic layer; and
a second ferromagnetic layer, the nonmagnetic layer residing between the first ferromagnetic layer and the second ferromagnetic layer.
4. The magnetic transducer of claim 2 wherein the nonmagnetic layer includes at least one of Ru, NiCr, and Cr.
5. The magnetic transducer of claim 1 wherein the at least one AFC structure resides only in the paddle of the pole and wherein the first magnetic pole layer substantially fills the pole tip.
6. The magnetic transducer of claim 1 wherein the first magnetic pole layer has a first thickness and a second magnetic pole layer has a second thickness less than the first thickness.
7. The magnetic transducer of claim 1 wherein the first magnetic pole layer has a first thickness and a second magnetic pole layer has a second thickness greater than the first thickness.
8. The magnetic transducer of claim 1 wherein the first magnetic pole layer has a first thickness and a second magnetic pole layer has a second thickness substantially equal to the first thickness.
9. The magnetic transducer of claim 1 wherein a portion of the at least one AFC structure resides in the pole tip.
10. A disk drive comprising:
a media; and
at least one slider including at least one magnetic write transducer, the magnetic write transducer including a pole and a nonmagnetic intermediate layer adjacent to the pole, the pole having a paddle and a pole tip including a plurality of sidewalls, the pole including a first magnetic pole layer, at least one antiferromagnetic coupling (AFC) structure on the first magnetic pole layer, and a second magnetic pole layer on the at least one AFC structure, at least a portion of the first magnetic pole layer residing on the sidewalls of the pole tip, the paddle having a paddle width in a track width direction, pole tip having a pole tip width in a track width direction that is less than the paddle width, the at least one AFC structure residing only in the paddle of the pole, the first magnetic pole layer substantially filling the pole tip such that the pole tip is ferromagnetic.