Recording head for heat assisted magnetic recording with diffusion barrier surrounding a near field transducer

1. An apparatus comprising:

a near field transducer positioned adjacent to an air bearing surface;

a first magnetic pole;

a heat sink positioned between the first magnetic pole and the near field transducer; and

a diffusion barrier positioned between the near field transducer and the first magnetic pole.

2. The apparatus of claim 1 , wherein the diffusion barrier is positioned between the heat sink and the first magnetic pole.

3. The apparatus of claim 1 , wherein the diffusion barrier is positioned between the near field transducer and the heat sink.

4. The apparatus of claim 1 , wherein the diffusion barrier wraps around a portion of the heat sink.

5. The apparatus of claim 1 , further comprising:

a waveguide having a core layer, wherein the diffusion barrier is positioned between the near field transducer and the core layer.

6. The apparatus of claim 1 , wherein the heat sink comprises one of gold, silver, copper or alloys of gold, silver, or copper, and the diffusion barrier comprises one of Rh, Ru, Ti, Ta, W; an alloy of Rh, Ru, Ti, Ta or W; a boride, a nitride; and a transition metal oxide.

7. The apparatus of claim 6 , wherein:

the alloys of Ti include TiC, TiN, TiCN, TiPd, Ti 3 Pd;

the alloys of Ta include TaC, TaN, TaCN;

the alloys of W include WN, WCN, WTi, WTiN;

the borides include ZrB 2 , TiB 2 , HfB 2 , MgB 2 , and VB 2 ; and

the nitrides include TaN, TiN.

8. The apparatus of claim 1 , wherein the diffusion barrier is spaced from the air bearing surface.

9. The apparatus of claim 1 , wherein the diffusion barrier comprises a multilayer structure.

10. The apparatus of claim 1 , wherein the first magnetic pole comprises one of: Co, Fe, Ni, or alloys containing Co, Fe and/or Ni.

11. The apparatus of claim 1 , wherein the near field transducer comprises an antenna.

12. An apparatus comprising:

a waveguide having a core layer;

a near field transducer positioned adjacent to an air bearing surface;

a first magnetic pole;

a heat sink positioned between the first magnetic pole and the near field transducer; and

a diffusion barrier positioned between the near field transducer and the core layer.

13. The apparatus of claim 12 , wherein the heat sink comprises one of gold, silver, copper or alloys of gold, silver, or copper, and the diffusion barrier comprises one of Rh, Ru, Ti, Ta, W; an alloy of Rh, Ru, Ti, Ta or W; a boride, a nitride; and a transition metal oxide.

14. The apparatus of claim 13 , wherein:

the alloys of Ti include TiC, TiN, TiCN, TiPd, Ti 3 Pd;

the alloys of Ta include TaC, TaN, TaCN;

the alloys of W include WN, WCN, WTi, WTiN;

the borides include ZrB 2 , TiB 2 , HfB 2 , MgB 2 , and VB 2 ; and

the nitrides include TaN, TiN.

15. The apparatus of claim 12 , wherein the first magnetic pole comprises one of: Co, Fe, Ni, or alloys containing Co, Fe and/or Ni.

16. The apparatus of claim 12 , wherein the near field transducer comprises an antenna.

17. An apparatus comprising:

a near field transducer positioned adjacent to an air bearing surface;

a first magnetic pole; and

a heat sink positioned between the first magnetic pole and the near field transducer, wherein heat sink provides a diffusion barrier between the near field transducer and the first magnetic pole.

18. The apparatus of claim 17 , wherein the heat sink comprises one of Rh, Ru, Ti, Ta, W; an alloy of Rh, Ru, Ti, Ta or W; a boride, a nitride; and a transition metal oxide.

19. The apparatus of claim 18 , wherein:

the alloys of Ti include TiC, TiN, TiCN, TiPd, Ti 3 Pd;

the alloys of Ta include TaC, TaN, TaCN;

the alloys of W include WN, WCN, WTi, WTiN;

the borides include ZrB 2 , TiB 2 , HfB 2 , MgB 2 , and VB 2 ; and

the nitrides include TaN, TiN.

20. The apparatus of claim 17 , wherein the first magnetic pole comprises one of: Co, Fe, Ni, or alloys containing Co, Fe and/or Ni.