Texture-control layer for spin torque oscillator

Patent metadata

Field	Value
Publication number	US-9728210-B2
Application number	US-201514952682-A
Country	US
Kind code	B2
Filing date	Nov 25, 2015
Priority date	Nov 25, 2015
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A magnetic field-assisted magnetic recording (MAMR) head is provided, which includes a recording main pole and a texture control layer (TCL), a seed control layer, and a spin torque oscillator (STO) positioned over the main pole, in this order, in a stacking direction from a leading side to a trailing side of the recording head. The STO has a crystallographic preferred growth orientation and includes a spin polarized layer (SPL). The TCL may include a Cu layer.

First claim

The invention claimed is:

1. A magnetic field-assisted magnetic recording (MAMR) head comprising:
a recording main pole; and
a texture control layer (TCL), a seed layer, and a spin torque oscillator (STO) positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
the STO comprises a spin polarized layer and a field generating layer; and
the TCL comprises at least a Cu layer contacting and interfacing with the main pole.

2. The MAMR head of claim 1 , wherein
the spin polarized layer comprises three layers of Co/Pt or Co/Ni.

3. The MAMR head of claim 1 , wherein
a thickness of the Cu layer is at least 15 Å.

4. The MAMR head of claim 1 , wherein
the TCL comprises a Ta layer positioned above the Cu layer.

5. A hard disk drive comprising the MAMR head of claim 1 .

6. An assisted recording system comprising the MAMR head of claim 1 .

7. A magnetic field-assisted magnetic recording (MAMR) head comprising:
a recording main pole; and
a texture control layer (TCL), a seed layer, and a spin torque oscillator (STO) positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
the STO comprises a spin polarized layer and a field generating layer; and
the spin polarized layer comprises a Co—Mn—Ge (CMG) layer sandwiched by two CoFe layers.

8. A hard disk drive comprising the MAMR head of claim 7 .

9. A magnetic field-assisted magnetic recording (MAMR) head comprising:
a recording main pole; and
a texture control layer (TCL), a seed layer, and a spin torque oscillator (STO) positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
the TCL comprises an alloy X—Y—Z comprising element(s) X, element Y, and element Z, wherein
X is one or two transition metals selected from a group consisting of Cr, Mn, Fe, Co, Ni, and Cu;
Y is a metal selected from a group consisting of Zr, Nb, Hf, and Ta; and
Z is an element selected from a group consisting of boron and carbon.

10. The MAMR head of claim 9 , wherein
the TCL comprises an alloy CoFeBTa.

11. The MAMR head of claim 9 , wherein
a thickness of the TCL is at least 5 Å.

12. A hard disk drive comprising the MAMR head of claim 9 .

13. A magnetic field-assisted magnetic recording (MAMR) head comprising:
a recording main pole; and
a texture control layer (TCL), a seed layer, and a spin torque oscillator (STO) positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
the seed layer comprises a bcc layer positioned above an hcp layer.

14. The MAMR head of claim 13 , wherein
the hcp layer comprises Ru.

15. The MAMR head of claim 13 , wherein
the bcc layer comprises NiAl or Cr.

16. A hard disk drive comprising the MAMR head of claim 13 .

17. A magnetic field-assisted magnetic recording (MAMR) head comprising:
a recording main pole; and
a texture control layer (TCL), a seed layer, and a spin torque oscillator (STO) positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
the seed layer comprises a bcc layer positioned above an fcc layer.

18. The MAMR head of claim 17 , wherein
the fcc layer comprises Pt.

19. The MAMR head of claim 17 , wherein
the bcc layer comprises NiAl or Cr.

20. A hard disk drive comprising the MAMR head of claim 17 .

Assignees

• HGST Netherlands BV
• Western Digital Tech Inc

Inventors

• Okamura Susumu
• Sato Yo
• Nagasaka Keiichi
• Sato Masashige

Classifications

• G11B5/3146 Primary

  magnetic layers · CPC title

• G11B2005/0024

  Microwave assisted recording · CPC title

• G11B5/1278

  specially adapted for magnetisations perpendicular to the surface of the record carrier · CPC title

• G11B5/314

  where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers (G11B5/3196 takes precedence) · CPC title

• G11B5/235

  Selection of material for gap filler {(G11B5/232 takes precedence)} · CPC title