Wire and wire lead designs for a wire-assisted magnetic write device
A magnetic device includes a write element having a write element tip that defines a medium confronting surface. The write element is operable to generate a first field at the medium confronting surface. A conductor is proximate the write element tip and first and second conductive leads are connected to the conductor and configured to deliver a current to the conductor to generate a second field that augments the first field. First and second side elements are disposed on opposite sides of the write element tip in a cross-track direction at the medium confronting surface. At least a portion of the first conductive lead is disposed adjacent the first side element on a side opposite the medium confronting surface, and at least a portion of the second conductive lead is disposed adjacent the second side element on a side opposite the medium confronting surface.
1. An apparatus comprising:
a write element including a write element tip that defines a medium confronting surface, wherein the write element is operable to generate a first field at the medium confronting surface;
an assist device proximate the write element tip, the assist device has a stripe height extending from the medium confronting surface to a side of the assist device distal from the medium confronting surface;
first and second conductive leads connected to the assist device and configured to enable the assist device to generate a second field that augments the first field, at least a portion of the first conductive lead and the second conductive lead are each recessed from the medium confronting surface a distance that is about equal to the stripe height; and
first and second side elements disposed on opposite sides of the write element tip in a cross-track direction at the medium confronting surface, wherein at least a portion of the first conductive lead is disposed adjacent the first side element on a side opposite the medium confronting surface of the first side element, and wherein at least a portion of the second conductive lead is disposed adjacent the second side element on a side opposite the medium confronting surface of the second side element.
2. The apparatus of claim 1 , wherein the first and second conductive leads and the assist device are comprised of the same material.
3. The apparatus of claim 1 , wherein the first and second conductive leads are comprised of a different material than the assist device.
4. The apparatus of claim 1 , wherein the assist device extends between the write element tip and the first and second side elements at the medium confronting surface.
5. The apparatus of claim 1 , wherein the assist device is a conductor and the first and second conductive leads deliver current to the conductor to generate the second field.
6. The apparatus of claim 1 , wherein the first and second side elements are comprised of a magnetic material.
7. The apparatus of claim 1 , wherein the first and second side elements are comprised of a nonmagnetic material.
8. A magnetic device comprising:
a write element including a write element tip, wherein the write element is operable to generate a first field at the write element tip;
a conductor proximate the write element tip at a medium confronting surface, wherein the conductor has a maximum sustainable current density j max , a stripe height h extending from the medium confronting surface to a side of the conductor distal from the medium confronting surface, and a thickness t extending in a down-track direction;
first and second conductive leads connected to the conductor, at least a portion of the first conductive lead and the second conductive lead are each recessed from the medium confronting surface a distance that is about equal to the stripe height; and
a current source that provides a current to the conductor through the first and second conductive leads to generate a second field that augments the first field, wherein the current source provides a maximum current I max , and wherein the stripe height h is about equal to
I
max
j
max
×
t
.
9. The magnetic device of claim 8 , wherein the first and second conductive leads and the conductor are comprised of the same material.
10. The magnetic device of claim 8 , wherein the first and second conductive leads are comprised of a different material than the conductor.
11. The magnetic device of claim 8 , and further comprising:
first and second side elements disposed on opposite sides of the write element tip in a cross-track direction at the medium confronting surface, wherein at least a portion of the first conductive lead is disposed adjacent the first side element on a side opposite the medium confronting surface, and wherein at least a portion of the second conductive lead is disposed adjacent the second side element on a side opposite the medium confronting surface.
12. The magnetic device of claim 11 , wherein the conductor extends between the write element tip and the first and second side elements at the medium confronting surface.
13. The magnetic device of claim 11 , wherein the first and second side elements are comprised of a magnetic material.
14. A magnetic writer comprising:
a write element including a write element tip that defines a medium confronting surface, wherein the write element is operable to generate a first field at the medium confronting surface;
a return element magnetically coupled to the write element distal from the medium confronting surface;
a conductor proximate the write element tip at the medium confronting surface, the conductor a stripe height extending from the medium confronting surface to a side of the conductor distal from the medium confronting surface;
first and second conductive heat sinks connected to the conductor and configured to deliver a current to the conductor to generate a second field that augments the first field, at least a portion of the first conductive heat sink and the second conductive heat sink are each recessed from the medium confronting surface a distance that is about equal to the stripe height; and
first and second side shields disposed on opposite sides of the write element tip in a cross-track direction at the medium confronting surface, wherein at least a portion of the first side shield is disposed adjacent to the first conductive heat sink on a side of the first side shield opposite the medium confronting surface, and wherein at least a portion of the second side shield is disposed adjacent to the second conductive heat sink on a side of the second side shield opposite the medium confronting surface.
15. The magnetic writer of claim 14 , and further comprising:
a current source that provides a current to the conductor to generate a second field that augments the first field, wherein the current source provides a maximum current I max , wherein the conductor has a maximum sustainable current density j max , a stripe height h extending from the medium confronting surface to a side of the conductor distal from the medium confronting surface, and a thickness t extending in a down-track direction, and wherein the stripe height h is about equal to
I
max
j
max
×
t
.
16. The magnetic writer of claim 14 , wherein the first and second conductive heat sinks and the conductor are comprised of the same material.
17. The magnetic writer of claim 14 , wherein the first and second conductive heat sinks are comprised of a different material than the conductor.
18. The magnetic writer of claim 14 , wherein the conductor extends between the write element tip and the first and second side shields at the medium confronting surface.