Magnetic writer having a split yoke
View Patent ↗A method and system for providing a magnetic transducer are described. The magnetic transducer includes a first pole, a write gap, a second pole, a first coil, and a second coil. The first pole has a front portion on which at least a portion of the write gap resides. The second pole includes a split yoke that includes a first portion and a second portion. At least a portion of the first coil resides between the first portion of the split yoke and the first pole. At least a portion of the second coil resides between the second portion of the split yoke and the first pole.
1. A magnetic recording transducer having an air-bearing surface (ABS) comprising:
a first pole having a first front portion at the ABS;
a write gap;
a second pole including a second front portion and a split yoke, at least a portion of the write gap residing on the second front portion of the second pole, the split yoke including a first portion and a second portion, the first portion being physically disconnected from the second portion along a direction substantially parallel to the ABS, the first portion having a first front surface and a first back surface, the first front surface being closer to the ABS than the first back surface, the second portion having a second front surface and a second back surface, the second front surface being closer to the ABS than the second back surface, the second front portion connecting the first front surface of the first portion and the second front surface of the second portion, the first portion and the second portion of the split yoke being connected only through the second front portion of the second pole, at least part of the second front portion residing between the split yoke and the ABS;
a first coil, at least a portion of the first coil residing between the first portion of the split yoke and the first pole; and
a second coil, at least a portion of the second coil residing between the second portion of the split yoke and the first pole.
2. The magnetic recording transducer of claim 1 further comprising:
a third pole including a write portion, the write portion residing on the at least the portion of the write gap.
3. The magnetic recording transducer of claim 1 wherein the split yoke has a length of not more than eight micrometers.
4. The magnetic recording transducer of claim 3 wherein the split yoke has a length of not more than six micrometers.
5. The magnetic recording transducer of claim 4 wherein the split yoke has a length of at least four micrometers.
6. The magnetic recording transducer of claim 1 wherein at least one of the first coil and the second coil is a pancake coil.
7. The magnetic recording transducer of claim 1 wherein at least one of the first coil and the second coil is a solenoid coil.
8. The magnetic recording transducer of claim 1 wherein the first coil is configured to generate a first magnetic field in the first portion of the split yoke, the second coil is configured to generate a second field in the second portion of the split yoke, the first field and the second field being in substantially a same direction.
9. The magnetic recording transducer of claim 1 wherein the first coil includes a first plurality of turns and no portion of the first coil resides between the second portion of the yoke and the first pole, and wherein the second coil includes a second plurality of turns and no part of the second coil resides between the first portion of the yoke and the first pole.
10. A magnetic recording transducer having an air-bearing surface (ABS) and comprising:
a first pole having a first front portion at the ABS;
a write gap;
a second pole including a second front portion and a split yoke, at least a portion of the write gap residing on the second front portion of the second pole, the split yoke including a first portion and a second portion, the first portion being physically disconnected from the second portion along a direction substantially parallel to the ABS, the first portion having a first front surface and a first back surface, the first front surface being closer to the ABS than the first back surface, the second portion having a second front surface and a second back surface, the second front surface being closer to the ABS than the second back surface, the second front portion connecting the first front surface of the first portion and the second front surface of the second portion, the first portion and the second portion of the split yoke being connected only through the second front portion of the second pole, at least part of the second front portion residing between the split yoke and the ABS, the split yoke having a yoke length of at least four microns and not more than six microns;
a first coil, at least a portion of the first coil residing between the first portion of the split yoke and the first pole, the first coil being at least one of a pancake coil and a solenoidal coil; and
a second coil, at least a portion of the second coil residing between the second portion of the split yoke and the first pole, the second coil being at least one of a pancake coil and a solenoidal coil;
a third pole including a write portion, the write portion residing on the at least the portion of the write gap.
11. The magnetic recording transducer of claim 10 wherein the first coil includes a first plurality of turns and no portion of the first coil resides between the second portion of the yoke and the first pole, and wherein the second coil includes a second plurality of turns and no part of the second coil resides between the first portion of the yoke and the first pole.
12. A magnetic recording head comprising:
a slider; and
a magnetic recording transducer integrated with the slider and having an air-bearing surface (ABS), the magnetic recording transducer including a first pole, a write gap, a second pole, a first coil, and a second coil, the first pole having a first front portion, the second pole including a second front portion and a split yoke, at least a portion of the write gap residing on the second front portion of the second pole, the split yoke including a first portion and a second portion, the first portion having a first front surface and a first back surface, the first front surface being closer to the ABS than the first back surface, the second portion having a second front surface and a second back surface, the second front surface being closer to the ABS than the second back surface, at least a portion of the first coil residing between the first portion of the split yoke and the first pole, and at least a portion of the second coil residing between the second portion of the split yoke and the first pole, the first portion being physically disconnected from the second portion along a direction substantially perpendicular to the ABS, the second front portion connecting the first front surface of the first portion and the second front surface of the second portion, the first portion and the second portion of the split yoke being connected only through the second front portion of the second pole, at least part of the second front portion residing between the split yoke and the ABS.
13. The magnetic recording head of claim 12 further comprising:
a third pole including a write portion, the write portion residing on the at least the portion of the write gap.
14. The magnetic recording head of claim 12 wherein the split yoke has a length of not more than eight micrometers.
15. The magnetic recording head of claim 14 wherein the split yoke has a length of not more than six micrometers.
16. The magnetic recording head of claim 15 wherein the split yoke has a length of at least four micrometers.
17. The magnetic recording head of claim 12 wherein at least one of the first coil and the second coil is a pancake coil.
18. The magnetic recording head of claim 12 wherein at least one of the first coil and the second coil is a solenoid coil.
19. The magnetic recording head of claim 12 wherein the first coil is configured to generate a first magnetic field in the first portion of the split yoke, the second coil is configured to generate a second field in the second portion of the split yoke, the first field and the second field being in substantially a same direction.
20. The magnetic recording head of claim 12 wherein the first coil includes a first plurality of turns and no portion of the first coil resides between the second portion of the yoke and the first pole, and wherein the second coil includes a second plurality of turns and no part of the second coil resides between the first portion of the yoke and the first pole.