Devices including a NFT having at least one amorphous alloy layer

Patent metadata

Field	Value
Publication number	US-9852748-B1
Application number	US-201615372513-A
Country	US
Kind code	B1
Filing date	Dec 8, 2016
Priority date	Dec 8, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

Disclosed are devices that include a near field transducer (NFT), the NFT having a peg and a disc and the peg including peg material and at least one associated amorphous blocker layer, wherein the amorphous blocker layer includes an amorphous metal alloy and the amorphous blocker layer is within the peg material, on one or more surfaces of the peg material, or both.

First claim

What is claimed is:

1. A device comprising:
a near field transducer (NFT), the NFT comprising a peg and a disc and the peg comprising peg material and at least one associated amorphous blocker layer, wherein the amorphous blocker layer comprises an amorphous metal alloy and the amorphous blocker layer is within the peg material, on one or more surfaces of the peg material, or both.

2. The device according to claim 1 , wherein the at least one amorphous blocker layer comprises an alloy of Ta—Cr, Zr—Cr, Nb—Cr, Ni—Zr, Nb—Pd, Nb—Sb, Nb—Ir, Nb—Pt, Nb—Au, Zr—Pt, Zr—Ir, Zr—Au, Rh—Tb, Rh—Ta, Ta—Cr—N, Zr—Cr—N, Nb—Cr—N, or combinations thereof.

3. The device according to claim 1 , wherein the at least one amorphous blocker layer has a thickness from about 5 Å to about 20 Å.

4. The device according to claim 1 , wherein the at least one amorphous blocker layer has a thickness from about 5 Å to about 15 Å.

5. The device according to claim 1 , wherein the at least one amorphous blocker layer is within the peg material.

6. The device according to claim 1 , wherein the NFT comprises more than one amorphous blocker layers within the peg material.

7. The device according to claim 1 , wherein the NFT comprises an amorphous blocker layer on one or more surfaces of the peg material.

8. The device according to claim 1 , wherein the NFT comprises an amorphous blocker layer underneath the peg.

9. The device according to claim 1 , wherein the NFT comprises an amorphous blocker layer on an upper surface of the peg.

10. The device according to claim 1 , wherein the NFT comprises an amorphous blocker layer on one or both side surfaces of the peg.

11. The device according to claim 1 , wherein the NFT comprises an amorphous blocker layer on a back surface of the peg.

12. The device according to claim 1 , wherein the NFT comprises an additional amorphous blocker layer associated with the disc of the NFT.

13. The device according to claim 12 , wherein the additional amorphous blocker layer associated with the disc of the NFT is within the disc material.

14. The device according to claim 12 , wherein the additional amorphous blocker layer associated with the disc of the NFT is on a surface of the disc.

15. The device according to claim 12 , wherein the additional amorphous blocker layer is on a top surface of the disc.

16. The device according to claim 12 , wherein the additional amorphous blocker layer is on one or more side surfaces of the disc.

17. The device according to claim 1 , wherein the NFT comprises gold (Au), silver (Ag), aluminum (Al), copper (Cu), ruthenium (Ru), rhodium (Rh), iridium (Ir), or alloys thereof.

18. A device comprising:
an energy source; and
a near field transducer (NFT), the NFT comprising a peg and a disc and the peg comprising peg material and at least one associated amorphous blocker layer, wherein the amorphous blocker layer comprises an amorphous metal alloy and the amorphous blocker layer is within the peg material, on one or more surfaces of the peg material, or both.

19. The device according to claim 18 , wherein the energy source comprises a laser.

20. The device according to claim 18 further comprising a waveguide, the waveguide configured to receive the energy from the energy source and couple it into the NFT.

Assignees

• Seagate Technology Llc

Inventors

• Sahoo Sarbeswar
• Zhao Tong
• Huang Xiaoyue

Classifications

• G11B5/1278 Primary

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

• G11B5/313 Primary

  Disposition of layers · CPC title

• G11B2005/0021

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

• G11B5/3106

  where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination (G11B5/3133 takes precedence) · CPC title