Reversed mode spin torque oscillator with shaped field generation layer
View Patent ↗The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure adjacent to the main pole and in contact with the STO. The STO includes an FGL and an SPL, and the FGL is disposed between the main pole and the SPL. The FGL includes a side extending over the main pole and at least a portion of the non-magnetic conductive structure. With the FGL disposed proximate to the main pole and over at least a portion of the non-magnetic conductive structure, current crowding and disturbance from the trailing shield are minimized.
1. A magnetic recording head, comprising:
a leading shield;
a trailing shield;
a main pole having a surface at a media facing surface, wherein the surface includes a side;
a spin torque oscillator in contact with the side of the main pole, wherein the spin torque oscillator comprises a spin polarization layer and a field generation layer;
a non-magnetic conductive structure surrounding at least a portion of the main pole;
a first current source directly connected to the main pole and the trailing shield; and
a second current source directly connected to the main pole and the leading shield.
2. The magnetic recording head of claim 1 , wherein the first current source is configured to flow a first current from the main pole to the trailing shield through the spin torque oscillator, and the second current source is configured to flow a second current from the main pole to the leading shield through the non-magnetic conductive structure.
3. The magnetic recording head of claim 1 , wherein the first current source is configured to flow a first current from the trailing shield to the main pole through the spin torque oscillator, and the second current source is configured to flow a second current from the leading shield to the main pole through the non-magnetic conductive structure.
4. The magnetic recording head of claim 1 , further comprising a non-magnetic conductive layer disposed between the trailing shield and the main pole.
5. The magnetic recording head of claim 4 , further comprising a dielectric layer disposed between the spin torque oscillator and the non-magnetic conductive layer and between the trailing shield and the non-magnetic conductive layer.
6. The magnetic recording head of claim 1 , wherein the second current source is connected to a non-magnetic conductive layer.
7. The magnetic recording head of claim 6 , wherein the second current source is configured to flow a third current from the non-magnetic conductive layer to the main pole.
8. A data storage device comprising the magnetic recording head of claim 1 .
9. A magnetic recording head, comprising:
a leading shield;
a trailing shield;
a main pole having a surface at a media facing surface, wherein the surface includes a side;
a spin torque oscillator in contact with the side of the main pole, wherein the spin torque oscillator comprises a spin polarization layer, an underlayer, and a field generation layer disposed on the underlayer;
a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the underlayer of the spin torque oscillator is in contact with the main pole and the non-magnetic conductive structure;
a first current source connected to the main pole and the trailing shield; and
a second current source connected to the main pole, the non-magnetic conductive structure, and the leading shield.
10. The magnetic recording head of claim 9 , wherein the non-magnetic conductive structure comprises a non-magnetic electrically conductive metal.
11. The magnetic recording head of claim 10 , wherein the non-magnetic conductive structure further comprises NiTa, Cr, Cu, or Rh.
12. The magnetic recording head of claim 9 , wherein the spin polarization layer includes a surface at the media facing surface, wherein the surface has a rectangular shape.
13. The magnetic recording head of claim 9 , wherein the underlayer includes a surface at the media facing surface, wherein the surface includes a side in contact with the main pole and the non-magnetic conductive structure.
14. The magnetic recording head of claim 13 , wherein the side of the underlayer has a length substantially greater than the length of a side of the field generation layer.
15. The magnetic recording head of claim 13 , wherein the side of the underlayer has a length substantially the same as the length of the side of the field generation layer.
16. A data storage device comprising the magnetic recording head of claim 9 .
17. A magnetic recording head, comprising:
a leading shield;
a trailing shield;
a main pole having a surface at a media facing surface, wherein the surface includes a side;
a spin torque oscillator in contact with the side of the main pole, wherein the spin torque oscillator comprises a spin polarization layer, an underlayer, and a field generation layer disposed on the underlayer;
a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the underlayer of the spin torque oscillator is in contact with the main pole and the non-magnetic conductive structure;
a first current source connected to the main pole and the trailing shield; and
a second current source connected to the main pole and the non-magnetic conductive structure.
18. The magnetic recording head of claim 17 , wherein the non-magnetic conductive structure comprises NiTa, Cr, Cu, or Rh, wherein the underlayer includes a surface at the media facing surface, and wherein the surface includes a side in contact with the main pole and the non-magnetic conductive structure.
19. A data storage device comprising the magnetic recording head of claim 17 .
20. The magnetic recording head of claim 17 , wherein the side of the underlayer has a length substantially greater than the length of a side of the field generation layer.