System for providing a transducer having a split main pole
A method and system for providing a magnetic recording head is described. The magnetic recording head has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The magnetic recording head includes a main pole, at least one auxiliary pole, a nonmagnetic spacer, and at least one coil. The main pole includes a first main pole piece and a second main pole piece. The first main pole piece includes a pole tip occupying a portion of the ABS and a back edge distal from the ABS. The second main pole piece has a front surface. The auxiliary pole(s) have a front recessed from the ABS and are magnetically coupled with the main pole. The nonmagnetic spacer is between the back edge of the first main pole piece and the front surface of the second main pole piece. The coil(s) are for energizing the main pole.
1. A magnetic recording head having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the magnetic recording head comprising:
a main pole including a first main pole piece and a second main pole piece, the first main pole piece including pole tip occupying a portion of the ABS and a back edge distal from the ABS, the second main pole piece having a front surface, each of the first main pole piece and the second main pole piece being flat;
at least one auxiliary pole having a front recessed from the ABS, the at least one auxiliary pole being magnetically coupled with the main pole;
a nonmagnetic spacer between the back edge of the first main pole piece and the front surface of the second main pole piece; and
at least one coil for energizing the main pole.
2. The magnetic recording head of claim 1 wherein the main pole is a perpendicular magnetic recording pole.
3. The magnetic recording head of claim 1 wherein the at least one auxiliary pole is between the second main pole piece and the return pole.
4. The magnetic recording head of claim 1 wherein the second main pole piece is between the at least one auxiliary pole and the return pole.
5. The magnetic recording head of claim 1 wherein the at least one auxiliary pole includes a first auxiliary pole and a second auxiliary pole, the first auxiliary pole residing between the second auxiliary pole and the return pole.
6. The magnetic recording head of claim 1 wherein the first main pole piece has a first thickness, wherein the second main pole piece has a second thickness, and wherein the first thickness is different from the second thickness.
7. The magnetic recording head of claim 1 wherein the first main pole piece includes at least a first magnetic material, wherein the second main pole piece includes at least a second magnetic material, and wherein the at least the first magnetic material is different from the at least the second magnetic material.
8. A magnetic recording head having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the magnetic recording head comprising:
a main pole including a first main pole piece and a second main pole piece, the first main pole piece including pole tip occupying a portion of the ABS and a back edge distal from the ABS, the second main pole piece having a front surface having a front edge, each of the first main pole piece and the second main pole piece being flat;
at least one auxiliary pole having a front recessed from the ABS, the at least one auxiliary pole being magnetically coupled with the main pole and being flat;
a nonmagnetic spacer between the back edge of the first main pole piece and the front surface of the second main pole piece;
at least one coil for energizing the main pole;
a backgap distal from the ABS; and
a return pole magnetically coupled with the at least one auxiliary pole and the main pole through the backgap;
the first main pole piece includes at least a first magnetic material, wherein the second main pole piece includes at least a second magnetic material, and wherein the at least the first magnetic material is different from the at least the second magnetic material, wherein the at least the first magnetic material has a first saturation magnetization, wherein the at least the second magnetic material has a second saturation magnetization, and wherein the first saturation magnetization is different from the second saturation magnetization.
9. The magnetic recording head of claim 1 wherein the at least one coil includes a helical coil.
10. A perpendicular magnetic recording (PMR) head having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the magnetic recording head comprising:
a main pole including a first main pole piece and a second main pole piece, the first main pole piece including pole tip occupying a portion of the ABS, a back edge distal from the ABS, and a first thickness, the second main pole piece having a front surface and a front edge and a second thickness, the first thickness being substantially the same as the second thickness, each of the first main pole piece and the second main pole piece being flat;
at least one auxiliary pole having a front recessed from the ABS and a back portion, the at least one auxiliary pole being magnetically coupled with the main pole and being flat, the at least one auxiliary pole physically contacting the back edge of the first main pole piece and the front edge of the second main pole piece;
a nonmagnetic spacer adjoining the back edge of the first main pole piece and the front surface of the second main pole piece;
a backgap distal from the ABS and coupled with the back portion of the at least one auxiliary pole;
a return pole magnetically coupled with the at least one auxiliary pole and the main pole through the backgap; and
at least one helical coil for energizing the main pole.
11. A magnetic recording disk drive comprising:
a slider;
a magnetic recording head coupled with the slider and including a main pole, at least one auxiliary pole, a nonmagnetic spacer and at least one coil, the main pole including a first main pole piece and a second main pole piece, the first main pole piece including pole tip occupying a portion of an air-bearing surface (ABS) and a back edge distal from the ABS, each of the first main pole piece and the second main pole piece being flat, the second main pole piece having a front surface and a front edge, the at least one auxiliary pole having a front recessed from the ABS, the at least one auxiliary pole being magnetically coupled with the main pole and being flat, the at least one auxiliary pole physically contacting the back edge of the first main pole piece and the front edge of the second main pole piece, the nonmagnetic spacer being between the back edge of the first main pole piece and the front surface of the second main pole piece, and the at least one coil for energizing the main pole, the backgap being distal from the ABS, the return pole being magnetically coupled with the at least one auxiliary pole and the main pole through the backgap.
12. A method for providing a magnetic recording head having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the method comprising:
providing a main pole including a first main pole piece and a second main pole piece, the first main pole piece including pole tip occupying a portion of the ABS and a back edge distal from the ABS, the second main pole piece having a front surface and a front edge, each of the first main pole piece and the second main pole piece being flat;
providing at least one auxiliary pole having a front recessed from the ABS and a back portion, the at least one auxiliary pole being magnetically coupled with the main pole and being flat;
providing a nonmagnetic spacer adjoining the back edge of the first main pole piece and the front surface of the second main pole piece; and
providing at least one coil for energizing the main pole;
providing a backgap distal from the ABS; and
providing a return pole magnetically coupled with the at least one auxiliary pole and the main pole through the backgap;
wherein the at least one auxiliary pole physically contacts the back edge of the first main pole piece and the front edge of the second main pole piece.
13. The magnetic recording head of claim 1 wherein the nonmagnetic spacer separates the back edge of the first main pole piece and the front surface of the second main pole piece by a distance, the distance being not more than one micron.
14. The perpendicular magnetic recording head of claim 10 wherein the nonmagnetic spacer separates the back edge of the first main pole piece and the front surface of the second main pole piece by a distance, the distance being not more than one micron.
15. The magnetic recording disk drive of claim 11 wherein the nonmagnetic spacer separates the back edge of the first main pole piece and the front surface of the second main pole piece by a distance, the distance being not more than one micron.
16. The magnetic recording head of claim 1 wherein the second main pole piece has a second back edge, the auxiliary pole contacting at least a portion of the back edge of the first main pole piece and a portion of the second back edge of the second main pole piece.
17. The PMR head of claim 10 wherein the second main pole piece has a second back edge, the auxiliary pole contacting at least a portion of the back edge of the first main pole piece and a portion of the second back edge of the second main pole piece.
18. The magnetic recording disk drive of claim 11 wherein the second main pole piece has a second back edge, the auxiliary pole contacting at least a portion of the back edge of the first main pole piece and a portion of the second back edge of the second main pole piece.