HAMR NFT materials with improved thermal stability

Patent metadata

Field	Value
Publication number	US-9805757-B2
Application number	US-201313867179-A
Country	US
Kind code	B2
Filing date	Apr 22, 2013
Priority date	Feb 23, 2010
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A near field transducer includes gold and at least one dopant. The dopant can include at least one of: Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo. The dopant concentration may be in a range from 0.5% and 30%. The dopant can be a nanoparticle oxide of V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th, or a nitride of Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B.

First claim

What is claimed is:

1. An apparatus comprising:
a near field transducer comprising gold and at least one of: nitride particles, oxide particles, or combinations thereof.

2. The apparatus of claim 1 , wherein the nitride particles, oxide particles, or combinations thereof are nanoparticles.

3. The apparatus of claim 1 , wherein the nitride particles, oxide particles, or combinations thereof have a size from 1 to 5 nm.

4. The apparatus of claim 1 , wherein the near field transducer has a thickness in a range from 10 nm to 300 nm.

5. The apparatus of claim 1 , wherein the near field transducer has a thickness in a range from 20 nm to 300 nm.

6. The apparatus of claim 1 , wherein the near field transducer comprises nitride particles selected from Ta, Al, Ti, Si, In, Fe, Zr, Cu, W, or B nitride particles.

7. The apparatus of claim 1 , wherein the near field transducer comprises oxide particles selected from V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th oxide particles.

8. The apparatus of claim 1 further comprising a storage medium and a recording head, the recording head comprising the near field transducer and a waveguide configured to direct light onto the near field transducer; and an arm for positioning the recording head adjacent to the storage medium.

9. An apparatus comprising:
a near field transducer comprising gold and oxide particles.

10. The apparatus of claim 9 , wherein the oxide particles are nanoparticles.

11. The apparatus of claim 9 , wherein the oxide particles have a size from 1 to 5 nm.

12. The apparatus of claim 9 , wherein the oxide particles comprises an oxide of at least one of: V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th.

13. The apparatus of claim 9 , wherein the oxide particles comprises one of: V 2 O 5 , ZrO 2 , MgO, CaO, Al 2 O 3 , TiO 2 , SiO 2 , CeO 2 , Y 2 O 3 , Ta 2 O 5 , WO 2 , or ThO 2 .

14. The apparatus of claim 9 , wherein the oxide particles comprise ZrO 2 , V 2 O 5 , or combinations thereof.

15. An apparatus comprising:
a near field transducer comprising gold and nitride particles.

16. The apparatus of claim 5 , wherein the nitride particles are nanoparticles.

17. The apparatus of claim 15 , wherein the nitride particles have a size from 1 to 5 nm.

18. The apparatus of claim 15 , wherein the nitride particles comprises nitride particles selected from Ta, Al, Ti, Si, In, Fe, Zr, Cu, W, or B nitride particles.

19. The apparatus of claim 15 , wherein the near field transducer has a thickness in a range from 10 nm to 300 nm.

20. The apparatus of claim 1 further comprising a storage medium and a recording head, the recording head comprising the near field transducer and a waveguide configured to direct light onto the near field transducer; and an arm for positioning the recording head adjacent to the storage medium.

Assignees

• Seagate Technology Llc

Inventors

• Zhao Tong
• Kautzky Michael Christopher
• Challener William Albert
• Seigler Michael Allen

Classifications

• G11B2005/0021

  Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal · CPC title

• B82Y10/00 Primary

  Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic · CPC title

• G11B13/04 Primary

  magnetically {or by magnetisation} and optically {or by radiation, for changing or sensing optical properties} · 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

• G02B6/102

  for infrared and ultraviolet radiation · CPC title