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 transducer comprising:
a first pole having a first front portion at the ABS;
a write gap;
a second pole including a second front portion, a back 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 being recessed from the ABS, the split yoke including a first portion, a second portion and a third portion, the third portion residing between the first portion and the ABS and between the second portion and the ABS, the first portion and the second portion of the split yoke being physically connected only at the third portion of the split yoke, the first portion being physically disconnected from the second portion along a direction substantially parallel to the ABS, at least part of the second front portion residing on and in contact the with the third portion of the split yoke;
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. A magnetic recording head comprising:
a slider; and
a magnetic recording transducer integrated with the slider, 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 front portion at the ABS, the second pole including a second front portion, a back 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 being recessed from the ABS, the split yoke including a first portion, a second portion and a third portion, the third portion residing between the first portion and the ABS and between the second portion and the ABS, the first portion and the second portion of the split yoke being physically connected only at the third portion of the split yoke, the first portion being physically disconnected from the second portion along a direction substantially parallel to the ABS, at least part of the second front portion residing on and in contact the with the third portion of the split yoke.
10. The magnetic recording head of claim 9 further comprising:
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 head of claim 9 wherein the split yoke has a length of not more than eight micrometers.
12. The magnetic recording head of claim 11 wherein the split yoke has a length of not more than six micrometers.
13. The magnetic recording head of claim 12 wherein the split yoke has a length of at least four micrometers.
14. The magnetic recording head of claim 9 wherein at least one of the first coil and the second coil is a pancake coil.
15. The magnetic recording head of claim 9 wherein at least one of the first coil and the second coil is a solenoid coil.
16. The magnetic recording head of claim 9 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.