Magnetic write device with a cladded write assist element
View Patent ↗A magnetic device includes a write element having a write element tip and a conductor adjacent an edge of the write element tip for carrying current to generate an assist field that augments a write field generated by the write element. A cladding material is disposed on at least one surface of the conductor.
1. A magnetic device comprising:
a write element including a write element tip;
a return element magnetically coupled to the write element;
a write coil for carrying a current to induce a write field in the write element; and
a conductor positioned between the write element and the return element for carrying current to generate an additional field that produces stray field cancellation in a down-track direction and a magnetic cladding material proximate at least one surface of the conductor, wherein a cross-track width of the cladding material is substantially equal to or less than a cross-track width of the conductor.
2. The magnetic device of claim 1 , wherein the magnetic cladding material is proximate a side of the conductor opposite the write element tip.
3. The magnetic device of claim 1 further comprising: a shield extending from the return element toward the write element tip.
4. The magnetic device of claim 1 , wherein the magnetic cladding material is magnetically isolated from the write element.
5. The magnetic device of claim 1 , wherein a cross-track width of the cladding material is less than a cross-track width of the conductor.
6. The magnetic writer of claim 1 , wherein the conductor is a portion of the write coil.
7. A magnetic writer comprising:
a write element that generates a write field at a front surface;
a return element magnetically coupled to the write element;
a write coil for carrying a current to induce the write field at the front surface;
a conductor positioned at the front surface between the write element and the return element for carrying current to generate a field; and
a magnetic cladding proximate a down-track surface of the conductor, wherein a cross-track width of the cladding material is substantially equal to or less than a cross-track width of the conductor.
8. The magnetic writer of claim 7 , wherein the magnetic cladding is on a side of the conductor opposite the write element.
9. The magnetic writer of claim 7 , and further comprising: a shield extending from the return element toward the write element.
10. The magnetic writer of claim 7 , wherein the cladding is magnetically isolated from the write element.
11. The magnetic writer of claim 7 , wherein a cross-track width of the cladding material is less than a cross-track width of the conductor.
12. The magnetic writer of claim 7 , wherein the conductor is a portion of the write coil.
13. A device comprising:
a write element including a write element tip;
a return element magnetically coupled to the write element;
a conductor positioned between the write element and the return element for carrying current to generate an additional field that cancels stray field from the write element tip in a down-track direction, wherein a cross-track width of the conductor is substantially greater than a cross-track width of a cladding material proximate the conductor.
14. The device of claim 13 , wherein a magnetic cladding material is proximate at least one surface of the conductor.
15. The device of claim 14 , further comprising a write coil for carrying a current to induce a write field in the write element.
16. The device of claim 15 , wherein the conductor is positioned at the front surface between the write element and the return element.
17. The device of claim 14 , wherein the magnetic cladding material is between the conductor and the return element.
18. The device of claim 14 , wherein the magnetic cladding material reduces the radial focus of an assist field from the conductor.
19. The device of claim 14 , wherein the magnetic cladding material is magnetically isolated from the write element.
20. The device of claim 13 , wherein a width of the cross-track width of the cladding material is less than a cross-track width of the conductor.